{
 "instance": {
  "hmn-20201231.htm": {
   "axisCustom": 1,
   "axisStandard": 39,
   "contextCount": 791,
   "dts": {
    "calculationLink": {
     "local": [
      "hmn-20201231_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "hmn-20201231_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-eedm-def-2020-01-31.xml",
      "http://xbrl.fasb.org/srt/2020/elts/srt-eedm1-def-2020-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "hmn-20201231.htm"
     ]
    },
    "labelLink": {
     "local": [
      "hmn-20201231_lab.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-doc-2020-01-31.xml",
      "http://xbrl.fasb.org/srt/2020/elts/srt-doc-2020-01-31.xml",
      "https://xbrl.sec.gov/dei/2020/dei-doc-2020-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "hmn-20201231_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2020/dei-ref-2020-01-31.xml",
      "http://xbrl.fasb.org/srt/2020/elts/srt-ref-2020-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-ref-2020-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "hmn-20201231.xsd"
     ],
     "remote": [
      "http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd",
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-roles-2020-01-31.xsd",
      "https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd",
      "https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-parts-codification-2020-01-31.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd"
     ]
    }
   },
   "elementCount": 1187,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2020-01-31": 3,
    "http://www.horacemann.com/20201231": 1,
    "http://xbrl.sec.gov/dei/2020-01-31": 4,
    "total": 8
   },
   "keyCustom": 188,
   "keyStandard": 628,
   "memberCustom": 76,
   "memberStandard": 93,
   "nsprefix": "hmn",
   "nsuri": "http://www.horacemann.com/20201231",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "000010001 - Document - Cover Page",
     "role": "http://www.horacemann.com/role/CoverPage",
     "shortName": "Cover Page",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210131002 - Disclosure - Investments",
     "role": "http://www.horacemann.com/role/Investments",
     "shortName": "Investments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R100": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseRenewalTerm",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240734051 - Disclosure - Operating Leases - Narrative (Details)",
     "role": "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails",
     "shortName": "Operating Leases - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "hmn:LesseeOperatingLeaseNotYetCommencedNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "lease",
      "xsiNil": "false"
     }
    },
    "R101": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LeaseCostTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240744052 - Disclosure - Operating Leases - Components of Lease Cost (Details)",
     "role": "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails",
     "shortName": "Operating Leases - Components of Lease Cost (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LeaseCostTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R102": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeasePayments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240754053 - Disclosure - Operating Leases - Supplemental Cash Flow Information (Details)",
     "role": "http://www.horacemann.com/role/OperatingLeasesSupplementalCashFlowInformationDetails",
     "shortName": "Operating Leases - Supplemental Cash Flow Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeasePayments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R103": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:AssetsAndLiabilitiesLesseeTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseRightOfUseAsset",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240764054 - Disclosure - Operating Leases - Balance Sheet Information (Details)",
     "role": "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails",
     "shortName": "Operating Leases - Balance Sheet Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:AssetsAndLiabilitiesLesseeTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseRightOfUseAsset",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R104": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240774055 - Disclosure - Operating Leases - Future Minimum Operating Lease Payments (Details)",
     "role": "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails",
     "shortName": "Operating Leases - Future Minimum Operating Lease Payments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R105": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:CommonStockParOrStatedValuePerShare",
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240804056 - Disclosure - Shareholders' Equity and Share-Based Compensation - Narrative (Details)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
     "shortName": "Shareholders' Equity and Share-Based Compensation - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:StockRepurchasedDuringPeriodShares",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R106": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240814057 - Disclosure - Shareholders' Equity and Share-Based Compensation - Outstanding Stock Units and Stock Options under Comprehensive Plan (Details)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails",
     "shortName": "Shareholders' Equity and Share-Based Compensation - Outstanding Stock Units and Stock Options under Comprehensive Plan (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstandingTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i0d075f80124e45bf98c7c7b81f778b1e_I20181231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R107": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240824058 - Disclosure - Shareholders' Equity and Share-Based Compensation - Stock Option Activity (Details)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
     "shortName": "Shareholders' Equity and Share-Based Compensation - Stock Option Activity (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "2",
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R108": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240834059 - Disclosure - Shareholders' Equity and Share-Based Compensation - Stock Option Information by Ranges of Exercise Prices (Details)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails",
     "shortName": "Shareholders' Equity and Share-Based Compensation - Stock Option Information by Ranges of Exercise Prices (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ShareBasedCompensationStockOptionOutstandingByExerciseRangeTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "lang": "en-US",
      "name": "us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R109": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240844060 - Disclosure - Shareholders' Equity and Share-Based Compensation - Restricted Stock Activity (Details)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails",
     "shortName": "Shareholders' Equity and Share-Based Compensation - Restricted Stock Activity (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210261003 - Disclosure - Fair Value of Financial Instruments",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstruments",
     "shortName": "Fair Value of Financial Instruments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R110": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:StatutoryAccountingPracticesDisclosureTextBlock",
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesStatutoryNetIncomeAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240874061 - Disclosure - Statutory Information and Dividend Restrictions -Reconciliations of Statutory Capital, Surplus and Net Income (Details)",
     "role": "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsReconciliationsofStatutoryCapitalSurplusandNetIncomeDetails",
     "shortName": "Statutory Information and Dividend Restrictions -Reconciliations of Statutory Capital, Surplus and Net Income (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:StatutoryAccountingPracticesDisclosureTextBlock",
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesStatutoryNetIncomeAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R111": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240884062 - Disclosure - Statutory Information and Dividend Restrictions - Narrative (Details)",
     "role": "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsNarrativeDetails",
     "shortName": "Statutory Information and Dividend Restrictions - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R112": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "hmn:NumberOfSupplementalDefinedBenefitPlansFrozen",
      "reportCount": 1,
      "unique": true,
      "unitRef": "plan",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240914063 - Disclosure - Retirement Plans and Other Postretirement Benefits - Narrative (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "hmn:NumberOfSupplementalDefinedBenefitPlansFrozen",
      "reportCount": 1,
      "unique": true,
      "unitRef": "plan",
      "xsiNil": "false"
     }
    },
    "R113": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6173833638424c7da1176a67806db121_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanContributionsByEmployer",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240924064 - Disclosure - Retirement Plans and Other Postretirement Benefits - Contributions and Plan Assets (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Contributions and Plan Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ContributionAndPlanAssetSummaryTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i73bbfd7123f246c7a91b3df9763e583b_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanContributionsByEmployer",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R114": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i2818473ea08f4e588ce642bf5c0d8d29_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanBenefitObligation",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240934065 - Disclosure - Retirement Plans and Other Postretirement Benefits - Defined Benefit Plan and Supplemental Retirement Plans (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Defined Benefit Plan and Supplemental Retirement Plans (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ie78efe0b80284670b08bfd8f8fe5ba5d_I20171231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanBenefitObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R115": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6173833638424c7da1176a67806db121_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DefinedBenefitPlanBenefitAccrual",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240944066 - Disclosure - Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Cost, Changes in Plan Assets and Benefit Obligations, and AOCI Impacts (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Cost, Changes in Plan Assets and Benefit Obligations, and AOCI Impacts (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6173833638424c7da1176a67806db121_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DefinedBenefitPlanBenefitAccrual",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R116": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetFundedStatusTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i014fc729e02941e289d0eca24868d104_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanFairValueOfPlanAssets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240954067 - Disclosure - Retirement Plans and Other Postretirement Benefits - Fair Value of Plan Assets (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Fair Value of Plan Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAllocationOfPlanAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i3f0e426633bc4e1d88700584e93b09ea_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanFairValueOfPlanAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R117": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6173833638424c7da1176a67806db121_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DefinedBenefitPlanAndOtherPostRetirementPlanMinimumFundingRequired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240964068 - Disclosure - Retirement Plans and Other Postretirement Benefits - Contributions (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Contributions (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6173833638424c7da1176a67806db121_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DefinedBenefitPlanAndOtherPostRetirementPlanMinimumFundingRequired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R118": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i014fc729e02941e289d0eca24868d104_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240974069 - Disclosure - Retirement Plans and Other Postretirement Benefits - Estimated Future Benefit Payments (Details)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails",
     "shortName": "Retirement Plans and Other Postretirement Benefits - Estimated Future Benefit Payments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i014fc729e02941e289d0eca24868d104_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R119": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240994070 - Disclosure - Contingencies and Commitments (Details)",
     "role": "http://www.horacemann.com/role/ContingenciesandCommitmentsDetails",
     "shortName": "Contingencies and Commitments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210331004 - Disclosure - Derivatives",
     "role": "http://www.horacemann.com/role/Derivatives",
     "shortName": "Derivatives",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R120": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "if06071de870b4e9e9f9dd0a47241c27c_D20201001-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241024071 - Disclosure - Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) - Components of Comprehensive Income (Loss) (Details)",
     "role": "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails",
     "shortName": "Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) - Components of Comprehensive Income (Loss) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R121": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241034072 - Disclosure - Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details)",
     "role": "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
     "shortName": "Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R122": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Cash",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241064073 - Disclosure - Supplemental Consolidated Cash and Cash Flow Information - Summary of Cash and Restricted Cash (Details)",
     "role": "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails",
     "shortName": "Supplemental Consolidated Cash and Cash Flow Information - Summary of Cash and Restricted Cash (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:RestrictedCash",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R123": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "icde31f25d620499dbb6dc56d1213e29a_D20190401-20190630",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:TransferOfInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241074074 - Disclosure - Supplemental Consolidated Cash and Cash Flow Information - Narrative (Details)",
     "role": "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationNarrativeDetails",
     "shortName": "Supplemental Consolidated Cash and Cash Flow Information - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "icde31f25d620499dbb6dc56d1213e29a_D20190401-20190630",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:TransferOfInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R124": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfReportableSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "segment",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241104075 - Disclosure - Segment Information - Narrative (Details)",
     "role": "http://www.horacemann.com/role/SegmentInformationNarrativeDetails",
     "shortName": "Segment Information - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfReportableSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "segment",
      "xsiNil": "false"
     }
    },
    "R125": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "if06071de870b4e9e9f9dd0a47241c27c_D20201001-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:InsurancePremiumsAndContractChargesEarned",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241114076 - Disclosure - Segment Information - Summarized Financial Information by Segment (Details)",
     "role": "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
     "shortName": "Segment Information - Summarized Financial Information by Segment (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i297bd0e4fbe04b8281bc13b2d1e94840_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentIncome",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R126": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241124077 - Disclosure - Segment Information - Additional Significant Financial Information by Segment (Details)",
     "role": "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
     "shortName": "Segment Information - Additional Significant Financial Information by Segment (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i743a11f910074eee81fb42a390885db9_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R127": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "if06071de870b4e9e9f9dd0a47241c27c_D20201001-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:InsurancePremiumsAndContractChargesEarned",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241154078 - Disclosure - Unaudited Selected Quarterly Financial Data (Details)",
     "role": "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails",
     "shortName": "Unaudited Selected Quarterly Financial Data (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R128": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "srt:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241174079 - Disclosure - Schedule I Summary of Investments-Other Than Investments in Related Parties (Details)",
     "role": "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails",
     "shortName": "Schedule I Summary of Investments-Other Than Investments in Related Parties (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "srt:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R129": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241194080 - Disclosure - Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
     "shortName": "Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i94cc8a7dcb654ab9a3b8f443109e38c5_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentsAndCash",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ReinsuranceDepositReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210391005 - Disclosure - Deposit Asset on Reinsurance",
     "role": "http://www.horacemann.com/role/DepositAssetonReinsurance",
     "shortName": "Deposit Asset on Reinsurance",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ReinsuranceDepositReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R130": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PreferredStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241204081 - Disclosure - Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Additional Information) (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
     "shortName": "Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Additional Information) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PreferredStockParOrStatedValuePerShare",
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i94cc8a7dcb654ab9a3b8f443109e38c5_I20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:PreferredStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R131": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentIncome",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241214082 - Disclosure - Schedule II Condensed Financial Information of Registrant - Condensed Statements of Operations (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails",
     "shortName": "Schedule II Condensed Financial Information of Registrant - Condensed Statements of Operations (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ie5808c5be641423cbd02ce1762acfd32_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentIncome",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R132": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "if06071de870b4e9e9f9dd0a47241c27c_D20201001-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241224083 - Disclosure - Schedule II Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
     "shortName": "Schedule II Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ie5808c5be641423cbd02ce1762acfd32_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R133": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241244084 - Disclosure - Schedule III and VI Supplementary Insurance Information Supplemental Information Concerning Property and Casualty Insurance Operations (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
     "shortName": "Schedule III and VI Supplementary Insurance Information Supplemental Information Concerning Property and Casualty Insurance Operations (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R134": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "srt:SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "srt:LifeInsuranceInForceGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "241264085 - Disclosure - Schedule IV Reinsurance (Details)",
     "role": "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
     "shortName": "Schedule IV Reinsurance (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "srt:SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "srt:LifeInsuranceInForceGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210411006 - Disclosure - Goodwill and Intangible Assets, net",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnet",
     "shortName": "Goodwill and Intangible Assets, net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210481007 - Disclosure - Unpaid Claims and Claim Expenses",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpenses",
     "shortName": "Unpaid Claims and Claim Expenses",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210551008 - Disclosure - Reinsurance and Catastrophes",
     "role": "http://www.horacemann.com/role/ReinsuranceandCatastrophes",
     "shortName": "Reinsurance and Catastrophes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210601009 - Disclosure - Debt",
     "role": "http://www.horacemann.com/role/Debt",
     "shortName": "Debt",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210641010 - Disclosure - Income Taxes",
     "role": "http://www.horacemann.com/role/IncomeTaxes",
     "shortName": "Income Taxes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210711011 - Disclosure - Operating Leases",
     "role": "http://www.horacemann.com/role/OperatingLeases",
     "shortName": "Operating Leases",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100010002 - Statement - CONSOLIDATED BALANCE SHEETS",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
     "shortName": "CONSOLIDATED BALANCE SHEETS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "hmn:ShortTermAndOtherInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210781012 - Disclosure - Shareholders' Equity and Share-Based Compensation",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensation",
     "shortName": "Shareholders' Equity and Share-Based Compensation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210851013 - Disclosure - Statutory Information and Dividend Restrictions",
     "role": "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictions",
     "shortName": "Statutory Information and Dividend Restrictions",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210891014 - Disclosure - Retirement Plans and Other Postretirement Benefits",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefits",
     "shortName": "Retirement Plans and Other Postretirement Benefits",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210981015 - Disclosure - Contingencies and Commitments",
     "role": "http://www.horacemann.com/role/ContingenciesandCommitments",
     "shortName": "Contingencies and Commitments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211001016 - Disclosure - Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss)",
     "role": "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLoss",
     "shortName": "Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211041017 - Disclosure - Supplemental Consolidated Cash and Cash Flow Information",
     "role": "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformation",
     "shortName": "Supplemental Consolidated Cash and Cash Flow Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211081018 - Disclosure - Segment Information",
     "role": "http://www.horacemann.com/role/SegmentInformation",
     "shortName": "Segment Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:QuarterlyFinancialInformationTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211131019 - Disclosure - Unaudited Selected Quarterly Financial Data",
     "role": "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialData",
     "shortName": "Unaudited Selected Quarterly Financial Data",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:QuarterlyFinancialInformationTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211161020 - Disclosure - Schedule I Summary of Investments-Other Than Investments in Related Parties",
     "role": "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedParties",
     "shortName": "Schedule I Summary of Investments-Other Than Investments in Related Parties",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211181021 - Disclosure - Schedule II Condensed Financial Information of Registrant",
     "role": "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrant",
     "shortName": "Schedule II Condensed Financial Information of Registrant",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100020003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
     "shortName": "CONSOLIDATED BALANCE SHEETS (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211231022 - Disclosure - Schedule III and VI Supplementary Insurance Information Supplemental Information Concerning Property and Casualty Insurance Operations",
     "role": "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperations",
     "shortName": "Schedule III and VI Supplementary Insurance Information Supplemental Information Concerning Property and Casualty Insurance Operations",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "211251023 - Disclosure - Schedule IV Reinsurance",
     "role": "http://www.horacemann.com/role/ScheduleIVReinsurance",
     "shortName": "Schedule IV Reinsurance",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "220022001 - Disclosure - Basis of Presentation and Significant Accounting Policies (Policies)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies",
     "shortName": "Basis of Presentation and Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230033001 - Disclosure - Basis of Presentation and Significant Accounting Policies (Tables)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables",
     "shortName": "Basis of Presentation and Significant Accounting Policies (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentIncomeTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230143002 - Disclosure - Investments (Tables)",
     "role": "http://www.horacemann.com/role/InvestmentsTables",
     "shortName": "Investments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentIncomeTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230273003 - Disclosure - Fair Value of Financial Instruments (Tables)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTables",
     "shortName": "Fair Value of Financial Instruments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230343004 - Disclosure - Derivatives (Tables)",
     "role": "http://www.horacemann.com/role/DerivativesTables",
     "shortName": "Derivatives (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfGoodwillTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230423005 - Disclosure - Goodwill and Intangible Assets, net (Tables)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetTables",
     "shortName": "Goodwill and Intangible Assets, net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfGoodwillTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230493006 - Disclosure - Unpaid Claims and Claim Expenses (Tables)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesTables",
     "shortName": "Unpaid Claims and Claim Expenses (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230563007 - Disclosure - Reinsurance and Catastrophes (Tables)",
     "role": "http://www.horacemann.com/role/ReinsuranceandCatastrophesTables",
     "shortName": "Reinsurance and Catastrophes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:InsurancePremiumsAndContractChargesEarned",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100030004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
     "shortName": "CONSOLIDATED STATEMENTS OF OPERATIONS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:OtherIncome",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:DebtDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230613008 - Disclosure - Debt (Tables)",
     "role": "http://www.horacemann.com/role/DebtTables",
     "shortName": "Debt (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:DebtDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230653009 - Disclosure - Income Taxes (Tables)",
     "role": "http://www.horacemann.com/role/IncomeTaxesTables",
     "shortName": "Income Taxes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LeaseCostTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230723010 - Disclosure - Operating Leases (Tables)",
     "role": "http://www.horacemann.com/role/OperatingLeasesTables",
     "shortName": "Operating Leases (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LeaseCostTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstandingTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230793011 - Disclosure - Shareholders' Equity and Share-Based Compensation (Tables)",
     "role": "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationTables",
     "shortName": "Shareholders' Equity and Share-Based Compensation (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstandingTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230863012 - Disclosure - Statutory Information and Dividend Restrictions (Tables)",
     "role": "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsTables",
     "shortName": "Statutory Information and Dividend Restrictions (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "hmn:StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StatutoryAccountingPracticesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ContributionAndPlanAssetSummaryTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "230903013 - Disclosure - Retirement Plans and Other Postretirement Benefits (Tables)",
     "role": "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables",
     "shortName": "Retirement Plans and Other Postretirement Benefits (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:ContributionAndPlanAssetSummaryTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "231013014 - Disclosure - Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) (Tables)",
     "role": "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossTables",
     "shortName": "Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "231053015 - Disclosure - Supplemental Consolidated Cash and Cash Flow Information (Tables)",
     "role": "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationTables",
     "shortName": "Supplemental Consolidated Cash and Cash Flow Information (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": null
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "231093016 - Disclosure - Segment Information (Tables)",
     "role": "http://www.horacemann.com/role/SegmentInformationTables",
     "shortName": "Segment Information (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "231143017 - Disclosure - Unaudited Selected Quarterly Financial Data (Tables)",
     "role": "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataTables",
     "shortName": "Unaudited Selected Quarterly Financial Data (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100040005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS",
     "shortName": "CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "hmn:OtherComprehensiveIncomeLossChangeInAccountingPrincipleAdjustmentNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermOne",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240044001 - Disclosure - Basis of Presentation and Significant Accounting Policies - Narrative (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermOne",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock",
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCosts",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240054002 - Disclosure - Basis of Presentation and Significant Accounting Policies - Deferred Policy Acquisition Costs (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Deferred Policy Acquisition Costs (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock",
       "us-gaap:DeferredChargesPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i677054c5e4e84363ba3247df3fcbcbd9_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240064003 - Disclosure - Basis of Presentation and Significant Accounting Policies - Adjustments to Amortization Expense (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Adjustments to Amortization Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240074004 - Disclosure - Basis of Presentation and Significant Accounting Policies - Property and Equipment Included in Other Assets (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Property and Equipment Included in Other Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:InvestmentContractAndLifePolicyReservesTableTextBlock",
       "us-gaap:FuturePolicyBenefitsLiabilityPolicy",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240084005 - Disclosure - Basis of Presentation and Significant Accounting Policies - Investment Contract and Life Policy Reserves (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Investment Contract and Life Policy Reserves (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:InvestmentContractAndLifePolicyReservesTableTextBlock",
       "us-gaap:FuturePolicyBenefitsLiabilityPolicy",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6a02f6f78afe402b9cc7fc8e452562d9_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:GuaranteedMinimumDeathBenefitReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240094006 - Disclosure - Basis of Presentation and Significant Accounting Policies - Guaranteed Minimum Death Benefit (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Guaranteed Minimum Death Benefit (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6a02f6f78afe402b9cc7fc8e452562d9_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:GuaranteedMinimumDeathBenefitReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfFHLBFundingAgreementsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240104007 - Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Maturity Dates For FHLB Funding Agreements (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Schedule of Maturity Dates For FHLB Funding Agreements (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfFHLBFundingAgreementsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6337bb82ff5d48c18f8ac29735b080be_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240114008 - Disclosure - Basis of Presentation and Significant Accounting Policies - Fair Value Assumptions for Stock Option Pricing (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Fair Value Assumptions for Stock Option Pricing (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "2",
      "lang": "en-US",
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock",
       "us-gaap:QuarterlyFinancialInformationTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "if06071de870b4e9e9f9dd0a47241c27c_D20201001-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240124009 - Disclosure - Basis of Presentation and Significant Accounting Policies - Calculation of Earnings Per Share, Basic and Diluted (Details)",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
     "shortName": "Basis of Presentation and Significant Accounting Policies - Calculation of Earnings Per Share, Basic and Diluted (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "us-gaap:EarningsPerSharePolicyTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "hmn:IncrementalCommonSharesAttributableToStockOptions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentIncome",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240154010 - Disclosure - Investments - Net Investment Income (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
     "shortName": "Investments - Net Investment Income (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentIncomeTextBlock",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i9fe48679e85a4c57b744873f74f62bc9_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:InvestmentIncomeInvestmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:UnrealizedGainLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i2990e21c8cd84b49891edf8ae0a8ed7f_I20171231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100050006 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
     "shortName": "CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i3a1b6eb316e14867a2c8906f173ace9e_I20171231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealizedInvestmentGainsLosses",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240164011 - Disclosure - Investments - Realized Investment Gains (Losses) (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
     "shortName": "Investments - Realized Investment Gains (Losses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:RealizedGainLossOnInvestmentsTableTextBlock",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ied15b1efab3a48baacb2eb210a08f012_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:RealizedInvestmentGainsLosses",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240174012 - Disclosure - Investments - Net Investment Gains (Losses) By Transaction Type (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails",
     "shortName": "Investments - Net Investment Gains (Losses) By Transaction Type (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240184013 - Disclosure - Investments - Fixed Maturities and Equity Securities (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
     "shortName": "Investments - Fixed Maturities and Equity Securities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i744d559b6bea42809dccfc7a90b6b6d8_I20201231",
      "decimals": "-5",
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240194014 - Disclosure - Investments - Gross Unrealized Losses of Fixed Maturities and Equity Securities in Unrealized Loss Position (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails",
     "shortName": "Investments - Gross Unrealized Losses of Fixed Maturities and Equity Securities in Unrealized Loss Position (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240204015 - Disclosure - Investments - Credit Losses (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsCreditLossesDetails",
     "shortName": "Investments - Credit Losses (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i0d075f80124e45bf98c7c7b81f778b1e_I20181231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240214016 - Disclosure - Investments - Maturities of Fixed Maturities (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails",
     "shortName": "Investments - Maturities of Fixed Maturities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRealizedGainLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240224017 - Disclosure - Investments - Sales of Fixed Maturities and Equity Securities (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails",
     "shortName": "Investments - Sales of Fixed Maturities and Equity Securities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRealizedGainLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240234018 - Disclosure - Investments - Net Unrealized Investment Gains and Losses on Fixed Maturities and Equity Securities (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
     "shortName": "Investments - Net Unrealized Investment Gains and Losses on Fixed Maturities and Equity Securities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:UnrealizedGainLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ie32e83c58a884d64afcc2f3fa8008099_I20171231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:InvestmentGradeRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240244019 - Disclosure - Investments - Narrative (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsNarrativeDetails",
     "shortName": "Investments - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:InvestmentGradeRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeAssets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240254020 - Disclosure - Investments - Offsetting of Assets and Liabilities (Details)",
     "role": "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails",
     "shortName": "Investments - Offsetting of Assets and Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:OffsettingAssetsAndLiabilityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i3093eb1cba69466fb36fe2b2308c1e63_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DerivativeFairValueOfDerivativeAsset",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:CommonStockParOrStatedValuePerShare",
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockParOrStatedValuePerShare",
      "reportCount": 1,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100060007 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical",
     "shortName": "CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:CommonStockDividendsPerShareCashPaid",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:PercentageOfInvestmentPortfolioFairValuePricingServicesOrIndexPrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240284021 - Disclosure - Fair Value of Financial Instruments - Narrative (Details)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
     "shortName": "Fair Value of Financial Instruments - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:PercentageOfInvestmentPortfolioFairValuePricingServicesOrIndexPrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240294022 - Disclosure - Fair Value of Financial Instruments - Financial Instruments Measured and Carried at Fair Value (Details)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
     "shortName": "Fair Value of Financial Instruments - Financial Instruments Measured and Carried at Fair Value (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "icf44892c87524cb480487bbebc70297d_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240304023 - Disclosure - Fair Value of Financial Instruments - Transfers Between Different Fair Value Levels (Details)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
     "shortName": "Fair Value of Financial Instruments - Transfers Between Different Fair Value Levels (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i0d075f80124e45bf98c7c7b81f778b1e_I20181231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240314024 - Disclosure - Fair Value of Financial Instruments - Quantitative Information about Level 3 Fair Value Measurements (Details)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
     "shortName": "Fair Value of Financial Instruments - Quantitative Information about Level 3 Fair Value Measurements (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i234715c0c5364c50bdf6749ad40f9fdc_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:EquitySecuritiesFvNi",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i1944e7beded6426884b61a584110f993_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240324025 - Disclosure - Fair Value of Financial Instruments - Financial Instruments Not Carried at Fair Value (Details)",
     "role": "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
     "shortName": "Fair Value of Financial Instruments - Financial Instruments Not Carried at Fair Value (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i1944e7beded6426884b61a584110f993_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:FixedIndexedAnnuitiesTermMinimum",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240354026 - Disclosure - Derivatives - Narrative (Details)",
     "role": "http://www.horacemann.com/role/DerivativesNarrativeDetails",
     "shortName": "Derivatives - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "hmn:FixedIndexedAnnuitiesTermMinimum",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeAssets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240364027 - Disclosure - Derivatives - Fair Value of Derivatives in Consolidated Balance Sheets (Details)",
     "role": "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
     "shortName": "Derivatives - Fair Value of Derivatives in Consolidated Balance Sheets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "ifa6346ffa7b14fbfa0205fd7b53c2f97_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DerivativeAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R77": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i3b8ec3bbeabb4bec8ede018b25fab2fe_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeGainLossOnDerivativeNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240374028 - Disclosure - Derivatives - Fair Value of Derivatives Included in Consolidated Statements of Operations (Details)",
     "role": "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails",
     "shortName": "Derivatives - Fair Value of Derivatives Included in Consolidated Statements of Operations (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i3b8ec3bbeabb4bec8ede018b25fab2fe_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeGainLossOnDerivativeNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R78": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240384029 - Disclosure - Derivatives - Notional and Fair Value Amounts of Derivative Instruments (Details)",
     "role": "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails",
     "shortName": "Derivatives - Notional and Fair Value Amounts of Derivative Instruments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R79": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i63cc118d0a34447c85e100ff69e0bcb3_I20190630",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceRecoverablesGross",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240404030 - Disclosure - Deposit Asset on Reinsurance - Narrative (Details)",
     "role": "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
     "shortName": "Deposit Asset on Reinsurance - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "hmn:ReinsuranceDepositReceivableTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i77a0fb638ded4023ab6558170428acca_I20190401",
      "decimals": "-8",
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceRecoverablesOnPaidLossesGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromInsurancePremiumsCollected",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100070008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "role": "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
     "shortName": "CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromInsurancePremiumsCollected",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R80": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfGoodwillTextBlock",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GoodwillImpairmentLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240434031 - Disclosure - Goodwill and Intangible Assets, net - Narrative (Details)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
     "shortName": "Goodwill and Intangible Assets, net - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i5ce95ce3332a47f7b29e800a9f05fd3e_I20201231",
      "decimals": "-5",
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R81": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfGoodwillTextBlock",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Goodwill",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240444032 - Disclosure - Goodwill and Intangible Assets, net - Goodwill Rollforward (Details)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
     "shortName": "Goodwill and Intangible Assets, net - Goodwill Rollforward (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfGoodwillTextBlock",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:GoodwillAcquiredDuringPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R82": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240454033 - Disclosure - Goodwill and Intangible Assets, net - Summary of Finite-Lived Intangible Assets (Details)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails",
     "shortName": "Goodwill and Intangible Assets, net - Summary of Finite-Lived Intangible Assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R83": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240464034 - Disclosure - Goodwill and Intangible Assets, net - Estimated Future Amortization (Details)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails",
     "shortName": "Goodwill and Intangible Assets, net - Estimated Future Amortization (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R84": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240474035 - Disclosure - Goodwill and Intangible Assets, net - Summary of Indefinite-Lived Intangibles (Details)",
     "role": "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails",
     "shortName": "Goodwill and Intangible Assets, net - Summary of Indefinite-Lived Intangibles (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R85": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240504036 - Disclosure - Unpaid Claims and Claim Expenses - Summary of Reinsurance Reserve Balances (Details)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails",
     "shortName": "Unpaid Claims and Claim Expenses - Summary of Reinsurance Reserve Balances (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i93c8d93be18844a3a67b46de332487ba_I20171231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R86": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:AutomobileLiabilityCoveragePercentReserves",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240514037 - Disclosure - Unpaid Claims and Claim Expenses - Narrative (Details)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails",
     "shortName": "Unpaid Claims and Claim Expenses - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:AutomobileLiabilityCoveragePercentReserves",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R87": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i52aeaaf46b2a4c9fb861bef391981b5d_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240524038 - Disclosure - Unpaid Claims and Claim Expenses - Average Annual Percentage Payout Of Incurred Claims by Age (Details)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
     "shortName": "Unpaid Claims and Claim Expenses - Average Annual Percentage Payout Of Incurred Claims by Age (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i52aeaaf46b2a4c9fb861bef391981b5d_I20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R88": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i52aeaaf46b2a4c9fb861bef391981b5d_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240534039 - Disclosure - Unpaid Claims and Claim Expenses - Incurred and Paid Claims by Accident Year on a Net Basis (Details)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
     "shortName": "Unpaid Claims and Claim Expenses - Incurred and Paid Claims by Accident Year on a Net Basis (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i52aeaaf46b2a4c9fb861bef391981b5d_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R89": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfReconciliationOfNetIncurredAndPaidClaimsDevelopmentToLiabilityForClaimsAndClaimAdjustmentExpensesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240544040 - Disclosure - Unpaid Claims and Claim Expenses - Reconciliation of Net Incurred and Paid Claims (Details)",
     "role": "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails",
     "shortName": "Unpaid Claims and Claim Expenses - Reconciliation of Net Incurred and Paid Claims (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfReconciliationOfNetIncurredAndPaidClaimsDevelopmentToLiabilityForClaimsAndClaimAdjustmentExpensesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i5e6abc5aecfc4425bb048ca0eb2394ee_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "210011001 - Disclosure - Basis of Presentation and Significant Accounting Policies",
     "role": "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPolicies",
     "shortName": "Basis of Presentation and Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R90": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:ReinsuranceTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LossFromCatastrophes",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240574041 - Disclosure - Reinsurance and Catastrophes - Narrative (Details)",
     "role": "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
     "shortName": "Reinsurance and Catastrophes - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:ReinsuranceTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-5",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LossFromCatastrophes",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R91": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceRecoverables",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240584042 - Disclosure - Reinsurance and Catastrophes - Total Amounts of Reinsurance Recoverables On Unpaid Insurance Reserves (Details)",
     "role": "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails",
     "shortName": "Reinsurance and Catastrophes - Total Amounts of Reinsurance Recoverables On Unpaid Insurance Reserves (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i49d164e8afb843789382cda84b3d418a_I20201231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:ReinsuranceRecoverables",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R92": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DirectInsurancePremiumsWrittenAndContractDeposits",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240594043 - Disclosure - Reinsurance and Catastrophes - Effects of Reinsurance (Details)",
     "role": "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails",
     "shortName": "Reinsurance and Catastrophes - Effects of Reinsurance (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:DirectInsurancePremiumsWrittenAndContractDeposits",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R93": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDebtTableTextBlock",
       "us-gaap:DebtDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortTermBankLoansAndNotesPayable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240624044 - Disclosure - Debt - Summary of Debt (Details)",
     "role": "http://www.horacemann.com/role/DebtSummaryofDebtDetails",
     "shortName": "Debt - Summary of Debt (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDebtTableTextBlock",
       "us-gaap:DebtDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShortTermBankLoansAndNotesPayable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R94": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:FederalHomeLoanBankPurchaseOfFHLBActivityBasedCommonStockAsPercentageOfBorrowingRequired",
      "reportCount": 1,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240634045 - Disclosure - Debt - Narrative (Details)",
     "role": "http://www.horacemann.com/role/DebtNarrativeDetails",
     "shortName": "Debt - Narrative (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:FederalHomeLoanBankAdvancesInterestRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R95": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:CurrentIncomeTaxLiabilitiesAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240664046 - Disclosure - Income Taxes - Income Tax Assets and Liabilities Included in Other Assets and Other Liabilities (Details)",
     "role": "http://www.horacemann.com/role/IncomeTaxesIncomeTaxAssetsandLiabilitiesIncludedinOtherAssetsandOtherLiabilitiesDetails",
     "shortName": "Income Taxes - Income Tax Assets and Liabilities Included in Other Assets and Other Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "hmn:ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "hmn:CurrentIncomeTaxLiabilitiesAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R96": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240674047 - Disclosure - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)",
     "role": "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails",
     "shortName": "Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "id31214032ab1445db58740f6dd79e35e_I20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R97": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CurrentIncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240684048 - Disclosure - Income Taxes - Components of Income Tax Expense (Details)",
     "role": "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails",
     "shortName": "Income Taxes - Components of Income Tax Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CurrentIncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R98": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240694049 - Disclosure - Income Taxes - Reconciliation of Effective Tax Expense (Details)",
     "role": "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails",
     "shortName": "Income Taxes - Reconciliation of Effective Tax Expense (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i6d3f764927014d62a70dc00ae2e442dd_D20200101-20201231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R99": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i7a47035afc3d452ba9a433025f63b638_I20191231",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:UnrecognizedTaxBenefits",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "240704050 - Disclosure - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)",
     "role": "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails",
     "shortName": "Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "hmn-20201231.htm",
      "contextRef": "i986b14c1edf9459297f653ab7d930afd_I20171231",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:UnrecognizedTaxBenefits",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 182,
   "tag": {
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]",
        "terseLabel": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentAnnualReport": {
     "auth_ref": [
      "r854",
      "r855",
      "r856"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an annual report.",
        "label": "Document Annual Report",
        "terseLabel": "Document Annual Report"
       }
      }
     },
     "localname": "DocumentAnnualReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r857"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_DocumentsIncorporatedByReferenceTextBlock": {
     "auth_ref": [
      "r852"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Documents incorporated by reference.",
        "label": "Documents Incorporated by Reference [Text Block]",
        "terseLabel": "Documents Incorporated by Reference"
       }
      }
     },
     "localname": "DocumentsIncorporatedByReferenceTextBlock",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "textBlockItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.",
        "label": "Entity [Domain]",
        "terseLabel": "Entity [Domain]"
       }
      }
     },
     "localname": "EntityDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r859"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityPublicFloat": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.",
        "label": "Entity Public Float",
        "terseLabel": "Entity Public Float"
       }
      }
     },
     "localname": "EntityPublicFloat",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "monetaryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r858"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_EntityVoluntaryFilers": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.",
        "label": "Entity Voluntary Filers",
        "terseLabel": "Entity Voluntary Filers"
       }
      }
     },
     "localname": "EntityVoluntaryFilers",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityWellKnownSeasonedIssuer": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.",
        "label": "Entity Well-known Seasoned Issuer",
        "terseLabel": "Entity Well-known Seasoned Issuer"
       }
      }
     },
     "localname": "EntityWellKnownSeasonedIssuer",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_IcfrAuditorAttestationFlag": {
     "auth_ref": [
      "r854",
      "r855",
      "r856"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ICFR Auditor Attestation Flag",
        "terseLabel": "ICFR Auditor Attestation Flag"
       }
      }
     },
     "localname": "IcfrAuditorAttestationFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_LegalEntityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The set of legal entities associated with a report.",
        "label": "Legal Entity [Axis]",
        "terseLabel": "Legal Entity [Axis]"
       }
      }
     },
     "localname": "LegalEntityAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r851"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security",
        "terseLabel": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r853"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CoverPage"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "hmn_A2018CampFireInCaliforniaMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "2018 Camp Fire In California",
        "label": "2018 Camp Fire In California [Member]",
        "terseLabel": "2018 Camp Fire In California"
       }
      }
     },
     "localname": "A2018CampFireInCaliforniaMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForAnnuityContracts": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for annuity contracts. Acquisition costs are amortized in proportion to estimated gross profits.",
        "label": "Acquisition Costs Amortization In Years For Annuity Contracts",
        "terseLabel": "Amortization term for acquisition costs of annuity contracts"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForAnnuityContracts",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForIndexedUniversalLifeContracts": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for indexed universal life contracts. Acquisition costs are amortized in proportion to estimated gross profits.",
        "label": "Acquisition Costs Amortization In Years For Indexed Universal Life Contracts",
        "terseLabel": "Amortization term for acquisition costs of indexed universal life contracts"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForIndexedUniversalLifeContracts",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermFour": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for individual life contracts. Acquisition costs are amortized in proportion to the anticipated premiums over the terms of the insurance policies.",
        "label": "Acquisition Costs Amortization In Years For Individual Life Contracts Term Four",
        "terseLabel": "Amortization of acquisition costs for individual life contracts, fourth term"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermFour",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermOne": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for individual life contracts. Acquisition costs are amortized in proportion to the anticipated premiums over the terms of the insurance policies.",
        "label": "Acquisition Costs Amortization In Years For Individual Life Contracts Term One",
        "terseLabel": "Amortization of acquisition costs for individual life contracts, first term"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermOne",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermThree": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for individual life contracts. Acquisition costs are amortized in proportion to the anticipated premiums over the terms of the insurance policies.",
        "label": "Acquisition Costs Amortization In Years For Individual Life Contracts Term Three",
        "terseLabel": "Amortization of acquisition costs for individual life contracts, third term"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermThree",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermTwo": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized for individual life contracts. Acquisition costs are amortized in proportion to the anticipated premiums over the terms of the insurance policies.",
        "label": "Acquisition Costs Amortization In Years For Individual Life Contracts Term Two",
        "terseLabel": "Amortization of acquisition costs for individual life contracts, second term"
       }
      }
     },
     "localname": "AcquisitionCostsAmortizationInYearsForIndividualLifeContractsTermTwo",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AdjustmentToAmortizationExpensesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Adjustment to amortization expenses.",
        "label": "Adjustment To Amortization Expenses [Table Text Block]",
        "verboseLabel": "Adjustment to amortization expenses"
       }
      }
     },
     "localname": "AdjustmentToAmortizationExpensesTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_AdjustmentToDeferredPolicyAcquisitionCostAmortizationExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Adjustment To Deferred Policy Acquisition Cost Amortization Expenses [Abstract]",
        "verboseLabel": "Increase (decrease) to DAC amortization expense:"
       }
      }
     },
     "localname": "AdjustmentToDeferredPolicyAcquisitionCostAmortizationExpensesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_AgencyRelationshipsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Agency Relationships [Member]",
        "label": "Agency Relationships [Member]",
        "terseLabel": "Value of agency relationships"
       }
      }
     },
     "localname": "AgencyRelationshipsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AggregateInMoneyDeathBenefitsUnderGuaranteedMinimumDeathBenefitReserveProvision": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate in money death benefits under guaranteed minimum death benefit reserve provision.",
        "label": "Aggregate In Money Death Benefits Under Guaranteed Minimum Death Benefit Reserve Provision",
        "verboseLabel": "Aggregate in-the-money death benefits under the GMDB provision"
       }
      }
     },
     "localname": "AggregateInMoneyDeathBenefitsUnderGuaranteedMinimumDeathBenefitReserveProvision",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AmortizationPeriodOfAcquisitionCostsRelatedToInterestSensitiveLifeContracts": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of years over which capitalized acquisition costs are amortized on interest sensitive life contracts. Capitalized acquisition costs are amortized in proportion to estimated gross profits.",
        "label": "Amortization Period Of Acquisition Costs Related To Interest Sensitive Life Contracts",
        "terseLabel": "Amortization period of acquisition costs of interest sensitive life contracts"
       }
      }
     },
     "localname": "AmortizationPeriodOfAcquisitionCostsRelatedToInterestSensitiveLifeContracts",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermOne": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The period of time over which capitalized acquisition costs are amortized for property and casualty policies. Acquisition costs are amortized over the term of the insurance policy (6 and 12 months).",
        "label": "Amortization Period Of Acquisition Costs Related To Property And Casualty Policy Term One",
        "terseLabel": "Amortization of acquisition costs for property and casualty contracts, first term"
       }
      }
     },
     "localname": "AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermOne",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermTwo": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The period of time over which capitalized acquisition costs are amortized for property and casualty policies. Acquisition costs are amortized over the term of the insurance policy (6 and 12 months).",
        "label": "Amortization Period Of Acquisition Costs Related To Property And Casualty Policy Term Two",
        "terseLabel": "Amortization of acquisition costs for property and casualty contracts, second term"
       }
      }
     },
     "localname": "AmortizationPeriodOfAcquisitionCostsRelatedToPropertyAndCasualtyPolicyTermTwo",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AmortizationPeriodOfAcquisitionCostsRelatedToSupplementalPolicies": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amortization Period Of Acquisition Costs Related To Supplemental Policies",
        "label": "Amortization Period Of Acquisition Costs Related To Supplemental Policies",
        "terseLabel": "Amortization of acquisition costs for supplemental policies"
       }
      }
     },
     "localname": "AmortizationPeriodOfAcquisitionCostsRelatedToSupplementalPolicies",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_AmountLifeCatastropheRiskRetentionPerOccurrence": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount life catastrophe risk retention per occurrence.",
        "label": "Amount Life Catastrophe Risk Retention Per Occurrence",
        "terseLabel": "Amount life catastrophe risk retention per occurrence"
       }
      }
     },
     "localname": "AmountLifeCatastropheRiskRetentionPerOccurrence",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AmountOfGroupLifePolicyInsuranceRiskRetained": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of maximum group life policy insurance risk retained.",
        "label": "Amount Of Group Life Policy Insurance Risk Retained",
        "terseLabel": "Amount of group life policy insurance risk retained"
       }
      }
     },
     "localname": "AmountOfGroupLifePolicyInsuranceRiskRetained",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AmountOfMaximumIndividualLifeInsuranceRiskRetained": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of maximum individual life insurance risk retained.",
        "label": "Amount Of Maximum Individual Life Insurance Risk Retained",
        "terseLabel": "Amount of maximum individual life insurance risk retained"
       }
      }
     },
     "localname": "AmountOfMaximumIndividualLifeInsuranceRiskRetained",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AmountOfPropertyRecoveryRelatedToRiskLosses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of property recovery related to risk losses.",
        "label": "Amount Of Property Recovery Related To Risk Losses",
        "terseLabel": "Amount of property recovery related to risk losses"
       }
      }
     },
     "localname": "AmountOfPropertyRecoveryRelatedToRiskLosses",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AnnuityInsuranceProductLineMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Product line consisting of insurance policies providing annuity contracts.",
        "label": "Annuity Insurance Product Line [Member]",
        "terseLabel": "Retirement",
        "verboseLabel": "Retirement"
       }
      }
     },
     "localname": "AnnuityInsuranceProductLineMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AnnuitySegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annuity Segment [Member]",
        "terseLabel": "Retirement"
       }
      }
     },
     "localname": "AnnuitySegmentMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AssetsAndLiabilitiesLesseeTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Assets And Liabilities, Lessee",
        "label": "Assets And Liabilities, Lessee [Table Text Block]",
        "terseLabel": "Supplemental balance sheet information related to operating leases"
       }
      }
     },
     "localname": "AssetsAndLiabilitiesLesseeTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_AssumedInsurancePremiumsAndContractChargesEarned": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 3.0,
       "parentTag": "hmn_InsurancePremiumsAndContractChargesEarned",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Insurance premiums and contract charges earned for all insurance contracts assumed from other insurers as a result of reinsurance arrangements.",
        "label": "Assumed Insurance Premiums And Contract Charges Earned",
        "verboseLabel": "Premiums and contract charges earned, Assumed from Other Companies"
       }
      }
     },
     "localname": "AssumedInsurancePremiumsAndContractChargesEarned",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AssumedInsurancePremiumsWrittenAndContractDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 3.0,
       "parentTag": "hmn_InsurancePremiumsWrittenAndContractDeposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Insurance premiums written and contract deposits for all insurance contracts assumed from other insurers as a result of reinsurance arrangements.",
        "label": "Assumed Insurance Premiums Written And Contract Deposits",
        "verboseLabel": "Premiums written and contract deposits, Assumed from Other Companies"
       }
      }
     },
     "localname": "AssumedInsurancePremiumsWrittenAndContractDeposits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AutoLiabilityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auto Liability [Member]",
        "terseLabel": "Automobile liability"
       }
      }
     },
     "localname": "AutoLiabilityMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AutoPhysicalDamageMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Auto Physical Damage [Member]",
        "terseLabel": "Automobile\u00a0physical\u00a0damage"
       }
      }
     },
     "localname": "AutoPhysicalDamageMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_AutomobileLiabilityCoveragePercentReserves": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Automobile liability coverage reserves as a percentage of total reserves.",
        "label": "Automobile Liability Coverage Percent Reserves",
        "terseLabel": "Automobile liability coverage percent reserves"
       }
      }
     },
     "localname": "AutomobileLiabilityCoveragePercentReserves",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValuePercentage": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 1.0,
       "parentTag": "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of available for sale debt securities maturing during the next rolling twelve months following the latest balance sheet presented.",
        "label": "Due in 1 year or less, Percent of Total Fair Value",
        "verboseLabel": "Due in 1 year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValuePercentage",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Available for sale securities debt maturities a percentage of fair value.",
        "label": "Total, Percent of Total Fair Value",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of available-for-sale debt securities at cost, net of adjustments, maturing after the twentieth rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, defined) and fair value hedge accounting adjustments.",
        "label": "Due after 20 years, Amortized Cost",
        "verboseLabel": "Due after 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsAmortizedCost",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of available-for-sale debt securities at fair value maturing after the twentieth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 20 years, Fair Value",
        "verboseLabel": "Due after 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsPercentageOfFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 5.0,
       "parentTag": "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of available for sale debt securities maturing after the twentieth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 20 years, Percent of Total Fair Value",
        "verboseLabel": "Due after 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterTwentyYearsPercentageOfFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the eleventh rolling twelve months through the twentieth rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.",
        "label": "Due after 10 years through 20 years, Amortized Cost",
        "verboseLabel": "Due after 10 years through 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyAmortizedCost",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of available-for-sale debt securities at fair value maturing in the eleventh rolling twelve months through the twentieth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 10 years through 20 years, Fair Value",
        "verboseLabel": "Due after 10 years through 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyFairValuePercentage": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 4.0,
       "parentTag": "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of available for sale debt securities maturing in the eleventh rolling twelve months through the twentieth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 10 years through 20 years, Percent of Total Fair Value",
        "verboseLabel": "Due after 10 years through 20 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearElevenThroughTwentyFairValuePercentage",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValuePercentage": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 3.0,
       "parentTag": "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of available for sale debt securities maturing in the sixth rolling twelve months through the tenth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 5 years through 10 years, Percent of Total Fair Value",
        "verboseLabel": "Due after 5 years through 10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValuePercentage",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValuePercentage": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 2.0,
       "parentTag": "hmn_AvailableForSaleSecuritiesDebtMaturitiesPercentageOfFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of available for sale debt securities maturing in the second rolling twelve months through the fifth rolling twelve months following the latest balance sheet presented.",
        "label": "Due after 1 year through 5 years, Percent of Total Fair Value",
        "verboseLabel": "Due after 1 year through 5 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValuePercentage",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]",
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]",
        "verboseLabel": "Fixed maturity securities, Gross Unrealized Losses"
       }
      }
     },
     "localname": "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_BankOfAmericaMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bank of America [Member]",
        "terseLabel": "Bank of America, N.A."
       }
      }
     },
     "localname": "BankOfAmericaMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_BarclaysBankPlcMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Barclays Bank PLC [Member]",
        "terseLabel": "Barclays Bank PLC"
       }
      }
     },
     "localname": "BarclaysBankPlcMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_BenefitConsultantsGroupInc.Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Benefit Consultants Group Inc. [Member]",
        "label": "Benefit Consultants Group Inc. [Member]",
        "terseLabel": "Benefit Consultants Group Inc."
       }
      }
     },
     "localname": "BenefitConsultantsGroupInc.Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_BenefitsWithdrawalsAndNetTransfersToSeparateAccountVariableAnnuityAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for an insurance contract under which the policy holder makes a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date and net transfer to separate account (variable annuity) assets.",
        "label": "Benefits, withdrawals and net transfers to Separate Account (variable annuity) assets",
        "negatedLabel": "Benefits, withdrawals and net transfers to Separate Account (variable annuity) assets"
       }
      }
     },
     "localname": "BenefitsWithdrawalsAndNetTransfersToSeparateAccountVariableAnnuityAssets",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_BusinessAcquiredMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Business Acquired [Member]",
        "label": "Business Acquired [Member]",
        "terseLabel": "Value of business acquired"
       }
      }
     },
     "localname": "BusinessAcquiredMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_CarryingValueFairValueAndFairValueHierarchyOfFinancialAssetsAndFinancialLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value, fair value and fair value hierarchy of financial assets and financial liabilities.",
        "label": "Carrying value, fair value and fair value hierarchy of financial assets and financial liabilities",
        "verboseLabel": "Distribution of Company's fixed maturity portfolio by estimated expected maturity"
       }
      }
     },
     "localname": "CarryingValueFairValueAndFairValueHierarchyOfFinancialAssetsAndFinancialLiabilitiesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_CededCreditRiskRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ceded Credit Risk, Rate",
        "label": "Ceded Credit Risk, Rate",
        "terseLabel": "Minimum crediting rating"
       }
      }
     },
     "localname": "CededCreditRiskRate",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_CededInsurancePremiumsAndContractChargesEarned": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 2.0,
       "parentTag": "hmn_InsurancePremiumsAndContractChargesEarned",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Insurance premiums and contract charges assumed and earned by another insurer as a result of reinsurance arrangements.",
        "label": "Ceded Insurance Premiums And Contract Charges Earned",
        "verboseLabel": "Premiums and contract charges earned, Ceded to Other Companies"
       }
      }
     },
     "localname": "CededInsurancePremiumsAndContractChargesEarned",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_CededInsurancePremiumsWrittenAndContractDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 2.0,
       "parentTag": "hmn_InsurancePremiumsWrittenAndContractDeposits",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Insurance premiums written and contract deposits assumed by another insurer as a result of reinsurance arrangements.",
        "label": "Ceded Insurance Premiums Written And Contract Deposits",
        "verboseLabel": "Premiums written and contract deposits, Ceded to Other Companies"
       }
      }
     },
     "localname": "CededInsurancePremiumsWrittenAndContractDeposits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_CitigroupIncMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Citigroup Inc [Member]",
        "terseLabel": "Citigroup Inc."
       }
      }
     },
     "localname": "CitigroupIncMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ContributionAndPlanAssetSummaryTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of contributions to employees' accounts under the qualified defined contribution plan, the 401(k) plan and the non-qualified defined contribution plan, as well as total assets of the plans.",
        "label": "Contribution and Plan Asset Summary [Table Text Block]",
        "verboseLabel": "Summary of contributions to qualified defined contribution plan, 401(k), non-qualified defined contribution plan and total assets of the plans"
       }
      }
     },
     "localname": "ContributionAndPlanAssetSummaryTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_CoverageAboveRetentionPerOccurrenceUnderLayerOneCatastropheReinsurance": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Coverage provided above retention per occurrence under layer one of catastrophe excess of loss reinsurance coverage.",
        "label": "Coverage Above Retention Per Occurrence Under Layer One Catastrophe Reinsurance",
        "terseLabel": "Coverage above retention per occurrence under layer one catastrophe reinsurance"
       }
      }
     },
     "localname": "CoverageAboveRetentionPerOccurrenceUnderLayerOneCatastropheReinsurance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_CoverageAboveRetentionPerOccurrenceUnderLayerThreeCatastropheReinsurance": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Coverage provided above retention per occurrence under layer three of catastrophe excess of loss reinsurance coverage.",
        "label": "Coverage Above Retention Per Occurrence Under Layer Three Catastrophe Reinsurance",
        "terseLabel": "Coverage above retention per occurrence under layer three catastrophe reinsurance"
       }
      }
     },
     "localname": "CoverageAboveRetentionPerOccurrenceUnderLayerThreeCatastropheReinsurance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_CoverageAboveRetentionPerOccurrenceUnderLayerTwoCatastropheReinsurance": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Coverage provided above retention per occurrence under layer two of catastrophe excess of loss reinsurance coverage.",
        "label": "Coverage Above Retention Per Occurrence Under Layer Two Catastrophe Reinsurance",
        "terseLabel": "Coverage above retention per occurrence under layer two catastrophe reinsurance"
       }
      }
     },
     "localname": "CoverageAboveRetentionPerOccurrenceUnderLayerTwoCatastropheReinsurance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_CreditSuisseInternationalMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Credit Suisse International [Member]",
        "terseLabel": "Credit Suisse International"
       }
      }
     },
     "localname": "CreditSuisseInternationalMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_CurrentIncomeTaxLiabilitiesAssets": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Current income tax assets liabilities.",
        "label": "Current Income Tax Liabilities (Assets)",
        "verboseLabel": "Current"
       }
      }
     },
     "localname": "CurrentIncomeTaxLiabilitiesAssets",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesIncomeTaxAssetsandLiabilitiesIncludedinOtherAssetsandOtherLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DebtInstrumentPercentageOfDiscountOnIssuance": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt instrument percentage of discount on issuance.",
        "label": "Debt Instrument Percentage Of Discount On Issuance",
        "terseLabel": "Discount percent on issuance"
       }
      }
     },
     "localname": "DebtInstrumentPercentageOfDiscountOnIssuance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_DebtInstrumentRedemptionPriceInterestDiscountedAtTreasuryYieldMargin": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Instrument, Redemption Price, Interest Discounted At Treasury Yield Margin",
        "label": "Debt Instrument, Redemption Price, Interest Discounted At Treasury Yield Margin",
        "terseLabel": "Debt redemption price, interest discounted at treasury yield margin"
       }
      }
     },
     "localname": "DebtInstrumentRedemptionPriceInterestDiscountedAtTreasuryYieldMargin",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_DebtSecuritiesAvailableforsaleUnrealizedLossPositionAbstractAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt Securities, Available-for-sale, Unrealized Loss Position Abstract [Abstract]",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position Abstract [Abstract]",
        "verboseLabel": "Fixed maturity securities, Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableforsaleUnrealizedLossPositionAbstractAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_DecreaseIncreaseInReinsuranceDepositsFinancingActivities": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Decrease (Increase) In Reinsurance Deposits, Financing Activities",
        "label": "Decrease (Increase) In Reinsurance Deposits, Financing Activities",
        "negatedTerseLabel": "Change in deposit asset on reinsurance"
       }
      }
     },
     "localname": "DecreaseIncreaseInReinsuranceDepositsFinancingActivities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredCompensationArrangementWithIndividualSharesOutstanding": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails": {
       "order": 3.0,
       "parentTag": "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred compensation arrangement with individual shares outstanding.",
        "label": "Deferred Compensation Arrangement With Individual Shares Outstanding",
        "verboseLabel": "Common stock units related to deferred compensation (in shares)"
       }
      }
     },
     "localname": "DeferredCompensationArrangementWithIndividualSharesOutstanding",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_DeferredIncomeTaxLiabilitiesAssets": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred income tax assets liabilities.",
        "label": "Deferred Income Tax Liabilities (Assets)",
        "verboseLabel": "Deferred"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilitiesAssets",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesIncomeTaxAssetsandLiabilitiesIncludedinOtherAssetsandOtherLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred policy acquisition cost asset by segment.",
        "label": "Deferred Policy Acquisition Cost Asset By Segment [Table Text Block]",
        "verboseLabel": "Deferred policy acquisition costs asset by segment"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostAssetBySegmentTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_DeferredPolicyAcquisitionCostEndingImpactOfUnrealizedInvestmentGainsLosses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred policy acquisition cost ending impact of unrealized investment gains losses.",
        "label": "Deferred Policy Acquisition Cost Ending Impact Of Unrealized Investment Gains Losses",
        "terseLabel": "Deferred policy acquisition costs, impact of unrealized investment gains (losses)"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostEndingImpactOfUnrealizedInvestmentGainsLosses",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredPolicyAcquisitionCostsCorridorAroundTheMean": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred Policy Acquisition Costs, Corridor Around The Mean",
        "label": "Deferred Policy Acquisition Costs, Corridor Around The Mean",
        "terseLabel": "Deferred policy acquisition costs, corridor around the mean"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostsCorridorAroundTheMean",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostRetirementBenefits": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 8.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred tax assets tax deferred expense compensation and benefits pensions and post retirement benefits.",
        "label": "Deferred Tax Assets Tax Deferred Expense Compensation and Benefits Pensions and Post Retirement Benefits",
        "verboseLabel": "Other comprehensive income - net funded status of benefit plans"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostRetirementBenefits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredTaxAssetsTaxDeferredExpenseReinsuranceCommissions": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 7.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred Tax Assets, Tax Deferred Expense, Reinsurance Commissions",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reinsurance Commissions",
        "terseLabel": "Reinsurance commissions"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReinsuranceCommissions",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCostTransitionalRule": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 7.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost, Transitional Rule",
        "label": "Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost, Transitional Rule",
        "terseLabel": "Life insurance future policy benefit reserve (transitional rule)"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCostTransitionalRule",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredTaxLiabilitiesDepositAssetOnReinsurance": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred Tax Liabilities, Deposit Asset On Reinsurance",
        "label": "Deferred Tax Liabilities, Deposit Asset On Reinsurance",
        "verboseLabel": "Life insurance future policy benefit reserve"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesDepositAssetOnReinsurance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredTaxLiabilitiesInvestmentsNetUnrealizedGainsOnFixedMaturitiesAndEquitySecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred tax liabilities investments net unrealized gains on fixed maturities and equity securities.",
        "label": "Deferred Tax Liabilities Investments Net Unrealized Gains on Fixed Maturities and Equity Securities",
        "verboseLabel": "Other comprehensive income - net unrealized gains on securities"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesInvestmentsNetUnrealizedGainsOnFixedMaturitiesAndEquitySecurities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DeferredTaxLiabilitiesTaxDeferredExpenseReservesandAccrualsLossReservesTransitionalRule": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 8.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Loss Reserves, Transitional Rule",
        "label": "Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Loss Reserves, Transitional Rule",
        "terseLabel": "Discounting of unpaid claims and claim expense tax reserves (transitional rule)"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesTaxDeferredExpenseReservesandAccrualsLossReservesTransitionalRule",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAmortizationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Amortization [Abstract]",
        "verboseLabel": "Components of net periodic pension (income) expense:"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAmortizationAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_DefinedBenefitPlanAndOtherPostRetirementPlanExpectedContributionForNextFiscalYearEnd": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan and other post retirement plan expected contributions for the full next fiscal year as of the current fiscal year-end.",
        "label": "Defined Benefit Plan and Other Post Retirement Plan Expected Contribution for Next Fiscal Year End",
        "terseLabel": "Expected contributions (approximations)"
       }
      }
     },
     "localname": "DefinedBenefitPlanAndOtherPostRetirementPlanExpectedContributionForNextFiscalYearEnd",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanAndOtherPostRetirementPlanMinimumFundingRequired": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan and other post retirement plan minimum funding required.",
        "label": "Defined Benefit Plan and Other Post Retirement Plan Minimum Funding Required",
        "terseLabel": "Minimum funding requirement"
       }
      }
     },
     "localname": "DefinedBenefitPlanAndOtherPostRetirementPlanMinimumFundingRequired",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanBenefitAccrual": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan service cost benefit accrual of the plan.",
        "label": "Defined Benefit Plan Benefit Accrual",
        "verboseLabel": "Benefit accrual"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitAccrual",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanPlanAssetsAdministrationExpensePaidbyEmployer": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined Benefit Plan, Plan Assets, Administration Expense Paid by Employer",
        "label": "Defined Benefit Plan, Plan Assets, Administration Expense Paid by Employer",
        "negatedLabel": "Expenses paid"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsAdministrationExpensePaidbyEmployer",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanPrepaidAccruedBenefitExpense": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan prepaid (accrued) benefit expense.",
        "label": "Defined Benefit Plan Prepaid (Accrued) Benefit Expense",
        "terseLabel": "Prepaid (accrued) benefit expense"
       }
      }
     },
     "localname": "DefinedBenefitPlanPrepaidAccruedBenefitExpense",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedBenefitPlanServiceCostOther": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan service cost other expenses of the plan.",
        "label": "Defined Benefit Plan Service Cost Other",
        "verboseLabel": "Other expenses"
       }
      }
     },
     "localname": "DefinedBenefitPlanServiceCostOther",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DefinedContributionPlanVestingPeriodforCompanyContributions": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined Contribution Plan, Vesting Period for Company Contributions",
        "label": "Defined Contribution Plan, Vesting Period for Company Contributions",
        "terseLabel": "Vesting period for Company contributions"
       }
      }
     },
     "localname": "DefinedContributionPlanVestingPeriodforCompanyContributions",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_DepositAssetOnReinsuranceFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deposit Asset On Reinsurance Fair Value Disclosure",
        "label": "Deposit Asset On Reinsurance Fair Value Disclosure",
        "terseLabel": "Deposit asset on reinsurance"
       }
      }
     },
     "localname": "DepositAssetOnReinsuranceFairValueDisclosure",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DepositAssetOnReinsuranceMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Deposit Asset On Reinsurance",
        "label": "Deposit Asset On Reinsurance [Member]",
        "terseLabel": "Deposit Asset On Reinsurance"
       }
      }
     },
     "localname": "DepositAssetOnReinsuranceMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_DerivativeInstrumentsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Derivative instruments [Member]",
        "terseLabel": "Derivatives"
       }
      }
     },
     "localname": "DerivativeInstrumentsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_DirectInsurancePremiumsAndContractChargesEarned": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 1.0,
       "parentTag": "hmn_InsurancePremiumsAndContractChargesEarned",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of insurance premiums earned, premiums earned on the income statement for all insurance contracts before subtracting any amounts ceded to another insurer or adding premiums assumed from other insurers, plus contract charges earned on investment and universal life-type contracts.",
        "label": "Direct Insurance Premiums And Contract Charges Earned",
        "terseLabel": "Premiums and contract charges earned, Gross Amount"
       }
      }
     },
     "localname": "DirectInsurancePremiumsAndContractChargesEarned",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DirectInsurancePremiumsWrittenAndContractDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 1.0,
       "parentTag": "hmn_InsurancePremiumsWrittenAndContractDeposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of insurance premiums written for all insurance contracts before subtracting any amounts ceded to another insurer or adding premiums assumed from other insurers plus contract deposits on investment and universal life-type contracts.",
        "label": "Direct Insurance Premiums Written And Contract Deposits",
        "terseLabel": "Premiums written and contract deposits, Gross Amount"
       }
      }
     },
     "localname": "DirectInsurancePremiumsWrittenAndContractDeposits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_DistributionAcquiredMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Distribution Acquired [Member]",
        "label": "Distribution Acquired [Member]",
        "terseLabel": "Value of distribution acquired"
       }
      }
     },
     "localname": "DistributionAcquiredMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_EffectiveIncomeTaxRateReconciliationCARESActNetOperatingLossCarrybackAmount": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective Income Tax Rate Reconciliation, CARES Act Net Operating Loss Carryback, Amount",
        "label": "Effective Income Tax Rate Reconciliation, CARES Act Net Operating Loss Carryback, Amount",
        "negatedLabel": "CARES Act net operating loss carryback"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateReconciliationCARESActNetOperatingLossCarrybackAmount",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_EffectiveTaxRateReconciliationNondeductibleExpenseCompensationDeductionLimitationAmount": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 8.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective Tax Rate Reconciliation, Nondeductible Expense, Compensation Deduction Limitation, Amount",
        "label": "Effective Tax Rate Reconciliation, Nondeductible Expense, Compensation Deduction Limitation, Amount",
        "terseLabel": "Compensation deduction limitation"
       }
      }
     },
     "localname": "EffectiveTaxRateReconciliationNondeductibleExpenseCompensationDeductionLimitationAmount",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_EquityInNetEarningsOfSubsidiaries": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity in net earnings of subsidiaries.",
        "label": "Equity In Net Earnings Of Subsidiaries",
        "negatedLabel": "Equity in net earnings of subsidiaries",
        "terseLabel": "Equity in net earnings of subsidiaries"
       }
      }
     },
     "localname": "EquityInNetEarningsOfSubsidiaries",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_EstimatedExpectedMaturityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Estimated expected maturity.",
        "label": "Estimated expected maturity:",
        "verboseLabel": "Estimated expected maturity:"
       }
      }
     },
     "localname": "EstimatedExpectedMaturityAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ExercisePriceRangeRangeOneMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exercise Price Range Range One [Member]",
        "terseLabel": "Range One"
       }
      }
     },
     "localname": "ExercisePriceRangeRangeOneMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ExercisePriceRangeRangeThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exercise Price Range Range Three [Member]",
        "terseLabel": "Range Three"
       }
      }
     },
     "localname": "ExercisePriceRangeRangeThreeMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ExercisePriceRangeRangeTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exercise Price Range Range Two [Member]",
        "terseLabel": "Range Two"
       }
      }
     },
     "localname": "ExercisePriceRangeRangeTwoMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of positions with a gross unrealized loss as a percentage of total fixed maturities and equities fair value.",
        "label": "Fair value as percentage of total fixed maturities and equity securities fair value, Total",
        "totalLabel": "Fair value as a percentage of total fixed maturities and equity securities fair value, Total"
       }
      }
     },
     "localname": "FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValueForTwelveMonthsOrLess": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 1.0,
       "parentTag": "hmn_FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of positions with a gross unrealized loss for twelve months or less as a percentage of total fixed maturities and equities fair value.",
        "label": "Fair value as percentage of total fixed maturities and equity securities fair value less than 12 months",
        "verboseLabel": "Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less"
       }
      }
     },
     "localname": "FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValueForTwelveMonthsOrLess",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FairValueAsPercentageOfTotalFixedMaturitiesAndEquitySecuritiesFairValueMoreThan12Months": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 2.0,
       "parentTag": "hmn_FairValueAsPercentageOfAggregateFixedMaturitiesAndEquitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of positions with a gross unrealized loss for more than twelve months as a percentage of total fixed maturities and equities fair value.",
        "label": "Fair value as percentage of total fixed maturities and equity securities fair value more than 12 months",
        "verboseLabel": "Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months"
       }
      }
     },
     "localname": "FairValueAsPercentageOfTotalFixedMaturitiesAndEquitySecuritiesFairValueMoreThan12Months",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydownsAndMaturities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value measurement with unobservable inputs reconciliation recurring basis asset paydowns and maturities.",
        "label": "Paydowns, maturities and distributions",
        "negatedLabel": "Paydowns, maturities and distributions"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydownsAndMaturities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydownsandmaturities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Paydowns And Maturities",
        "label": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPaydownsAndMaturities",
        "negatedLabel": "Paydowns, maturities and distributions"
       }
      }
     },
     "localname": "Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydownsandmaturities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_FavorableDevelopmentOfTotalReservesForPropertyAndCasualtyClaimsOccurringInPriorYears": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The reduction in the estimate of the amount needed to settle claims relating to property and casualty insured events that have occurred in prior years.",
        "label": "Favorable Development Of Total Reserves For Property And Casualty Claims Occurring In Prior Years",
        "terseLabel": "Favorable development of total reserves for property and casualty claims occurring in prior years"
       }
      }
     },
     "localname": "FavorableDevelopmentOfTotalReservesForPropertyAndCasualtyClaimsOccurringInPriorYears",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_FederalHomeLoanBankFundingAgreements": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the federal home loan bank funding agreements.",
        "label": "Federal Home Loan Bank Funding Agreements",
        "terseLabel": "FHLB funding agreements"
       }
      }
     },
     "localname": "FederalHomeLoanBankFundingAgreements",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_FederalHomeLoanBankPurchaseOfFHLBActivityBasedCommonStockAsPercentageOfBorrowingRequired": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Federal Home Loan Bank, Purchase Of FHLB Activity Based Common Stock As Percentage Of Borrowing, Required",
        "label": "Federal Home Loan Bank, Purchase Of FHLB Activity Based Common Stock As Percentage Of Borrowing, Required",
        "terseLabel": "Purchase of FHLB activity-based common stock as percentage of borrowing, required"
       }
      }
     },
     "localname": "FederalHomeLoanBankPurchaseOfFHLBActivityBasedCommonStockAsPercentageOfBorrowingRequired",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FederalHomeLoanBankPurchaseOfFHLBActivityBasedCommonStockPercentageAuthorized": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Federal Home Loan Bank, Purchase Of FHLB Activity Based Common Stock, Percentage, Authorized",
        "label": "Federal Home Loan Bank, Purchase Of FHLB Activity Based Common Stock, Percentage, Authorized",
        "terseLabel": "Purchase of FHLB activity-based common stock as percentage of borrowing, percentage, authorized"
       }
      }
     },
     "localname": "FederalHomeLoanBankPurchaseOfFHLBActivityBasedCommonStockPercentageAuthorized",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FederalHomeLoansBankOfChicagoMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Federal Home Loans Bank Of Chicago [Member]",
        "terseLabel": "FHLB of Chicago"
       }
      }
     },
     "localname": "FederalHomeLoansBankOfChicagoMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_FinancialAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Financial assets.",
        "label": "Financial Assets",
        "verboseLabel": "Financial Assets"
       }
      }
     },
     "localname": "FinancialAssetsAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_FinancialLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Financial Liabilities [Abstract]",
        "verboseLabel": "Financial Liabilities"
       }
      }
     },
     "localname": "FinancialLiabilitiesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_FixedIndexedAnnuitiesTermMinimum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fixed indexed annuities term.",
        "label": "Fixed Indexed Annuities Term Minimum",
        "terseLabel": "Expected contract term"
       }
      }
     },
     "localname": "FixedIndexedAnnuitiesTermMinimum",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_FixedMaturitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fixed maturities.",
        "label": "Fixed maturities",
        "verboseLabel": "Fixed maturities"
       }
      }
     },
     "localname": "FixedMaturitiesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_FourZeroOneKPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Four Zero One K Plan [Member]",
        "verboseLabel": "401(k) plan"
       }
      }
     },
     "localname": "FourZeroOneKPlanMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_FreeStandingDerivativesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Free Standing Derivatives Member",
        "label": "Free Standing Derivatives [Member]",
        "terseLabel": "Free-standing derivatives"
       }
      }
     },
     "localname": "FreeStandingDerivativesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_FrozenSupplementalDefinedBenefitPlansVestingPercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Frozen Supplemental Defined Benefit Plans, Vesting Percentage",
        "label": "Frozen Supplemental Defined Benefit Plans, Vesting Percentage",
        "terseLabel": "Frozen supplemental defined benefit plans, vesting percentage"
       }
      }
     },
     "localname": "FrozenSupplementalDefinedBenefitPlansVestingPercentage",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_FungibleSharePoolGrantOfFullValueShareConversionRatio": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fungible Share Pool, Grant Of Full Value Share Conversion Ratio",
        "label": "Fungible Share Pool, Grant Of Full Value Share Conversion Ratio",
        "terseLabel": "Fungible share pool, grant of full value share conversion ratio"
       }
      }
     },
     "localname": "FungibleSharePoolGrantOfFullValueShareConversionRatio",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "hmn_GainOrLossNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gain Or Loss Net [Abstract]",
        "label": "Gain Or Loss Net [Abstract]",
        "terseLabel": "Total gains or losses"
       }
      }
     },
     "localname": "GainOrLossNetAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_GainOrLossesNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gain Or Losses Net [Abstract]",
        "label": "Gain Or Losses Net [Abstract]",
        "terseLabel": "Total gains or losses"
       }
      }
     },
     "localname": "GainOrLossesNetAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_GovernmentalAgenciesAsRequiredByLawInVariousStatesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Governmental Agencies as Required by Law in Various States [Member]",
        "terseLabel": "Governmental agencies as required by law in various states"
       }
      }
     },
     "localname": "GovernmentalAgenciesAsRequiredByLawInVariousStatesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_GuaranteedMinimumDeathBenefitReserve": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Guaranteed minimum death benefit reserve.",
        "label": "Guaranteed Minimum Death Benefit Reserve",
        "verboseLabel": "GMDB reserve"
       }
      }
     },
     "localname": "GuaranteedMinimumDeathBenefitReserve",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_HealthReimbursementAccountBalance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Health reimbursement account balance.",
        "label": "Health Reimbursement Account Balance",
        "terseLabel": "Health reimbursement account, amount"
       }
      }
     },
     "localname": "HealthReimbursementAccountBalance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_HealthReimbursementAccountsFunding": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Health reimbursement accounts funding.",
        "label": "Health Reimbursement Accounts Funding",
        "terseLabel": "Health reimbursement accounts funding"
       }
      }
     },
     "localname": "HealthReimbursementAccountsFunding",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_HomeownersMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Homeowners [Member]",
        "terseLabel": "Homeowners"
       }
      }
     },
     "localname": "HomeownersMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_HoraceMannLifeInsuranceCompanyAndNTAMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Horace Mann Life Insurance Company And NTA",
        "label": "Horace Mann Life Insurance Company And NTA [Member]",
        "terseLabel": "HMLIC and NTA"
       }
      }
     },
     "localname": "HoraceMannLifeInsuranceCompanyAndNTAMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_IncomeTaxAssetLiabilityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income tax asset liability [Abstract]",
        "terseLabel": "Income tax (asset) liability"
       }
      }
     },
     "localname": "IncomeTaxAssetLiabilityAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesIncomeTaxAssetsandLiabilitiesIncludedinOtherAssetsandOtherLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_IncrementalCommonSharesAttributableToCommonStockUnitsRelatedToDeferredCompensationForEmployees": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Incremental common shares attributable to common stock units related to deferred compensation for employees.",
        "label": "Incremental Common Shares Attributable To Common Stock Units Related To Deferred Compensation For Employees",
        "verboseLabel": "CSUs related to deferred compensation for employees (in shares)"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToCommonStockUnitsRelatedToDeferredCompensationForEmployees",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_IncrementalCommonSharesAttributableToRestrictedCommonStockUnitsRelatedToIncentiveCompensation": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Incremental common shares attributable to restricted common stock units related to incentive compensation.",
        "label": "Incremental Common Shares Attributable To Restricted Common Stock Units Related To Incentive Compensation",
        "terseLabel": "RSUs related to incentive compensation (in shares)"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToRestrictedCommonStockUnitsRelatedToIncentiveCompensation",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_IncrementalCommonSharesAttributableToStockOptions": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Incremental common shares attributable to stock options.",
        "label": "Incremental Common Shares Attributable to Stock Options",
        "verboseLabel": "Stock options (in shares)"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToStockOptions",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_InsurancePremiumsAndContractChargesEarned": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of insurance premiums earned, premiums earned on the income statement for all insurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers, plus contract charges earned on investment and universal life-type contracts.",
        "label": "Premiums and contract charges earned, Net Amount",
        "terseLabel": "Insurance premiums and contract charges earned",
        "totalLabel": "Premiums and contract charges earned, Net Amount",
        "verboseLabel": "Insurance premiums and contract charges earned"
       }
      }
     },
     "localname": "InsurancePremiumsAndContractChargesEarned",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InsurancePremiumsWrittenAndContractDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of insurance premiums written for all insurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers, plus contract deposits on investment and universal life-type contracts.",
        "label": "Insurance Premiums Written And Contract Deposits",
        "terseLabel": "Insurance premiums written and contract deposits",
        "totalLabel": "Premiums written and contract deposits, Net Amount"
       }
      }
     },
     "localname": "InsurancePremiumsWrittenAndContractDeposits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InterestAccruedOnReinsuranceDeposit": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest Accrued On Reinsurance Deposit",
        "label": "Interest Accrued On Reinsurance Deposit",
        "terseLabel": "Interest accrued on reinsurance deposit"
       }
      }
     },
     "localname": "InterestAccruedOnReinsuranceDeposit",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InterestSensitiveLifeContractsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Interest Sensitive Life Contracts [Member]",
        "terseLabel": "Interest sensitive life contracts"
       }
      }
     },
     "localname": "InterestSensitiveLifeContractsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_InvestmentContractAndLifePolicyReservesAccountValuesOnLifeContractsFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Contract And Life Policy Reserves, Account Values On Life Contracts, Fair Value",
        "label": "Investment Contract And Life Policy Reserves, Account Values On Life Contracts, Fair Value",
        "verboseLabel": "Investment contract and life policy reserves, account values on life contracts"
       }
      }
     },
     "localname": "InvestmentContractAndLifePolicyReservesAccountValuesOnLifeContractsFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InvestmentContractAndLifePolicyReservesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table of investment contract and life policy reserves, shown as a text block.",
        "label": "Investment Contract And Life Policy Reserves [Table Text Block]",
        "verboseLabel": "Investment contract and life policy reserves"
       }
      }
     },
     "localname": "InvestmentContractAndLifePolicyReservesTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_InvestmentContractAndPolicyReservesFixedAnnuityContractsFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Contract And Policy Reserves, Fixed Annuity Contracts, Fair Value",
        "label": "Investment Contract And Policy Reserves, Fixed Annuity Contracts, Fair Value",
        "verboseLabel": "Investment contract and policy reserves, fixed annuity contracts"
       }
      }
     },
     "localname": "InvestmentContractAndPolicyReservesFixedAnnuityContractsFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InvestmentContractandPolicyLifeReservesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Contract and Policy Life Reserves [Member]",
        "label": "Investment Contract and Policy Life Reserves [Member]",
        "terseLabel": "IUL - embedded derivatives, reported in Investment contract and policy reserves"
       }
      }
     },
     "localname": "InvestmentContractandPolicyLifeReservesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_InvestmentDebtSecuritiesAverageOptionAdjustedDuration": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment debt securities average option adjusted duration expressed in number of years.",
        "label": "Average option-adjusted duration, in years",
        "terseLabel": "Average option-adjusted duration, in years"
       }
      }
     },
     "localname": "InvestmentDebtSecuritiesAverageOptionAdjustedDuration",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_InvestmentGainLossOnReinsurance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Gain (Loss) On Reinsurance",
        "label": "Investment Gain (Loss) On Reinsurance",
        "terseLabel": "Investment gain realized on transfer"
       }
      }
     },
     "localname": "InvestmentGainLossOnReinsurance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InvestmentGainLossOnReinsuranceNetOfTax": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Gain (Loss) On Reinsurance, Net Of Tax",
        "label": "Investment Gain (Loss) On Reinsurance, Net Of Tax",
        "terseLabel": "Investment gain realized, net of tax"
       }
      }
     },
     "localname": "InvestmentGainLossOnReinsuranceNetOfTax",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_InvestmentGradeRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of fair value of fixed maturity and equity securities with a gross unrealized loss having an investment grade rating at period end.",
        "label": "Investment Grade Rate",
        "terseLabel": "Investment grade rating"
       }
      }
     },
     "localname": "InvestmentGradeRate",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_InvestmentPortfolioMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment Portfolio",
        "label": "Investment Portfolio [Member]",
        "terseLabel": "Investment Portfolio"
       }
      }
     },
     "localname": "InvestmentPortfolioMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_LeaseHoldImprovementsAndOtherPropertyAndEquipmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lease hold Improvements And Other Property And Equipment [Member]",
        "terseLabel": "Lease hold improvements and other property and equipment"
       }
      }
     },
     "localname": "LeaseHoldImprovementsAndOtherPropertyAndEquipmentMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_LesseeOperatingLeaseNotYetCommencedNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Lessee, Operating Lease, Not Yet Commenced, Number",
        "label": "Lessee, Operating Lease, Not Yet Commenced, Number",
        "terseLabel": "Number of operating lease not yet commenced"
       }
      }
     },
     "localname": "LesseeOperatingLeaseNotYetCommencedNumber",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "hmn_LiabilityForFuturePolicyBenefitsDerivativeInstrumentsCarryingAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount of accrued obligation to policyholders that relates to insured events under other insurance contracts.",
        "label": "Liability For Future Policy Benefits Derivative Instruments Carrying Amount",
        "verboseLabel": "IUL - embedded derivatives, reported in Investment contract and policy reserves"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitsDerivativeInstrumentsCarryingAmount",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_LiabilityForFuturePolicyBenefitsDerivativeInstrumentsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value disclosure of accrued obligation to policyholders that relates to insured events under other insurance contracts.",
        "label": "Liability For Future Policy Benefits Derivative Instruments Fair Value Disclosure",
        "terseLabel": "Investment contract and life policy reserves, embedded derivatives"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitsDerivativeInstrumentsFairValueDisclosure",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_LiabilityForOtherThanShortDurationAndUnallocatedClaimsAdjustmentExpenses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Liability For Other Than Short Duration And Unallocated Claims Adjustment Expenses",
        "label": "Liability For Other Than Short Duration And Unallocated Claims Adjustment Expenses",
        "terseLabel": "Total other than short duration and unallocated claims adjustment expenses"
       }
      }
     },
     "localname": "LiabilityForOtherThanShortDurationAndUnallocatedClaimsAdjustmentExpenses",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_LifeAndAnnuitySegmentsCombinedMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Life and Annuity Segments Combined [Member]",
        "terseLabel": "Life and Annuity segments"
       }
      }
     },
     "localname": "LifeAndAnnuitySegmentsCombinedMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_LifeAndHealthMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Life and Health [Member]",
        "terseLabel": "Life",
        "verboseLabel": "Life"
       }
      }
     },
     "localname": "LifeAndHealthMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails",
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_LongTailCoverageReservesAsPercentageOfReserves": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Long tail coverage reserves as a percentage of total reserves.",
        "label": "Long Tail Coverage Reserves As Percentage Of Reserves",
        "terseLabel": "Long tail coverage reserves as percentage of reserves"
       }
      }
     },
     "localname": "LongTailCoverageReservesAsPercentageOfReserves",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_LossBeforeEquityInNetIncomeOfConsolidatedSubsidiariesAfterTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Loss before equity in net income of consolidated subsidiaries after tax.",
        "label": "Loss Before Equity in Net Income of Consolidated Subsidiaries after Tax",
        "negatedTotalLabel": "Loss before equity in net earnings of subsidiaries"
       }
      }
     },
     "localname": "LossBeforeEquityInNetIncomeOfConsolidatedSubsidiariesAfterTax",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_MaturingOnDecember152023Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maturing On December 15 2023 [Member]",
        "terseLabel": "Maturing On December 15, 2023"
       }
      }
     },
     "localname": "MaturingOnDecember152023Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnFebruary122021Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On February 12 2021",
        "label": "Maturing On February 12 2021 [Member]",
        "terseLabel": "Maturing On February 12 2021"
       }
      }
     },
     "localname": "MaturingOnFebruary122021Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnJanuary122024Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On January 12 2024 [Member]",
        "label": "Maturing On January 12 2024 [Member]",
        "terseLabel": "Maturing On January 12, 2024"
       }
      }
     },
     "localname": "MaturingOnJanuary122024Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnJanuary152021Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On January 15 2021",
        "label": "Maturing On January 15 2021 [Member]",
        "terseLabel": "Maturing On January 15, 2021"
       }
      }
     },
     "localname": "MaturingOnJanuary152021Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnJanuary162026Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maturing On January 16 2026 [Member]",
        "terseLabel": "Maturing On January 16, 2026"
       }
      }
     },
     "localname": "MaturingOnJanuary162026Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnJune262025Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On June 26 2025",
        "label": "Maturing On June 26 2025 [Member]",
        "terseLabel": "Maturing On June 26 2025"
       }
      }
     },
     "localname": "MaturingOnJune262025Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnMay172021Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On May 17 2021",
        "label": "Maturing On May 17 2021 [Member]",
        "terseLabel": "Maturing On May 17 2021"
       }
      }
     },
     "localname": "MaturingOnMay172021Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnNovember152023Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On November 15 2023 [Member]",
        "label": "Maturing On November 15 2023 [Member]",
        "terseLabel": "Maturing On November 15, 2023"
       }
      }
     },
     "localname": "MaturingOnNovember152023Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturingOnSeptember112025Member": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturing On September 11 2025",
        "label": "Maturing On September 11 2025 [Member]",
        "terseLabel": "Maturing On September 11 2025"
       }
      }
     },
     "localname": "MaturingOnSeptember112025Member",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturityDateAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maturity Date [Axis]",
        "terseLabel": "Maturity Date [Axis]"
       }
      }
     },
     "localname": "MaturityDateAxis",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_MaturityDateDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maturity Date [Domain]",
        "terseLabel": "Maturity Date [Domain]"
       }
      }
     },
     "localname": "MaturityDateDomain",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturityPeriodOneMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturity Period One [Member]",
        "label": "Maturity Period One [Member]",
        "terseLabel": "October 5, 2022"
       }
      }
     },
     "localname": "MaturityPeriodOneMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MaturityPeriodTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maturity Period Two [Member]",
        "label": "Maturity Period Two [Member]",
        "terseLabel": "December 2, 2022"
       }
      }
     },
     "localname": "MaturityPeriodTwoMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputEquityValueMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Equity Value",
        "label": "Measurement Input Equity Value [Member]",
        "terseLabel": "equity value"
       }
      }
     },
     "localname": "MeasurementInputEquityValueMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputHaircutMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Haircut",
        "label": "Measurement Input Haircut [Member]",
        "terseLabel": "haircut"
       }
      }
     },
     "localname": "MeasurementInputHaircutMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputISpreadMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input I Spread",
        "label": "Measurement Input I Spread [Member]",
        "terseLabel": "I spread"
       }
      }
     },
     "localname": "MeasurementInputISpreadMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputLapseMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Lapse",
        "label": "Measurement Input Lapse [Member]",
        "terseLabel": "lapse rate"
       }
      }
     },
     "localname": "MeasurementInputLapseMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputMortalityMultiplierMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Mortality Multiplier",
        "label": "Measurement Input Mortality Multiplier [Member]",
        "terseLabel": "Mortality multiplier"
       }
      }
     },
     "localname": "MeasurementInputMortalityMultiplierMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputNSpreadMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input N Spread",
        "label": "Measurement Input N Spread [Member]",
        "terseLabel": "N spread"
       }
      }
     },
     "localname": "MeasurementInputNSpreadMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputNonPerformanceAdjustmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Non Performance Adjustment",
        "label": "Measurement Input Non Performance Adjustment [Member]",
        "terseLabel": "non-performance adjustment"
       }
      }
     },
     "localname": "MeasurementInputNonPerformanceAdjustmentMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputOptionAdjustedSpreadMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Option Adjusted Spread",
        "label": "Measurement Input Option Adjusted Spread [Member]",
        "terseLabel": "option adjusted spread"
       }
      }
     },
     "localname": "MeasurementInputOptionAdjustedSpreadMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputOptionBudgetMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input Option Budget",
        "label": "Measurement Input Option Budget [Member]",
        "terseLabel": "option budget"
       }
      }
     },
     "localname": "MeasurementInputOptionBudgetMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputPDIInterestMarginMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input P D I Interest Margin",
        "label": "Measurement Input P D I Interest Margin [Member]",
        "terseLabel": "P D I interest margin"
       }
      }
     },
     "localname": "MeasurementInputPDIInterestMarginMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputSBLInterestMarginMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input S B L Interest Margin",
        "label": "Measurement Input S B L Interest Margin [Member]",
        "terseLabel": "S B L interest margin"
       }
      }
     },
     "localname": "MeasurementInputSBLInterestMarginMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_MeasurementInputTSpreadMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement Input T Spread",
        "label": "Measurement Input T Spread [Member]",
        "terseLabel": "T spread"
       }
      }
     },
     "localname": "MeasurementInputTSpreadMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_NTALifeEnterprisesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "NTA Life Enterprises [Member]",
        "label": "NTA Life Enterprises [Member]",
        "terseLabel": "NTA"
       }
      }
     },
     "localname": "NTALifeEnterprisesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_NationalTeachersAssociatesLifeInsuranceCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "National Teachers Associates Life Insurance Company [Member]",
        "label": "National Teachers Associates Life Insurance Company [Member]",
        "terseLabel": "NTA"
       }
      }
     },
     "localname": "NationalTeachersAssociatesLifeInsuranceCompanyMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_NumberOfHardToValueFixedMaturitySecurities": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number Of Hard To Value Fixed Maturity Securities",
        "label": "Number Of Hard To Value Fixed Maturity Securities",
        "terseLabel": "Number of hard-to-value fixed maturity securities"
       }
      }
     },
     "localname": "NumberOfHardToValueFixedMaturitySecurities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "hmn_NumberOfRetirementPlans": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number Of Retirement Plans",
        "label": "Number Of Retirement Plans",
        "terseLabel": "Number of retirement plans"
       }
      }
     },
     "localname": "NumberOfRetirementPlans",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "hmn_NumberOfSupplementalDefinedBenefitPlansFrozen": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number Of Supplemental Defined Benefit Plans Frozen",
        "label": "Number Of Supplemental Defined Benefit Plans Frozen",
        "terseLabel": "Number of supplemental defined benefit plans frozen"
       }
      }
     },
     "localname": "NumberOfSupplementalDefinedBenefitPlansFrozen",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "hmn_OffsettingAssetsAndLiabilityTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of offsetting asset and liability.",
        "label": "Offsetting Assets And Liability [Table Text Block]",
        "verboseLabel": "Offsetting assets and liability"
       }
      }
     },
     "localname": "OffsettingAssetsAndLiabilityTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_OperatingExpensesExcludingAmortizationOfIntangibleAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Operating Expenses Excluding Amortization Of Intangible Assets",
        "label": "Operating Expenses Excluding Amortization Of Intangible Assets",
        "verboseLabel": "Operating expenses"
       }
      }
     },
     "localname": "OperatingExpensesExcludingAmortizationOfIntangibleAssets",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParentBeforeCumulativeEffectOfChangeInAccountingPrinciple": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other Comprehensive Income (Loss), Available-For-Sale Securities Adjustment, Net Of Tax, Portion Attributable To Parent, Before Cumulative Effect Of Change In Accounting Principle",
        "label": "Other Comprehensive Income (Loss), Available-For-Sale Securities Adjustment, Net Of Tax, Portion Attributable To Parent, Before Cumulative Effect Of Change In Accounting Principle",
        "totalLabel": "Total, net of tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParentBeforeCumulativeEffectOfChangeInAccountingPrinciple",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherComprehensiveIncomeLossChangeInAccountingPrincipleAdjustmentNetOfTax": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": 3.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other Comprehensive Income (Loss), Change In Accounting Principle Adjustment, Net Of Tax",
        "label": "Other Comprehensive Income (Loss), Change In Accounting Principle Adjustment, Net Of Tax",
        "terseLabel": "Cumulative effect of change in accounting principle"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossChangeInAccountingPrincipleAdjustmentNetOfTax",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherIncludingUsTreasurySecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other including U.S treasury securities.",
        "label": "Other, including U.S. Treasury Securities [Member]",
        "verboseLabel": "Other, including U.S. Treasury securities"
       }
      }
     },
     "localname": "OtherIncludingUsTreasurySecuritiesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_OtherInvestmentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Investment [Member]",
        "terseLabel": "Other investments"
       }
      }
     },
     "localname": "OtherInvestmentMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_OtherPolicyHolderFundsPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for funds held that are returnable under terms of insurance contracts that were not separately reported, and amounts payable under Federal Home Loan Bank Funding agreements.",
        "label": "Other Policy holder Funds [Policy Text Block]",
        "verboseLabel": "Other Policyholder Funds"
       }
      }
     },
     "localname": "OtherPolicyHolderFundsPolicyTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_OtherPolicyholderFund": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The liability as of the balance sheet date for funds held that are returnable under terms of insurance contracts that were not separately reported, and amounts payable under Federal Home Loan Bank Funding agreements.",
        "label": "Other Policyholder Fund",
        "verboseLabel": "Other policyholder funds"
       }
      }
     },
     "localname": "OtherPolicyholderFund",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherPolicyholderFundsDerivativeInstrumentsCarryingAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount liability as of the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported.",
        "label": "Other Policyholder Funds Derivative Instruments Carrying Amount",
        "verboseLabel": "FIA - embedded derivatives, reported in Other policyholder funds"
       }
      }
     },
     "localname": "OtherPolicyholderFundsDerivativeInstrumentsCarryingAmount",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherPolicyholderFundsDerivativeInstrumentsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of the liability as of the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported.",
        "label": "Other Policyholder Funds Derivative Instruments Fair Value Disclosure",
        "terseLabel": "Other policyholder funds, embedded derivatives"
       }
      }
     },
     "localname": "OtherPolicyholderFundsDerivativeInstrumentsFairValueDisclosure",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherPolicyholderFundsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair Value of the liability as of the balance sheet date to the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported.",
        "label": "Other Policyholder Funds, Fair Value Disclosure",
        "verboseLabel": "Other policyholder funds"
       }
      }
     },
     "localname": "OtherPolicyholderFundsFairValueDisclosure",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_OtherPolicyholderFundsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other Policyholder Funds [Member]",
        "label": "Other Policyholder Funds [Member]",
        "terseLabel": "FIA - embedded derivatives, reported in Other policyholder funds"
       }
      }
     },
     "localname": "OtherPolicyholderFundsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_OtherShortDurationLinesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Short Duration Lines [Member]",
        "terseLabel": "Other short duration lines"
       }
      }
     },
     "localname": "OtherShortDurationLinesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_OtherThanShortDurationLineMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Than Short Duration Line [Member]",
        "terseLabel": "Insurance lines other than short duration"
       }
      }
     },
     "localname": "OtherThanShortDurationLineMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_OtherThanTemporaryImpairmentLossInvestmentsPortionRecognizedInEarningsChangeInIntent": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other than Temporary Impairment Loss, Investments, Portion Recognized In Earnings, Change In Intent",
        "label": "Other than Temporary Impairment Loss, Investments, Portion Recognized In Earnings, Change In Intent",
        "negatedLabel": "Change in intent write-downs"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossInvestmentsPortionRecognizedInEarningsChangeInIntent",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_PaymentsForProceedsFromAvailableforsaleSecuritiesEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Payments For (Proceeds From) Available-for-sale Securities, Equity Securities [Abstract]",
        "label": "Payments For (Proceeds From) Available-for-sale Securities, Equity Securities [Abstract]",
        "terseLabel": "Equity securities"
       }
      }
     },
     "localname": "PaymentsForProceedsFromAvailableforsaleSecuritiesEquitySecuritiesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_PaymentsForProceedsFromLimitedPartnershipInvestmentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Payments For Proceeds From Limited Partnership Investments [Abstract]",
        "label": "Payments For Proceeds From Limited Partnership Investments [Abstract]",
        "terseLabel": "Limited partnership interests"
       }
      }
     },
     "localname": "PaymentsForProceedsFromLimitedPartnershipInvestmentsAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_PercentageOfCoverageForCatastropheLossesAboveRetentionAmountScenarioOne": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of coverage for catastrophe losses above retention amount.",
        "label": "Percentage Of Coverage For Catastrophe Losses Above Retention Amount, Scenario One",
        "terseLabel": "Percentage of coverage for catastrophe losses above retention amount, layer one"
       }
      }
     },
     "localname": "PercentageOfCoverageForCatastropheLossesAboveRetentionAmountScenarioOne",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageOfInvestedAssetsInTotalInvestmentPortfolioLevel3Recurring": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of invested assets in the total investment portfolio in Level 3 carried at fair value on a recurring basis.",
        "label": "Percentage Of Invested Assets In Total Investment Portfolio Level3 Recurring",
        "terseLabel": "Percentage of invested assets in total investment portfolio Level 3 recurring"
       }
      }
     },
     "localname": "PercentageOfInvestedAssetsInTotalInvestmentPortfolioLevel3Recurring",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageOfInvestmentPortfolioFairValuePricingServicesOrIndexPrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of investment portfolio fair value pricing services or index price.",
        "label": "Percentage Of Investment Portfolio Fair Value Pricing Services Or Index Price",
        "terseLabel": "Percentage of investment portfolio fair value pricing services or index price"
       }
      }
     },
     "localname": "PercentageOfInvestmentPortfolioFairValuePricingServicesOrIndexPrice",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageOfLifeReinsuredCatastropheRiskInExcessSpecifiedRetentionPerOccurrenceAmount": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount.",
        "label": "Percentage of Life Reinsured Catastrophe Risk In Excess Specified Retention Per Occurrence Amount",
        "verboseLabel": "Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount"
       }
      }
     },
     "localname": "PercentageOfLifeReinsuredCatastropheRiskInExcessSpecifiedRetentionPerOccurrenceAmount",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageOfLossesIncurred": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percentage of losses represented by auto liability and auto physical damage.",
        "label": "Percentage of Losses Incurred",
        "terseLabel": "Percentage of losses incurred"
       }
      }
     },
     "localname": "PercentageOfLossesIncurred",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageOfReversionToMeanApproachUtilizedToAmortizePolicyAcquisitionCosts": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the variable deposit portion of the annuity segment, percentage of reversion to the mean approach utilized to amortize policy acquisition costs.",
        "label": "Percentage Of Reversion To Mean Approach Utilized To Amortize Policy Acquisition Costs",
        "terseLabel": "Percentage of reversion to mean approach utilized to amortized policy acquisition costs"
       }
      }
     },
     "localname": "PercentageOfReversionToMeanApproachUtilizedToAmortizePolicyAcquisitionCosts",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_PercentageofTotalFairValueAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of Total Fair Value [Abstract]",
        "label": "Percentage of Total Fair Value [Abstract]",
        "terseLabel": "Percent of Total Fair Value"
       }
      }
     },
     "localname": "PercentageofTotalFairValueAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_PolicyLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate amount of policy reserves (provided for future obligations including unpaid claims and claims adjustment expenses), policy benefits (liability for future policy benefits) and unearned premiums as of the balance sheet date.",
        "label": "Total policy liabilities",
        "totalLabel": "Total policy liabilities"
       }
      }
     },
     "localname": "PolicyLiabilities",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_PolicyLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Policy liabilities.",
        "label": "Policy liabilities",
        "verboseLabel": "Policy liabilities"
       }
      }
     },
     "localname": "PolicyLiabilitiesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_PotentialVariabilityOfPropertyAndCasualtyLossReserves": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Potential percentage variability (plus or minus) of property and casualty loss reserves within a reasonable probability of other possible outcomes.",
        "label": "Potential Variability Of Property and Casualty Loss Reserves",
        "terseLabel": "Potential variability of property and casualty loss reserves"
       }
      }
     },
     "localname": "PotentialVariabilityOfPropertyAndCasualtyLossReserves",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_ProbabilityOfOtherPossibleOutcomesPossibleImpactOnNetIncome": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equated Net Income impact (plus or minus) of potential percentage variability (plus or minus) of property and casualty loss reserves within a reasonable probability of other possible outcomes.",
        "label": "Probability Of Other Possible Outcomes Possible Impact On Net Income",
        "terseLabel": "Probability of other possible outcomes possible impact on net income"
       }
      }
     },
     "localname": "ProbabilityOfOtherPossibleOutcomesPossibleImpactOnNetIncome",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ProceedsFromCOVIDReliefAdvance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds From COVID Relief Advance",
        "label": "Proceeds From COVID Relief Advance",
        "terseLabel": "Proceeds from COVID relief advance"
       }
      }
     },
     "localname": "ProceedsFromCOVIDReliefAdvance",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ProceedsFromFHLBFundingAgreements": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds From FHLB Funding Agreements",
        "label": "Proceeds From FHLB Funding Agreements",
        "terseLabel": "Proceeds from FHLB funding agreements"
       }
      }
     },
     "localname": "ProceedsFromFHLBFundingAgreements",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ProceedsFromSaleAndMaturityOfMarketableSecuritiesExcludingFHLBRepayments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds From Sale And Maturity Of Marketable Securities (Excluding FHLB Repayments)",
        "label": "Proceeds From Sale And Maturity Of Marketable Securities (Excluding FHLB Repayments)",
        "terseLabel": "Proceeds received"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfMarketableSecuritiesExcludingFHLBRepayments",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ProductandCasualtyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Product and Casualty [Member]",
        "label": "Product and Casualty [Member]",
        "terseLabel": "Property and Casualty",
        "verboseLabel": "Property and Casualty segment"
       }
      }
     },
     "localname": "ProductandCasualtyMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_PropertyLiabilityAndCasualtyInsuranceReinsuranceCompaniesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Property Liability and Casualty Insurance Reinsurance Companies [Member]",
        "verboseLabel": "Reinsurance companies"
       }
      }
     },
     "localname": "PropertyLiabilityAndCasualtyInsuranceReinsuranceCompaniesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_PropertyLiabilityAndCasualtyInsuranceStateInsuranceFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Property Liability and Casualty Insurance State Insurance Facilities [Member]",
        "verboseLabel": "State insurance facilities"
       }
      }
     },
     "localname": "PropertyLiabilityAndCasualtyInsuranceStateInsuranceFacilitiesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_RealEstatePropertyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Real Estate Property [Member]",
        "terseLabel": "Real estate property"
       }
      }
     },
     "localname": "RealEstatePropertyMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ReinsuranceAssumedfromOtherCompaniesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance, Assumed from Other Companies [Abstract]",
        "label": "Reinsurance, Assumed from Other Companies [Abstract]",
        "terseLabel": "Assumed from Other Companies"
       }
      }
     },
     "localname": "ReinsuranceAssumedfromOtherCompaniesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuranceCededtoOtherCompaniesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance, Ceded to Other Companies [Abstract]",
        "label": "Reinsurance, Ceded to Other Companies [Abstract]",
        "terseLabel": "Ceded to Other Companies"
       }
      }
     },
     "localname": "ReinsuranceCededtoOtherCompaniesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuranceContractModifiedCoinsuranceBasisMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance Contract Modified Coinsurance Basis [Member]",
        "label": "Reinsurance Contract Modified Coinsurance Basis [Member]",
        "terseLabel": "Reinsurance Contract Modified Coinsurance Basis"
       }
      }
     },
     "localname": "ReinsuranceContractModifiedCoinsuranceBasisMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ReinsuranceDepositReceivableMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance Deposit Receivable [Member]",
        "label": "Reinsurance Deposit Receivable [Member]",
        "terseLabel": "Reinsurance Deposit Receivable"
       }
      }
     },
     "localname": "ReinsuranceDepositReceivableMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ReinsuranceDepositReceivableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance Deposit Receivable [Text Block]",
        "label": "Reinsurance Deposit Receivable [Text Block]",
        "terseLabel": "Deposit Asset on Reinsurance"
       }
      }
     },
     "localname": "ReinsuranceDepositReceivableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsurance"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ReinsuranceGrossAmountsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance, Gross Amounts [Abstract]",
        "label": "Reinsurance, Gross Amounts [Abstract]",
        "terseLabel": "Gross Amount"
       }
      }
     },
     "localname": "ReinsuranceGrossAmountsAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuranceNetAmountAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsurance, Net Amount [Abstract]",
        "label": "Reinsurance, Net Amount [Abstract]",
        "terseLabel": "Net Amount"
       }
      }
     },
     "localname": "ReinsuranceNetAmountAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuranceRecoverableOnUnpaidInsuranceReservesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]",
        "terseLabel": "Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]"
       }
      }
     },
     "localname": "ReinsuranceRecoverableOnUnpaidInsuranceReservesLineItems",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuranceRecoverableOnUnpaidInsuranceReservesTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Reinsurance Recoverable On Unpaid Insurance Reserves [Table]",
        "terseLabel": "Reinsurance Recoverable On Unpaid Insurance Reserves [Table]"
       }
      }
     },
     "localname": "ReinsuranceRecoverableOnUnpaidInsuranceReservesTable",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ReinsuredAmountOfEachLossAboveRetentionInClashEvent": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reinsured amount of each loss above retention in clash event.",
        "label": "Reinsured Amount Of Each Loss Above Retention In Clash Event",
        "terseLabel": "Reinsured amount of each loss above retention in clash event"
       }
      }
     },
     "localname": "ReinsuredAmountOfEachLossAboveRetentionInClashEvent",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionAmountOfEachLiabilityLossPerOccurrence": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention amount of each liability coverage loss per occurrence.",
        "label": "Retention Amount Of Each Liability Loss Per Occurrence",
        "verboseLabel": "Liability coverages, Company reinsured each loss above a retention per occurrence"
       }
      }
     },
     "localname": "RetentionAmountOfEachLiabilityLossPerOccurrence",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionAmountOfEachPropertyLossPerOccurrence": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention amount of each property coverage loss per occurrence.",
        "label": "Retention Amount Of Each Property Loss Per Occurrence",
        "verboseLabel": "Retention amount of each property loss per occurrence"
       }
      }
     },
     "localname": "RetentionAmountOfEachPropertyLossPerOccurrence",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionAmountPerOccurrenceRelatedToCatastropheLossesScenarioOne": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention amount per occurrence related to catastrophe losses.",
        "label": "Retention Amount Per Occurrence Related To Catastrophe Losses, Scenario One",
        "terseLabel": "Retention amount per occurrence related to catastrophe losses, layer one"
       }
      }
     },
     "localname": "RetentionAmountPerOccurrenceRelatedToCatastropheLossesScenarioOne",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionBaseAmountPerOccurrenceUnderLayerOne": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention base amount per occurrence under layer one.",
        "label": "Retention Base Amount Per Occurrence Under Layer One",
        "terseLabel": "Retention base amount per occurrence under layer one"
       }
      }
     },
     "localname": "RetentionBaseAmountPerOccurrenceUnderLayerOne",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionBaseAmountPerOccurrenceUnderLayerThree": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention base amount per occurrence under layer three.",
        "label": "Retention Base Amount Per Occurrence Under Layer Three",
        "terseLabel": "Retention base amount per occurrence under layer three"
       }
      }
     },
     "localname": "RetentionBaseAmountPerOccurrenceUnderLayerThree",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetentionBaseAmountPerOccurrenceUnderLayerTwo": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Retention base amount per occurrence under layer two.",
        "label": "Retention Base Amount Per Occurrence Under Layer Two",
        "terseLabel": "Retention base amount per occurrence under layer two"
       }
      }
     },
     "localname": "RetentionBaseAmountPerOccurrenceUnderLayerTwo",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_RetirementAnnuityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Retirement annuity [Member]",
        "terseLabel": "Retirement"
       }
      }
     },
     "localname": "RetirementAnnuityMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_RetirementMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Retirement [Member]",
        "terseLabel": "Retirement"
       }
      }
     },
     "localname": "RetirementMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ScheduleOfFHLBFundingAgreementsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule Of FHLB Funding Agreements",
        "label": "Schedule Of FHLB Funding Agreements [Table Text Block]",
        "terseLabel": "Schedule of FHLB funding agreements"
       }
      }
     },
     "localname": "ScheduleOfFHLBFundingAgreementsTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnNonrecurringBasisTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value, fair value and fair value hierarchy of financial assets and financial liabilities not carried at fair value, are measured on a nonrecurring basis, and fair value disclosure is required.",
        "label": "Schedule Of Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Table Text Block]",
        "verboseLabel": "Summary of fair value assets and liabilities measured on nonrecurring basis"
       }
      }
     },
     "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnNonrecurringBasisTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of income tax assets liabilities.",
        "label": "Schedule Of Income Tax Assets Liabilities [Table Text Block]",
        "verboseLabel": "Summary of income tax assets and liabilities"
       }
      }
     },
     "localname": "ScheduleOfIncomeTaxAssetsLiabilitiesTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ScheduleOfReconciliationOfNetIncurredAndPaidClaimsDevelopmentToLiabilityForClaimsAndClaimAdjustmentExpensesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure for reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expenses.",
        "label": "Schedule of Reconciliation of Net Incurred and Paid Claims Development To Liability for Claims and Claim Adjustment Expenses [Table Text Block]",
        "verboseLabel": "Schedule of reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expenses"
       }
      }
     },
     "localname": "ScheduleOfReconciliationOfNetIncurredAndPaidClaimsDevelopmentToLiabilityForClaimsAndClaimAdjustmentExpensesTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of reinsurance recoverable on reserves.",
        "label": "Schedule Of Reinsurance Recoverable On Reserves [Table Text Block]",
        "verboseLabel": "Summary of reinsurance recoverable on unpaid insurance reserves"
       }
      }
     },
     "localname": "ScheduleOfReinsuranceRecoverableOnReservesTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceAchievementInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustment For Performance Achievement In Period",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustment For Performance Achievement In Period",
        "terseLabel": "Adjustment for performance achievement, Total Outstanding Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceAchievementInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceAchievementInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustment For Performance Achievement In Period Weighted Average Grant Date Fair Value",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustment For Performance Achievement In Period Weighted Average Grant Date Fair Value",
        "terseLabel": "Adjustment for performance achievement, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceAchievementInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options distributed in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Distributed In Period",
        "negatedLabel": "Distributed, Total Outstanding Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options distributed weighted average grant date fair value.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Distributed Weighted Average Grant Date Fair Value",
        "verboseLabel": "Distributed, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedForfeitedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Forfeited Forfeited In Period",
        "negatedLabel": "Forfeited, Vested, Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedForfeitedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedVestedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited Vested In Period Weighted Average Grant Date Fair Value",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Forfeited Vested In Period Weighted Average Grant Date Fair value",
        "verboseLabel": "Forfeited, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedVestedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period.",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Granted In Period",
        "verboseLabel": "Granted, Vested, Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedVestedInPeriodWeightedAverageAdjustmentForPerformanceAchievementDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Granted Vested In Period Weighted Average Adjustment For Performance Achievement Date Fair Value",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Granted Vested In Period Weighted Average Adjustment For Performance Achievement Date Fair Value",
        "terseLabel": "Adjustment for performance achievement, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedVestedInPeriodWeightedAverageAdjustmentForPerformanceAchievementDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedVestedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted Vested In Period Weighted Average Grant Date Fair Value.",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Options Granted Vested In Period Weighted Average Grant Date Fair value",
        "terseLabel": "Granted, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedVestedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedDistributedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested distributed in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Distributed In Period",
        "negatedLabel": "Distributed, Vested, Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedDistributedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedDistributedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested distributed in period weighted average grant date fair value.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Distributed In Period, Weighted Average Grant Date Fair Value",
        "verboseLabel": "Distributed, Vested, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedDistributedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested number.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Number",
        "periodEndLabel": "Ending balance, Vested, Units (in shares)",
        "periodStartLabel": "Beginning balance, Vested, Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumber",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedVestedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Vested In Period",
        "terseLabel": "Vested, Vested, Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedVestedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedVestedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested in period weighted average grant date fair value.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Vested In Period Weighted Average Grant Date Fair Value",
        "verboseLabel": "Vested, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedVestedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vested weighted average grant date fair value.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Weighted Average Grant Date Fair Value",
        "periodEndLabel": "Ending balance, Vested, Weighted Average Grant Date Fair Value per Unit (in usd per share)",
        "periodStartLabel": "Beginning balance, Vested, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExercisedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable exercised in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Exercised In Period",
        "negatedLabel": "Options Vested and Exercisable, Exercisable (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExercisedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExpiredInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable expired in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Expired In Period",
        "negatedLabel": "Options Vested and Exercisable, Expired (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExpiredInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableForfeitedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable forfeited in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Forfeited In Period",
        "negatedLabel": "Options Vested and Exercisable, Forfeited (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableForfeitedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableGrantedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Granted In Period.",
        "label": "Share based Compensation Arrangement By Share based Payment Award Options Vested And Exercisable Granted In Period",
        "verboseLabel": "Options Vested and Exercisable, Granted (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableGrantedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableOutstandingNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable outstanding number.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Outstanding Number",
        "periodEndLabel": "Options Vested and Exercisable, Ending Balance (in shares)",
        "periodStartLabel": "Options Vested and Exercisable, Beginning Balance (in shares)",
        "verboseLabel": "Vested and Exercisable Options (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableOutstandingNumber",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableVestedInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable vested in period.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Vested In Period",
        "verboseLabel": "Options Vested and Exercisable, Vested (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableVestedInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable weighted average exercise price.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Weighted Average Exercise Price",
        "terseLabel": "Weighted average exercise prices of vested and exercisable options (in usd per share)",
        "verboseLabel": "Vested and Exercisable Options, Weighted Average Option Price per Share (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableWeightedAverageExercisePrice",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableWeightedAverageRemainingContractualTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award options vested and exercisable weighted average remaining contractual term.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Weighted Average Remaining Contractual Term",
        "verboseLabel": "Vested and Exercisable Options, Weighted Average Remaining Term"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableWeightedAverageRemainingContractualTerm",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstanding": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment awards equity instruments outstanding.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Awards Equity Instruments Outstanding",
        "totalLabel": "Total (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstanding",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstandingTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table of share based compensation arrangement by share based payment awards equity instruments outstanding, shown as a text block.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Awards Equity Instruments Outstanding [Table Text Block]",
        "verboseLabel": "Summary of stock units and stock options outstanding under the comprehensive Plan"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstandingTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation arrangements by share based payment award options vested in period weighted average exercise price.",
        "label": "Share Based Compensation Arrangements By Share Based Payment Award Options Vested In Period Weighted Average Exercise Price",
        "verboseLabel": "Weighted Average Option Price per Share, Options Vested (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationSharesExercisedUnderStockOptionPlansExercisePriceRange": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation shares exercised under stock option plans exercise price range.",
        "label": "Share Based Compensation Shares Exercised Under Stock Option Plans Exercise Price Range",
        "verboseLabel": "Range of Option Prices per Share, Exercised (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesExercisedUnderStockOptionPlansExercisePriceRange",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationSharesExpiredUnderStockOptionPlansExercisePriceRange": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation shares expired under stock option plans exercise price range.",
        "label": "Share Based Compensation Shares Expired Under Stock Option Plans Exercise Price Range",
        "verboseLabel": "Range of Option Prices per Share, Expired (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesExpiredUnderStockOptionPlansExercisePriceRange",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationSharesForfeitedUnderStockOptionPlansExercisePriceRange": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation shares forfeited under stock option plans exercise price range.",
        "label": "Share Based Compensation Shares Forfeited Under Stock Option Plans Exercise Price Range",
        "verboseLabel": "Range of Option Prices per Share, Forfeited (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesForfeitedUnderStockOptionPlansExercisePriceRange",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationSharesGrantedUnderStockOptionPlansExercisePriceRange": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation shares granted under stock option plans exercise price range.",
        "label": "Share Based Compensation Shares Granted Under Stock Option Plans Exercise Price Range",
        "verboseLabel": "Range of Option Prices per Share, Granted (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesGrantedUnderStockOptionPlansExercisePriceRange",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationSharesVestedUnderStockOptionPlansExercisePriceRange": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based compensation shares vested under stock option plans exercise price range.",
        "label": "Share Based Compensation Shares Vested Under Stock Option Plans Exercise Price Range",
        "verboseLabel": "Range of Option Prices per Share, Vested (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesVestedUnderStockOptionPlansExercisePriceRange",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "hmn_ShareBasedCompensationStockOptionActivitiesByExerciseRangeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share Based Compensation Stock Option Activities By Exercise Range [Abstract]",
        "verboseLabel": "Summary of options outstanding segregated by ranges of exercise prices"
       }
      }
     },
     "localname": "ShareBasedCompensationStockOptionActivitiesByExerciseRangeAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ShareBasedCompensationStockOptionOutstandingByExerciseRangeTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table of share based compensation stock option outstanding by exercise range, shown as a text block.",
        "label": "Share Based Compensation Stock Option Outstanding By Exercise Range [Table Text Block]",
        "verboseLabel": "Summary of options outstanding segregated by ranges of exercise prices"
       }
      }
     },
     "localname": "ShareBasedCompensationStockOptionOutstandingByExerciseRangeTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanAdjustmentForPerformanceAchievementOptionsInPeriod": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Adjustment For Performance Achievement Options In Period",
        "label": "Share based Compensation Arrangement By Share based Payment Award Equity Instruments Other Than Adjustment For Performance Achievement Options In Period",
        "terseLabel": "Adjustment for performance achievement, Units (in shares)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanAdjustmentForPerformanceAchievementOptionsInPeriod",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "hmn_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedNumberofSharesRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Number of Shares [Roll Forward]",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Number of Shares [Roll Forward]",
        "terseLabel": "Vested\u00a0Units"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedNumberofSharesRollForward",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedWeightedAverageGrantDateFairValueRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Weighted Average Grant Date Fair Value [Roll Forward]",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Weighted Average Grant Date Fair Value [Roll Forward]",
        "terseLabel": "Vested Units, Weighted Average Grant Date Fair Value per Unit"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedWeightedAverageGrantDateFairValueRollForward",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExercisableRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Exercisable [Roll Forward]",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Exercisable [Roll Forward]",
        "terseLabel": "Vested and Exercisable"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExercisableRollForward",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ShortDurationInsuranceContractsIncurredButNotReportedIBNRClaimsLiabilityPlusExpectedDevelopmentOnReportedClaimsNet": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Short-duration Insurance Contracts, Incurred But Not Reported (IBNR) Claims Liability Plus Expected Development On Reported Claims, Net",
        "label": "Short-duration Insurance Contracts, Incurred But Not Reported (IBNR) Claims Liability Plus Expected Development On Reported Claims, Net",
        "terseLabel": "Total of Incurred- But-Not-Reported Liabilities Plus Expected Development on Reported Claims"
       }
      }
     },
     "localname": "ShortDurationInsuranceContractsIncurredButNotReportedIBNRClaimsLiabilityPlusExpectedDevelopmentOnReportedClaimsNet",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ShortTailCoverageReservesAsAPercentageOfTotalReserves": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Short Tail Coverage Reserves As A Percentage Of Total Reserves.",
        "label": "Short Tail Coverage Reserves As A Percentage Of Total Reserves.",
        "terseLabel": "Short tail coverage reserves as a percentage of total reserves"
       }
      }
     },
     "localname": "ShortTailCoverageReservesAsAPercentageOfTotalReserves",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_ShortTermAndOtherInvestments": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Short-Term And Other Investments",
        "label": "Short-Term And Other Investments",
        "terseLabel": "Short-term and other investments"
       }
      }
     },
     "localname": "ShortTermAndOtherInvestments",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ShortTermAndOtherInvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Short Term And Other Investments [Member]",
        "terseLabel": "Short-term and other investments",
        "verboseLabel": "Derivatives, reported in Short-term and other investments"
       }
      }
     },
     "localname": "ShortTermAndOtherInvestmentsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ShorttermInvestmentsFundsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Short-term Investments Funds [Member]",
        "terseLabel": "Short-term investment funds"
       }
      }
     },
     "localname": "ShorttermInvestmentsFundsMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_SocieteGeneraleMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Societe Generale [Member]",
        "terseLabel": "Societe Generale"
       }
      }
     },
     "localname": "SocieteGeneraleMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_StatutoryAccountingPracticesRestrictedNetAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Statutory accounting practices restricted net assets.",
        "label": "Statutory Accounting Practices Restricted Net Assets",
        "verboseLabel": "Restricted net assets of HMEC's insurance subsidiaries"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesRestrictedNetAssets",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Statutory surplus and subsidiary dividend restrictions.",
        "label": "Statutory Surplus And Subsidiary Dividend Restrictions [Text Block]",
        "verboseLabel": "Statutory Information and Dividend Restrictions"
       }
      }
     },
     "localname": "StatutorySurplusAndSubsidiaryDividendRestrictionsTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictions"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_StockIssuedDuringPeriodValueConversionOfRestrictedStockUnits": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of the stock issued during the period as a result of the conversion of restricted stock units which represented share based compensation.",
        "label": "Stock Issued During Period, Value, Conversion Of Restricted Stock Units",
        "verboseLabel": "Conversion of restricted common stock units"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueConversionOfRestrictedStockUnits",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_SummaryOfGuaranteedMinimumDeathBenefitTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Summary of guaranteed minimum death benefit.",
        "label": "Summary Of Guaranteed Minimum Death Benefit [Table Text Block]",
        "verboseLabel": "Summary of guaranteed minimum death benefit"
       }
      }
     },
     "localname": "SummaryOfGuaranteedMinimumDeathBenefitTableTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_SummaryOfReinsuranceRecoverableOnUnpaidInsuranceReservesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Summary of reinsurance recoverable on unpaid insurance reserves [Abstract]",
        "verboseLabel": "Summary of reinsurance recoverable on unpaid insurance reserves"
       }
      }
     },
     "localname": "SummaryOfReinsuranceRecoverableOnUnpaidInsuranceReservesAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_SummaryOfStockOptionActivityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Summary Of Stock Option Activity [Abstract]",
        "verboseLabel": "Summary of changes in outstanding options"
       }
      }
     },
     "localname": "SummaryOfStockOptionActivityAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_SupplementalMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Supplemental [Member]",
        "label": "Supplemental [Member]",
        "terseLabel": "Supplemental",
        "verboseLabel": "Supplemental"
       }
      }
     },
     "localname": "SupplementalMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Supplementary insurance information for insurance companies disclosure and schedule of supplemental information for property casualty insurance underwriters.",
        "label": "Supplementary Insurance Information For Insurance Companies Disclosure And Schedule Of Supplemental Information For Property Casualty Insurance Underwriters [Text Block]",
        "verboseLabel": "Schedule III and VI Supplementary Insurance Information Supplemental Information Concerning Property and Casualty Insurance Operations"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureAndScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperations"
     ],
     "xbrltype": "textBlockItemType"
    },
    "hmn_TreasuryStockPercentageofOutstandingSharesReacquired": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Treasury Stock, Percentage of Outstanding Shares Reacquired",
        "label": "Treasury Stock, Percentage of Outstanding Shares Reacquired",
        "terseLabel": "Percentage of outstanding shares reacquired"
       }
      }
     },
     "localname": "TreasuryStockPercentageofOutstandingSharesReacquired",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_TwoThousandFifteenEquityIncentivePlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Two Thousand Fifteen Equity Incentive Plan [Member]",
        "verboseLabel": "2015 Plan"
       }
      }
     },
     "localname": "TwoThousandFifteenEquityIncentivePlanMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_TwoThousandTenComprehensiveExecutiveCompensationPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Two Thousand Ten Comprehensive Executive Compensation Plan [Member]",
        "verboseLabel": "Comprehensive Plan"
       }
      }
     },
     "localname": "TwoThousandTenComprehensiveExecutiveCompensationPlanMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_UsGovernmentAndFederallySponsoredAgencyObligationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "U.S. government and federally sponsored agency obligations.",
        "label": "U.S. government and federally sponsored agency obligations:",
        "verboseLabel": "U.S. Government and federally sponsored agency obligations:"
       }
      }
     },
     "localname": "UsGovernmentAndFederallySponsoredAgencyObligationsAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_ValuationTechniqueBlackScholesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation Technique Black Scholes",
        "label": "Valuation Technique Black Scholes [Member]",
        "terseLabel": "Black-Scholes"
       }
      }
     },
     "localname": "ValuationTechniqueBlackScholesMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_ValueOfDistributionAcquired": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value Of Distribution Acquired",
        "label": "Value Of Distribution Acquired",
        "terseLabel": "Value of distribution acquired"
       }
      }
     },
     "localname": "ValueOfDistributionAcquired",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ValueofAgencyRelationship": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of Agency Relationship",
        "label": "Value of Agency Relationship",
        "terseLabel": "Value of agency relationship"
       }
      }
     },
     "localname": "ValueofAgencyRelationship",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_ValueofCustomerRelationship": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of Customer Relationship",
        "label": "Value of Customer Relationship",
        "terseLabel": "Value of customer relationship"
       }
      }
     },
     "localname": "ValueofCustomerRelationship",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "hmn_VariableAnnuityContractValueDistributionBasedOnGuaranteedMinimumDeathBenefitPlanAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Variable Annuity Contract Value Distribution Based On Guaranteed Minimum Death Benefit Plan [Abstract]",
        "verboseLabel": "Variable annuity contract value distribution based on GMDB feature:"
       }
      }
     },
     "localname": "VariableAnnuityContractValueDistributionBasedOnGuaranteedMinimumDeathBenefitPlanAbstract",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "hmn_VariableAnnuityContractValueDistributionGuaranteeOfPremiumRollUpAnnualInterestRate": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails": {
       "order": 3.0,
       "parentTag": "hmn_VariableAnnuityContractValueDistributionPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable annuity contract value distribution guarantee of premium roll up annual interest rate.",
        "label": "Variable Annuity Contract Value Distribution Guarantee Of Premium Roll Up Annual Interest Rate",
        "verboseLabel": "Guarantee of premium roll-up at an annual rate of 3% or 5%"
       }
      }
     },
     "localname": "VariableAnnuityContractValueDistributionGuaranteeOfPremiumRollUpAnnualInterestRate",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_VariableAnnuityContractValueDistributionNoGuaranteePercent": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails": {
       "order": 1.0,
       "parentTag": "hmn_VariableAnnuityContractValueDistributionPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable annuity contract value distribution no guarantee percent.",
        "label": "Variable Annuity Contract Value Distribution No Guarantee Percent",
        "verboseLabel": "No guarantee"
       }
      }
     },
     "localname": "VariableAnnuityContractValueDistributionNoGuaranteePercent",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_VariableAnnuityContractValueDistributionPercent": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable annuity contract value distribution percent.",
        "label": "Variable Annuity Contract Value Distribution Percent",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "VariableAnnuityContractValueDistributionPercent",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_VariableAnnuityContractValueDistributionReturnOfPremiumGuaranteePercent": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails": {
       "order": 2.0,
       "parentTag": "hmn_VariableAnnuityContractValueDistributionPercent",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable annuity contract value distribution return of premium guarantee percent.",
        "label": "Variable Annuity Contract Value Distribution Return Of Premium Guarantee Percent",
        "verboseLabel": "Return of premium guarantee"
       }
      }
     },
     "localname": "VariableAnnuityContractValueDistributionReturnOfPremiumGuaranteePercent",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "hmn_VendorPriceMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Vendor Price",
        "label": "Vendor Price [Member]",
        "terseLabel": "vendor price"
       }
      }
     },
     "localname": "VendorPriceMember",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "hmn_WeightedAverageFairValueOfNonvestedOptionsOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average fair value of nonvested options outstanding.",
        "label": "Weighted Average Fair Value Of Nonvested Options Outstanding",
        "terseLabel": "Weighted average fair value of nonvested options outstanding (in usd per share)"
       }
      }
     },
     "localname": "WeightedAverageFairValueOfNonvestedOptionsOutstanding",
     "nsuri": "http://www.horacemann.com/20201231",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Condensed Financial Information Disclosure [Abstract]",
        "terseLabel": "Condensed Financial Information Disclosure [Abstract]"
       }
      }
     },
     "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "srt_CondensedFinancialStatementsCaptionsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Condensed Financial Statements, Captions [Line Items]",
        "terseLabel": "Condensed Financial Statements, Captions [Line Items]"
       }
      }
     },
     "localname": "CondensedFinancialStatementsCaptionsLineItems",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidatedEntitiesAxis": {
     "auth_ref": [
      "r513",
      "r514",
      "r518",
      "r519",
      "r850",
      "r860"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by consolidated entity or group of entities.",
        "label": "Consolidated Entities [Axis]",
        "terseLabel": "Consolidated Entities [Axis]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidatedEntitiesDomain": {
     "auth_ref": [
      "r513",
      "r514",
      "r518",
      "r519"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Entity or group of entities consolidated into reporting entity.",
        "label": "Consolidated Entities [Domain]",
        "terseLabel": "Consolidated Entities [Domain]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidationEliminationsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eliminating entries used in consolidating a parent entity and its subsidiaries.",
        "label": "Consolidation, Eliminations [Member]",
        "terseLabel": "Eliminations"
       }
      }
     },
     "localname": "ConsolidationEliminationsMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidationItemsAxis": {
     "auth_ref": [
      "r173",
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r193",
      "r197"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by components, eliminations, non-segment corporate-level activity and reconciling items used in consolidating a parent entity and its subsidiaries or its operating segments.",
        "label": "Consolidation Items [Axis]",
        "terseLabel": "Consolidation Items [Axis]"
       }
      }
     },
     "localname": "ConsolidationItemsAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidationItemsDomain": {
     "auth_ref": [
      "r173",
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r193",
      "r197"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components, elimination, non-segment corporate-level activity and reconciling items used in consolidating a parent entity and its subsidiaries or its operating segments.",
        "label": "Consolidation Items [Domain]",
        "terseLabel": "Consolidation Items [Domain]"
       }
      }
     },
     "localname": "ConsolidationItemsDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CounterpartyNameAxis": {
     "auth_ref": [
      "r44",
      "r120",
      "r870"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of counterparty. A counterparty is the other party that participates in a financial transaction. Examples include, but not limited to, the name of the financial institution.",
        "label": "Counterparty Name [Axis]",
        "terseLabel": "Counterparty Name [Axis]"
       }
      }
     },
     "localname": "CounterpartyNameAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember": {
     "auth_ref": [
      "r131",
      "r138",
      "r240",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Increase (decrease) to financial statements for cumulative-effect adjustment in period of adoption of amendment to accounting standards.",
        "label": "Cumulative Effect, Period of Adoption, Adjustment [Member]",
        "terseLabel": "Cumulative effect of change in accounting principle"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAdjustmentMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAxis": {
     "auth_ref": [
      "r131",
      "r138",
      "r240",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by cumulative-effect adjustment to financial statements in period of adoption of amendment to accounting standards.",
        "label": "Cumulative Effect, Period of Adoption [Axis]",
        "terseLabel": "Cumulative Effect, Period of Adoption [Axis]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionDomain": {
     "auth_ref": [
      "r131",
      "r138",
      "r240",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cumulative-effect adjustment to financial statements in period of adoption of amendment to accounting standards.",
        "label": "Cumulative Effect, Period of Adoption [Domain]",
        "terseLabel": "Cumulative Effect, Period of Adoption [Domain]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis": {
     "auth_ref": [
      "r663"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by branch of Federal Home Loan Bank.",
        "label": "Federal Home Loan Bank Branch [Axis]",
        "terseLabel": "Federal Home Loan Bank Branch [Axis]"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Twelve regional cooperative banks that U.S. lending institutions use to finance housing and economic development in their communities.",
        "label": "Federal Home Loan Bank Branch [Domain]",
        "terseLabel": "Federal Home Loan Bank Branch [Domain]"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_LifeInsuranceInForceAssumed": {
     "auth_ref": [
      "r731",
      "r863"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of life insurance issued and outstanding assumed from other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Assumed",
        "terseLabel": "Assumed from Other Companies"
       }
      }
     },
     "localname": "LifeInsuranceInForceAssumed",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "srt_LifeInsuranceInForceCeded": {
     "auth_ref": [
      "r730",
      "r862"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of life insurance issued and outstanding ceded to other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Ceded",
        "verboseLabel": "Ceded to Other Companies"
       }
      }
     },
     "localname": "LifeInsuranceInForceCeded",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "srt_LifeInsuranceInForceGross": {
     "auth_ref": [
      "r729",
      "r861"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before effect of reinsurance, of life insurance issued and outstanding, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Gross",
        "verboseLabel": "Gross Amount"
       }
      }
     },
     "localname": "LifeInsuranceInForceGross",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "srt_LifeInsuranceInForceNet": {
     "auth_ref": [
      "r732",
      "r864"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effect of reinsurance, of life insurance issued and outstanding, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net",
        "terseLabel": "Net Amount"
       }
      }
     },
     "localname": "LifeInsuranceInForceNet",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "srt_LifeInsuranceInForceNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net [Abstract]",
        "terseLabel": "Life insurance in force"
       }
      }
     },
     "localname": "LifeInsuranceInForceNetAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_LifeInsuranceInForcePercentageAssumedToNet": {
     "auth_ref": [
      "r733",
      "r865"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of assumed life insurance contract issued and outstanding to life insurance contract issued and outstanding after effect of reinsurance, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Percentage Assumed to Net",
        "terseLabel": "Percentage of Amount Assumed to Net"
       }
      }
     },
     "localname": "LifeInsuranceInForcePercentageAssumedToNet",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r402",
      "r412",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r630",
      "r766",
      "r771"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Upper limit of the provided range.",
        "label": "Maximum [Member]",
        "terseLabel": "Maximum"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r402",
      "r412",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r630",
      "r766",
      "r771"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Lower limit of the provided range.",
        "label": "Minimum [Member]",
        "terseLabel": "Minimum"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ParentCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The registrant that controls, directly or indirectly, another entity (or entities). The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree.",
        "label": "Parent Company [Member]",
        "terseLabel": "Parent company"
       }
      }
     },
     "localname": "ParentCompanyMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r200",
      "r309",
      "r310",
      "r631",
      "r759",
      "r768"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by product and service, or group of similar products and similar services.",
        "label": "Product and Service [Axis]",
        "terseLabel": "Product and Service [Axis]"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [
      "r200",
      "r309",
      "r310",
      "r631",
      "r759",
      "r768"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Product or service, or a group of similar products or similar services.",
        "label": "Product and Service [Domain]",
        "terseLabel": "Product and Service [Domain]"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r338",
      "r402",
      "r412",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r630",
      "r766",
      "r771"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.",
        "label": "Statistical Measurement [Axis]",
        "terseLabel": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r338",
      "r402",
      "r412",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r630",
      "r766",
      "r771"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.",
        "label": "Statistical Measurement [Domain]",
        "terseLabel": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]",
        "terseLabel": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]"
       }
      }
     },
     "localname": "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable": {
     "auth_ref": [
      "r734",
      "r869"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of supplemental information about reinsurance including, but not limited to, type of insurance, gross amount of premium, premium ceded to another company, premium assumed from another company, net amount of premium revenue, and percentage of premium assumed to net premium revenue.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table]",
        "terseLabel": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table]"
       }
      }
     },
     "localname": "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RepurchaseAgreementCounterpartyNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Named other party that participates in a financial transaction. Examples include, but not limited to, the name of the financial institution.",
        "label": "Counterparty Name [Domain]",
        "terseLabel": "Counterparty Name [Domain]"
       }
      }
     },
     "localname": "RepurchaseAgreementCounterpartyNameDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ScheduleOfCondensedFinancialStatementsTable": {
     "auth_ref": [
      "r125",
      "r510",
      "r866",
      "r871",
      "r872",
      "r873"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about condensed financial statements, including, but not limited to, the balance sheet, income statement, and statement of cash flows.",
        "label": "Condensed Financial Statements [Table]",
        "terseLabel": "Condensed Financial Statements [Table]"
       }
      }
     },
     "localname": "ScheduleOfCondensedFinancialStatementsTable",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]",
        "terseLabel": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "srt_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesReportableDataLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]",
        "terseLabel": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesReportableDataLineItems",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable": {
     "auth_ref": [
      "r845",
      "r867"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about investment held by insurance company, excluding investment in related party.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table]",
        "terseLabel": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table]"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock": {
     "auth_ref": [
      "r845",
      "r867"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure of information about investment held by insurance company, excluding investment in related party.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Text Block]",
        "verboseLabel": "Summary of Investments-Other Than Investments in Related Parties"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedParties"
     ],
     "xbrltype": "textBlockItemType"
    },
    "srt_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]",
        "terseLabel": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]",
        "terseLabel": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]"
       }
      }
     },
     "localname": "SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "srt_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock": {
     "auth_ref": [
      "r734",
      "r869"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the supplemental schedule of reinsurance information. Reinsurance schedule includes, but is not limited to, the type of insurance, gross amount of premiums, premiums ceded to other entities, premiums assumed from other entities, net amount of premium revenue, and the percentage of the premiums assumed to net premium revenue.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Text Block]",
        "verboseLabel": "Schedule IV Reinsurance"
       }
      }
     },
     "localname": "SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsurance"
     ],
     "xbrltype": "textBlockItemType"
    },
    "srt_SupplementaryInsuranceInformationBySegmentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]",
        "terseLabel": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationBySegmentLineItems",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_SupplementaryInsuranceInformationBySegmentTable": {
     "auth_ref": [
      "r727",
      "r868"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about supplementary insurance information by segment. Includes, but is not limited to, deferred policy acquisition cost; future policy benefit, loss, claim and loss expenses; unearned premium; other policy claim and benefit payable; premium revenue; net investment income; benefit, claim, loss and settlement expenses; amortization of deferred policy acquisition cost; other operating expense; and premium written.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table]",
        "terseLabel": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table]"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationBySegmentTable",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_WeightedAverageMember": {
     "auth_ref": [
      "r605",
      "r607",
      "r610"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Average of a range of values, calculated with consideration of proportional relevance.",
        "label": "Weighted Average [Member]",
        "terseLabel": "Weighted Average"
       }
      }
     },
     "localname": "WeightedAverageMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AOCIAttributableToParentNetOfTaxRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "AOCI Attributable to Parent, Net of Tax [Roll Forward]",
        "terseLabel": "AOCI Attributable to Parent, Net of Tax [Roll Forward]"
       }
      }
     },
     "localname": "AOCIAttributableToParentNetOfTaxRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingStandardsUpdateExtensibleList": {
     "auth_ref": [
      "r132",
      "r133",
      "r134",
      "r135",
      "r237",
      "r238",
      "r239",
      "r240",
      "r241",
      "r242",
      "r449",
      "r450",
      "r451",
      "r452",
      "r453",
      "r454",
      "r455",
      "r456",
      "r488",
      "r489",
      "r773",
      "r774",
      "r775",
      "r776",
      "r777",
      "r778",
      "r779",
      "r780",
      "r781",
      "r782",
      "r783",
      "r784"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates amendment to accounting standards.",
        "label": "Accounting Standards Update [Extensible List]",
        "terseLabel": "Accounting Standards Update [Extensible List]"
       }
      }
     },
     "localname": "AccountingStandardsUpdateExtensibleList",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "extensibleListItemType"
    },
    "us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments": {
     "auth_ref": [
      "r107"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.",
        "label": "Accretion (Amortization) of Discounts and Premiums, Investments",
        "negatedLabel": "Amortization of premiums and accretion of discounts on fixed maturity securities, net"
       }
      }
     },
     "localname": "AccretionAmortizationOfDiscountsAndPremiumsInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": {
     "auth_ref": [
      "r53",
      "r60",
      "r63",
      "r517"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.",
        "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]",
        "terseLabel": "Net Funded Status of Benefit Plans"
       }
      }
     },
     "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": {
     "auth_ref": [
      "r26",
      "r283"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.",
        "label": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment",
        "verboseLabel": "Less: accumulated depreciation"
       }
      }
     },
     "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember": {
     "auth_ref": [
      "r48",
      "r49",
      "r51",
      "r60",
      "r63"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.",
        "label": "AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]",
        "verboseLabel": "Net unrealized investment gains (losses) on securities"
       }
      }
     },
     "localname": "AccumulatedNetUnrealizedInvestmentGainLossMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax",
        "terseLabel": "Net unrealized investment gains on fixed maturity securities",
        "verboseLabel": "Net unrealized investment gains on fixed maturity securities"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax": {
     "auth_ref": [
      "r54",
      "r60",
      "r359"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 5.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax",
        "negatedLabel": "Net funded status of benefit plans",
        "negatedTerseLabel": "Net funded status of benefit plans"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Accumulated Other Comprehensive Income (Loss) [Line Items]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Line Items]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]",
        "terseLabel": "Accumulated other comprehensive income (loss), net of tax:",
        "verboseLabel": "Accumulated other comprehensive income (loss), net of taxes:"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": {
     "auth_ref": [
      "r570",
      "r571",
      "r572",
      "r573",
      "r574",
      "r576"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).",
        "label": "Accumulated Other Comprehensive Income (Loss) [Table]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Table]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r56",
      "r60",
      "r63",
      "r128",
      "r129",
      "r130",
      "r517",
      "r775",
      "r776"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.",
        "label": "AOCI Attributable to Parent [Member]",
        "terseLabel": "Total",
        "verboseLabel": "Accumulated other comprehensive income (loss), net of tax:"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r17"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.",
        "label": "Additional Paid in Capital, Common Stock",
        "terseLabel": "Additional paid-in capital",
        "verboseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r453",
      "r454",
      "r455"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.",
        "label": "Additional Paid-in Capital [Member]",
        "verboseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionsToContractHoldersFunds": {
     "auth_ref": [
      "r94"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from a segregated fund account during the period.",
        "label": "Additions to Contract Holders Funds",
        "verboseLabel": "Deposits"
       }
      }
     },
     "localname": "AdditionsToContractHoldersFunds",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentForAmortizationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amortization [Abstract]",
        "verboseLabel": "Amortization of:"
       }
      }
     },
     "localname": "AdjustmentForAmortizationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": {
     "auth_ref": [
      "r414",
      "r416",
      "r459",
      "r460"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.",
        "label": "APIC, Share-based Payment Arrangement, Increase for Cost Recognition",
        "verboseLabel": "Share-based compensation expense"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllOtherCorporateBondsMember": {
     "auth_ref": [
      "r210"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments in corporate fixed maturity debt securities classified as other.",
        "label": "Other Corporate Bonds [Member]",
        "verboseLabel": "All other corporate bonds"
       }
      }
     },
     "localname": "AllOtherCorporateBondsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r416",
      "r445",
      "r458"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.",
        "label": "Share-based Payment Arrangement, Expense",
        "terseLabel": "Share-based compensation expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfIntangibleAssets": {
     "auth_ref": [
      "r106",
      "r268",
      "r275"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 5.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.",
        "label": "Amortization of Intangible Assets",
        "terseLabel": "Intangible asset amortization expense"
       }
      }
     },
     "localname": "AmortizationOfIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r151"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.",
        "label": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount",
        "terseLabel": "Antidilutive securities exclude from EPS computation (in shares)"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AssetBackedSecuritiesMember": {
     "auth_ref": [
      "r217",
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities that are primarily serviced by the cash flows of a discrete pool of receivables or other financial assets for example, but not limited to, credit card receivables, car loans, recreational vehicle loans, and mobile home loans.",
        "label": "Asset-backed Securities [Member]",
        "terseLabel": "Asset-backed securities"
       }
      }
     },
     "localname": "AssetBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r118",
      "r181",
      "r188",
      "r195",
      "r236",
      "r513",
      "r518",
      "r568",
      "r639",
      "r681"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets",
        "totalLabel": "Total assets",
        "verboseLabel": "Assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "ASSETS",
        "verboseLabel": "ASSETS"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsFairValueDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Assets, Fair Value Disclosure [Abstract]",
        "verboseLabel": "Financial Assets"
       }
      }
     },
     "localname": "AssetsFairValueDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssumedPremiumsEarned": {
     "auth_ref": [
      "r700",
      "r731",
      "r797",
      "r800"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of earned premiums assumed from other entities.",
        "label": "Assumed Premiums Earned",
        "verboseLabel": "Assumed from Other Companies"
       }
      }
     },
     "localname": "AssumedPremiumsEarned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": {
     "auth_ref": [
      "r214"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax",
        "terseLabel": "Unrealized Gains"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": {
     "auth_ref": [
      "r215"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax",
        "terseLabel": "Unrealized Losses"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": {
     "auth_ref": [
      "r211",
      "r248"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Amortized Cost",
        "totalLabel": "Amortized Cost",
        "verboseLabel": "Fixed maturities, available for sale, amortized cost"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities, Available-for-sale [Abstract]",
        "terseLabel": "Summary of fair value and gross unrealized losses of fixed maturity securities and equity securities in an unrealized loss position"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost",
        "verboseLabel": "Due in 1 year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value",
        "verboseLabel": "Due in 1 year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amortized cost of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost",
        "verboseLabel": "Due after 5 years through 10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value",
        "verboseLabel": "Due after 5 years through 10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost",
        "verboseLabel": "Due after 1 year through 5 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value",
        "verboseLabel": "Due after 1 year through 5 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasisRollingMaturityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost, Rolling Maturity [Abstract]",
        "terseLabel": "Amortized Cost"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasisRollingMaturityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateRollingMaturityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract]",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateRollingMaturityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecurities": {
     "auth_ref": [
      "r207",
      "r212",
      "r248",
      "r645"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale",
        "netLabel": "Fixed maturity securities, available for sale, at fair value (amortized cost 2020, $5,788,551; 2019, $5,456,980)",
        "terseLabel": "Fair Value",
        "totalLabel": "Total",
        "verboseLabel": "Fair value of issued securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsMaturitiesofFixedMaturitiesDetails",
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AwardTypeAxis": {
     "auth_ref": [
      "r418",
      "r447"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of award under share-based payment arrangement.",
        "label": "Award Type [Axis]",
        "terseLabel": "Award Type [Axis]"
       }
      }
     },
     "localname": "AwardTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by location on balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Axis]",
        "terseLabel": "Balance Sheet Location [Axis]"
       }
      }
     },
     "localname": "BalanceSheetLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationDomain": {
     "auth_ref": [
      "r526",
      "r531"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Location in the balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Domain]",
        "terseLabel": "Balance Sheet Location [Domain]"
       }
      }
     },
     "localname": "BalanceSheetLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BanksTrustAndInsuranceEquitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents investments by the reporting entity in equity securities issued by a bank, a trust or an insurance company.",
        "label": "Banks, Trust and Insurance, Equities [Member]",
        "terseLabel": "Banking &amp; finance and insurance companies"
       }
      }
     },
     "localname": "BanksTrustAndInsuranceEquitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).",
        "label": "Basis of Accounting, Policy [Policy Text Block]",
        "verboseLabel": "Basis of Presentation"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r127"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).  Accounting policies describe all significant accounting policies of the reporting entity.",
        "label": "Basis of Presentation and Significant Accounting Policies [Text Block]",
        "verboseLabel": "Basis of Presentation and Significant Accounting Policies"
       }
      }
     },
     "localname": "BasisOfPresentationAndSignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BenefitsLossesAndExpenses": {
     "auth_ref": [
      "r716"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.",
        "label": "Benefits, Losses and Expenses",
        "totalLabel": "Total benefits, losses and expenses"
       }
      }
     },
     "localname": "BenefitsLossesAndExpenses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BenefitsLossesAndExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Benefits, Losses and Expenses [Abstract]",
        "terseLabel": "Expenses",
        "verboseLabel": "Benefits, losses and expenses"
       }
      }
     },
     "localname": "BenefitsLossesAndExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionAcquireeDomain": {
     "auth_ref": [
      "r395",
      "r408"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.",
        "label": "Business Acquisition, Acquiree [Domain]",
        "terseLabel": "Business Acquisition, Acquiree [Domain]"
       }
      }
     },
     "localname": "BusinessAcquisitionAcquireeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAxis": {
     "auth_ref": [
      "r395",
      "r408",
      "r500",
      "r501"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by business combination or series of individually immaterial business combinations.",
        "label": "Business Acquisition [Axis]",
        "terseLabel": "Business Acquisition [Axis]"
       }
      }
     },
     "localname": "BusinessAcquisitionAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferred1": {
     "auth_ref": [
      "r506",
      "r507",
      "r508"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.",
        "label": "Business Combination, Consideration Transferred",
        "terseLabel": "Value of business acquired"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferred1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": {
     "auth_ref": [
      "r502",
      "r503"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of identifiable intangible assets recognized as of the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles",
        "terseLabel": "Acquired finite-lived intangible assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CallOptionMember": {
     "auth_ref": [
      "r831",
      "r832",
      "r833",
      "r834",
      "r835",
      "r836"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Financial contract between two parties, the buyer and the seller of the option, where the buyer has the right but not the obligation to buy an agreed quantity of a particular commodity or financial instrument (the underlying instrument) from the seller of the option for a certain price (the strike price). Seller is obligated to sell the asset to the buyer, if the buyer exercises the option.",
        "label": "Call Option [Member]",
        "terseLabel": "Call option"
       }
      }
     },
     "localname": "CallOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CarryingReportedAmountFairValueDisclosureMember": {
     "auth_ref": [
      "r563",
      "r564"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as reported on the statement of financial position (balance sheet).",
        "label": "Reported Value Measurement [Member]",
        "terseLabel": "Carrying Value"
       }
      }
     },
     "localname": "CarryingReportedAmountFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Cash": {
     "auth_ref": [
      "r22",
      "r818",
      "r819"
     ],
     "calculation": {
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash",
        "periodEndLabel": "Cash at end of period",
        "periodStartLabel": "Cash at beginning of period",
        "terseLabel": "Cash"
       }
      }
     },
     "localname": "Cash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsPolicyTextBlock": {
     "auth_ref": [
      "r4",
      "r110",
      "r117"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.",
        "label": "Cash and Cash Equivalents, Policy [Policy Text Block]",
        "verboseLabel": "Statements of Cash Flows"
       }
      }
     },
     "localname": "CashAndCashEquivalentsPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r99",
      "r108",
      "r115"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "periodEndLabel": "Cash at end of year",
        "periodStartLabel": "Cash at beginning of year",
        "terseLabel": "Cash",
        "totalLabel": "Total cash and restricted cash shown in the Consolidated Statements of Cash Flows"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r99",
      "r569"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect",
        "totalLabel": "Net (decrease) increase in cash"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries": {
     "auth_ref": [
      "r126"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element represents disclosure of the aggregate cash dividends paid to the entity by consolidated subsidiaries.",
        "label": "SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries",
        "verboseLabel": "Dividends received from subsidiaries"
       }
      }
     },
     "localname": "CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowSupplementalDisclosuresTextBlock": {
     "auth_ref": [
      "r116"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. \"Part noncash\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.",
        "label": "Cash Flow, Supplemental Disclosures [Text Block]",
        "verboseLabel": "Supplemental Consolidated Cash and Cash Flow Information"
       }
      }
     },
     "localname": "CashFlowSupplementalDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CashPeriodIncreaseDecrease": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash. Cash is the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Includes effect from exchange rate changes.",
        "label": "Cash, Period Increase (Decrease)",
        "totalLabel": "Net increase (decrease) in cash"
       }
      }
     },
     "localname": "CashPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CatastrophicEventDomain": {
     "auth_ref": [
      "r292",
      "r293"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Catastrophic event, for example, but not limited to, earthquake, windstorm, fire or explosion.",
        "label": "Catastrophic Event [Domain]",
        "terseLabel": "Catastrophic Event [Domain]"
       }
      }
     },
     "localname": "CatastrophicEventDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CededPremiumsEarned": {
     "auth_ref": [
      "r700",
      "r730",
      "r794",
      "r795",
      "r798",
      "r800"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of earned premiums ceded to other entities.",
        "label": "Ceded Premiums Earned",
        "verboseLabel": "Ceded to Other Companies"
       }
      }
     },
     "localname": "CededPremiumsEarned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1": {
     "auth_ref": [
      "r542"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 4.0,
       "parentTag": "us-gaap_RealizedInvestmentGainsLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.",
        "label": "Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments",
        "terseLabel": "Change in fair value and gains realized on settlements - derivatives"
       }
      }
     },
     "localname": "ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]",
        "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]"
       }
      }
     },
     "localname": "CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommercialMortgageBackedSecuritiesMember": {
     "auth_ref": [
      "r216",
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities collateralized by commercial real estate mortgage loans.",
        "label": "Commercial Mortgage Backed Securities [Member]",
        "terseLabel": "Commercial mortgage-backed securities"
       }
      }
     },
     "localname": "CommercialMortgageBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]",
        "terseLabel": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r289",
      "r290",
      "r291",
      "r294"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments and Contingencies Disclosure [Text Block]",
        "verboseLabel": "Contingencies and Commitments"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ContingenciesandCommitments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockDividendsPerShareCashPaid": {
     "auth_ref": [
      "r305"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate dividends paid during the period for each share of common stock outstanding.",
        "label": "Common Stock, Dividends, Per Share, Cash Paid",
        "verboseLabel": "Cash dividends (in usd per share)"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareCashPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r128",
      "r129"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "verboseLabel": "Common stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r16"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock, Par or Stated Value Per Share",
        "verboseLabel": "Common stock, par value (in usd per share)"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r16"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common Stock, Shares Authorized",
        "verboseLabel": "Common stock, shares authorized (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r16"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.",
        "label": "Common Stock, Shares, Issued",
        "verboseLabel": "Common stock, shares issued (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r16"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common Stock, Value, Issued",
        "terseLabel": "Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2020, 66,316,797; 2019, 66,088,808",
        "verboseLabel": "Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2020, 66,316,797; 2019, 66,088,808"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CompensationAndRetirementDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Retirement Benefits [Abstract]",
        "terseLabel": "Retirement Benefits [Abstract]"
       }
      }
     },
     "localname": "CompensationAndRetirementDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r66",
      "r68",
      "r69",
      "r77",
      "r656",
      "r704"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]",
        "verboseLabel": "Comprehensive income (loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNoteTextBlock": {
     "auth_ref": [
      "r76",
      "r84",
      "r655",
      "r702"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.",
        "label": "Comprehensive Income (Loss) Note [Text Block]",
        "terseLabel": "Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNoteTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLoss"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConcentrationRiskBenchmarkDomain": {
     "auth_ref": [
      "r163",
      "r164",
      "r203",
      "r565",
      "r566"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.",
        "label": "Concentration Risk Benchmark [Domain]",
        "terseLabel": "Concentration Risk Benchmark [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskBenchmarkDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConcentrationRiskByBenchmarkAxis": {
     "auth_ref": [
      "r163",
      "r164",
      "r203",
      "r565",
      "r566",
      "r816"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by benchmark of concentration risk.",
        "label": "Concentration Risk Benchmark [Axis]",
        "terseLabel": "Concentration Risk Benchmark [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByBenchmarkAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskByTypeAxis": {
     "auth_ref": [
      "r163",
      "r164",
      "r203",
      "r565",
      "r566",
      "r816"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of concentration risk, for example, but not limited to, asset, liability, net assets, geographic, customer, employees, supplier, lender.",
        "label": "Concentration Risk Type [Axis]",
        "terseLabel": "Concentration Risk Type [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure": {
     "auth_ref": [
      "r567"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.",
        "label": "Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure",
        "terseLabel": "Maximum exposure"
       }
      }
     },
     "localname": "ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r163",
      "r164",
      "r203",
      "r565",
      "r566"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"benchmark\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.",
        "label": "Concentration Risk, Percentage",
        "terseLabel": "Concentration risk, percent"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConcentrationRiskTypeDomain": {
     "auth_ref": [
      "r163",
      "r164",
      "r203",
      "r565",
      "r566"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration.",
        "label": "Concentration Risk Type [Domain]",
        "terseLabel": "Concentration Risk Type [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock": {
     "auth_ref": [
      "r0",
      "r125",
      "r510"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.",
        "label": "Condensed Financial Information of Parent Company Only Disclosure [Text Block]",
        "verboseLabel": "Schedule II Condensed Financial Information of Registrant"
       }
      }
     },
     "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrant"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConsolidationPolicyTextBlock": {
     "auth_ref": [
      "r117",
      "r515"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting.  The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.",
        "label": "Consolidation, Policy [Policy Text Block]",
        "terseLabel": "Consolidation"
       }
      }
     },
     "localname": "ConsolidationPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractHolderFundsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing contract holder funds.",
        "label": "Contract Holder Funds [Member]",
        "verboseLabel": "Closed-end fund"
       }
      }
     },
     "localname": "ContractHolderFundsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateAndOtherMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Component of an entity that provides financial and operational oversight and administrative support for other segments and other segments not separately reported due to size or nature of business activities. Excludes intersegment elimination and reconciling items.",
        "label": "Corporate and Other [Member]",
        "terseLabel": "Corporate and Other"
       }
      }
     },
     "localname": "CorporateAndOtherMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r339",
      "r388",
      "r809"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.",
        "label": "Corporate Debt Securities [Member]",
        "terseLabel": "Corporate bonds",
        "verboseLabel": "Corporate bonds"
       }
      }
     },
     "localname": "CorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateNonSegmentMember": {
     "auth_ref": [
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r197",
      "r199"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Corporate headquarters or functional department that may not earn revenues or may earn revenues that are only incidental to the activities of the entity and is not considered an operating segment.",
        "label": "Corporate, Non-Segment [Member]",
        "terseLabel": "Corporate and Other"
       }
      }
     },
     "localname": "CorporateNonSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CostOfGoodsAndServicesSoldAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cost of Goods and Services Sold [Abstract]",
        "verboseLabel": "Service cost:"
       }
      }
     },
     "localname": "CostOfGoodsAndServicesSoldAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Axis]",
        "terseLabel": "Credit Facility [Axis]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Domain]",
        "terseLabel": "Credit Facility [Domain]"
       }
      }
     },
     "localname": "CreditFacilityDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CurrentIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r119",
      "r484",
      "r492",
      "r494"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.",
        "label": "Current Income Tax Expense (Benefit)",
        "verboseLabel": "Current"
       }
      }
     },
     "localname": "CurrentIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CustomerConcentrationRiskMember": {
     "auth_ref": [
      "r162",
      "r203"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reflects the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.",
        "label": "Customer Concentration Risk [Member]",
        "terseLabel": "Third Party Reinsurer Risk"
       }
      }
     },
     "localname": "CustomerConcentrationRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CustomerRelationshipsMember": {
     "auth_ref": [
      "r505"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Customer relationship that exists between an entity and its customer, for example, but not limited to, tenant relationships.",
        "label": "Customer Relationships [Member]",
        "terseLabel": "Value of customer relationships"
       }
      }
     },
     "localname": "CustomerRelationshipsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtAndCapitalLeaseObligations": {
     "auth_ref": [
      "r647",
      "r698"
     ],
     "calculation": {
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of short-term and long-term debt and lease obligation.",
        "label": "Debt and Lease Obligation",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "DebtAndCapitalLeaseObligations",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtAndEquitySecuritiesGainLoss": {
     "auth_ref": [
      "r79",
      "r80"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrealized and realized gain (loss) on investment in debt and equity securities.",
        "label": "Debt and Equity Securities, Gain (Loss)",
        "terseLabel": "Sales and other, net"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Disclosure [Abstract]",
        "terseLabel": "Debt Disclosure [Abstract]"
       }
      }
     },
     "localname": "DebtDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtDisclosureTextBlock": {
     "auth_ref": [
      "r298"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.",
        "label": "Debt Disclosure [Text Block]",
        "verboseLabel": "Debt"
       }
      }
     },
     "localname": "DebtDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/Debt"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.",
        "label": "Debt Instrument, Basis Spread on Variable Rate",
        "terseLabel": "Basis spread on variable rate"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentFaceAmount": {
     "auth_ref": [
      "r579",
      "r581"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face (par) amount of debt instrument at time of issuance.",
        "label": "Debt Instrument, Face Amount",
        "terseLabel": "Principal amount"
       }
      }
     },
     "localname": "DebtInstrumentFaceAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentInterestRateEffectivePercentage": {
     "auth_ref": [
      "r31",
      "r297",
      "r579"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.",
        "label": "Debt Instrument, Interest Rate, Effective Percentage",
        "terseLabel": "Effective interest percentage"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateEffectivePercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentInterestRateStatedPercentage": {
     "auth_ref": [
      "r31"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.",
        "label": "Debt Instrument, Interest Rate, Stated Percentage",
        "terseLabel": "Stated rate",
        "verboseLabel": "Effective Interest Rates"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateStatedPercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Debt Instrument [Line Items]",
        "terseLabel": "Debt Instrument [Line Items]"
       }
      }
     },
     "localname": "DebtInstrumentLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentRedemptionPricePercentage": {
     "auth_ref": [
      "r666"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.",
        "label": "Debt Instrument, Redemption Price, Percentage",
        "terseLabel": "Debt redemption price, percentage"
       }
      }
     },
     "localname": "DebtInstrumentRedemptionPricePercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentTable": {
     "auth_ref": [
      "r32",
      "r122",
      "r301",
      "r302",
      "r303",
      "r304",
      "r578",
      "r579",
      "r581",
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.",
        "label": "Schedule of Long-term Debt Instruments [Table]",
        "terseLabel": "Schedule of Long-term Debt Instruments [Table]"
       }
      }
     },
     "localname": "DebtInstrumentTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentTerm": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Debt Instrument, Term",
        "terseLabel": "Debt term"
       }
      }
     },
     "localname": "DebtInstrumentTerm",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DebtInstrumentUnamortizedDiscount": {
     "auth_ref": [
      "r578",
      "r581"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of debt discount.",
        "label": "Debt Instrument, Unamortized Discount",
        "terseLabel": "Unamortized discount"
       }
      }
     },
     "localname": "DebtInstrumentUnamortizedDiscount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss": {
     "auth_ref": [
      "r213",
      "r248",
      "r255",
      "r256"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss",
        "terseLabel": "Available-for-sale securities, allowance for credit losses"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger": {
     "auth_ref": [
      "r223",
      "r253",
      "r258"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer",
        "terseLabel": "Fixed maturity securities, Fair Value, More than 12 Months"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss": {
     "auth_ref": [
      "r223",
      "r253"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss",
        "terseLabel": "Fixed maturity securities, Gross Unrealized Losses, More than 12 Months"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions": {
     "auth_ref": [
      "r251"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions",
        "terseLabel": "Number of position with a gross unrealized loss, more than 12 months"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months": {
     "auth_ref": [
      "r223",
      "r253",
      "r258"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months",
        "terseLabel": "Fixed maturity securities, Fair Value, 12 Months or Less"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss": {
     "auth_ref": [
      "r223",
      "r253"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss",
        "terseLabel": "Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions": {
     "auth_ref": [
      "r251"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions",
        "terseLabel": "Number of positions with a gross unrealized loss, 12 Months or Less"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput": {
     "auth_ref": [
      "r550"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Measurement Input",
        "terseLabel": "Debt securities, measurement input"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleRealizedGain": {
     "auth_ref": [
      "r230"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Realized Gain",
        "terseLabel": "Gross gains realized"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleRealizedGain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss": {
     "auth_ref": [
      "r230"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Realized Loss",
        "negatedLabel": "Gross losses realized"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleRealizedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleTable": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale [Table]",
        "terseLabel": "Debt Securities, Available-for-sale [Table]"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition": {
     "auth_ref": [
      "r220",
      "r249",
      "r258"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position",
        "totalLabel": "Fixed maturity securities, Fair Value, Total"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss": {
     "auth_ref": [
      "r221",
      "r250"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss",
        "totalLabel": "Fixed maturity securities, Gross Unrealized Losses, Total"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock": {
     "auth_ref": [
      "r219",
      "r252",
      "r258"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]",
        "verboseLabel": "Summary of fair value and gross unrealized losses of fixed maturity securities and equity securities in an unrealized loss position"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions": {
     "auth_ref": [
      "r222",
      "r251"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions",
        "totalLabel": "Number of position with a gross unrealized loss, Total"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_DebtSecuritiesGainLossExcludingOtti": {
     "auth_ref": [
      "r79",
      "r80",
      "r652",
      "r707"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_RealizedInvestmentGainsLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrealized and realized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity), investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). Excludes other-than-temporary impairment (OTTI).",
        "label": "Debt Securities, Gain (Loss), Excluding OTTI",
        "verboseLabel": "Sales and other, net"
       }
      }
     },
     "localname": "DebtSecuritiesGainLossExcludingOtti",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesMember": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.",
        "label": "Debt Securities [Member]",
        "terseLabel": "Fixed maturity securities",
        "verboseLabel": "Total"
       }
      }
     },
     "localname": "DebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredChargesPolicyTextBlock": {
     "auth_ref": [
      "r27",
      "r117"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for deferral and amortization of significant deferred charges.",
        "label": "Deferred Charges, Policy [Policy Text Block]",
        "verboseLabel": "Deferred Policy Acquisition Costs"
       }
      }
     },
     "localname": "DeferredChargesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DeferredIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r106",
      "r119",
      "r485",
      "r492",
      "r493",
      "r494"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred Income Tax Expense (Benefit)",
        "verboseLabel": "Deferred"
       }
      }
     },
     "localname": "DeferredIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilities": {
     "auth_ref": [
      "r13",
      "r14",
      "r477",
      "r641",
      "r676"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.",
        "label": "Deferred Tax Liabilities, Gross",
        "totalLabel": "Total gross deferred tax liabilities"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense": {
     "auth_ref": [
      "r106",
      "r669",
      "r709",
      "r739",
      "r740",
      "r742",
      "r778"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 4.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.",
        "label": "Deferred Policy Acquisition Costs, Amortization Expense",
        "verboseLabel": "DAC unlocking and amortization expense"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostAmortizationExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin": {
     "auth_ref": [
      "r738",
      "r739"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization expense (reversal of amortization expense) of deferred policy acquisition costs from a revision in estimated gross profit or estimated gross margin.",
        "label": "Deferred Policy Acquisition Cost, Amortization Expense, Effect of Adjustments to Estimated Gross Profit or Estimated Gross Margin",
        "verboseLabel": "Total"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostAmortizationExpenseEffectOfAdjustmentsToEstimatedGrossProfitOrEstimatedGrossMargin",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCosts": {
     "auth_ref": [
      "r692",
      "r740",
      "r741",
      "r742",
      "r778",
      "r815"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred policy acquisition cost capitalized on contract remaining in force.",
        "label": "Deferred Policy Acquisition Cost",
        "verboseLabel": "Deferred policy acquisition costs"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsGross": {
     "auth_ref": [
      "r478"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredTaxLiabilities",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "Deferred Tax Assets, Gross",
        "totalLabel": "Total gross deferred tax assets"
       }
      }
     },
     "localname": "DeferredTaxAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Deferred Tax Assets, Net [Abstract]",
        "verboseLabel": "Deferred tax assets"
       }
      }
     },
     "localname": "DeferredTaxAssetsNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredTaxAssetsOperatingLossCarryforwards": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.",
        "label": "Deferred Tax Assets, Operating Loss Carryforwards",
        "terseLabel": "Net operating loss carryforwards"
       }
      }
     },
     "localname": "DeferredTaxAssetsOperatingLossCarryforwards",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation",
        "verboseLabel": "Compensation accruals"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits": {
     "auth_ref": [
      "r482"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits",
        "verboseLabel": "Postretirement benefits other than pensions"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated impairment losses.",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses",
        "verboseLabel": "Impaired securities"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from loss reserves other than estimated credit losses.",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves",
        "verboseLabel": "Discounting of unpaid claims and claim expense tax reserves"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DeferredTaxAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the unearned premiums reserve.",
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Reserve",
        "verboseLabel": "Unearned premium reserve reduction"
       }
      }
     },
     "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilities": {
     "auth_ref": [
      "r465",
      "r479"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.",
        "label": "Deferred Tax Liabilities, Net",
        "totalLabel": "Net deferred tax liability"
       }
      }
     },
     "localname": "DeferredTaxLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesDeferredExpense": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs.",
        "label": "Deferred Tax Liabilities, Deferred Expense",
        "verboseLabel": "Deferred policy acquisition costs"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesDeferredExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.",
        "label": "Deferred Tax Liabilities, Intangible Assets",
        "verboseLabel": "Intangibles"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesInvestments": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).",
        "label": "Deferred Tax Liabilities, Investments",
        "verboseLabel": "Investment related adjustments"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Deferred Tax Liabilities, Net [Abstract]",
        "verboseLabel": "Deferred tax liabilities"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredTaxLiabilitiesOther": {
     "auth_ref": [
      "r482",
      "r483"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_DeferredIncomeTaxLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.",
        "label": "Deferred Tax Liabilities, Other",
        "verboseLabel": "Other, net"
       }
      }
     },
     "localname": "DeferredTaxLiabilitiesOther",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax": {
     "auth_ref": [
      "r54",
      "r60",
      "r359"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax",
        "totalLabel": "Total amount recognized in AOCI"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]",
        "terseLabel": "Changes in plan assets and benefit obligations included in other comprehensive income (loss):"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract]",
        "verboseLabel": "Amortization of:"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax": {
     "auth_ref": [
      "r60",
      "r359"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.",
        "label": "Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax",
        "negatedLabel": "Net actuarial loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax": {
     "auth_ref": [
      "r60",
      "r359"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax",
        "verboseLabel": "Prior service cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets": {
     "auth_ref": [
      "r328",
      "r388"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.",
        "label": "Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)",
        "verboseLabel": "Actual return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanActualReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanActuarialGainLoss": {
     "auth_ref": [
      "r321"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.",
        "label": "Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)",
        "negatedLabel": "Actuarial loss (gain)"
       }
      }
     },
     "localname": "DefinedBenefitPlanActuarialGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": {
     "auth_ref": [
      "r314",
      "r354",
      "r382",
      "r388",
      "r389"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 7.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.",
        "label": "Defined Benefit Plan, Amortization of Gain (Loss)",
        "negatedLabel": "Actuarial loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": {
     "auth_ref": [
      "r314",
      "r355",
      "r383",
      "r388",
      "r389"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.",
        "label": "Defined Benefit Plan, Amortization of Prior Service Cost (Credit)",
        "verboseLabel": "Prior service cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet": {
     "auth_ref": [
      "r313",
      "r336"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.",
        "label": "Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position",
        "terseLabel": "Total amount recognized in Consolidated Balance Sheets, all in Other liabilities"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmountsRecognizedInBalanceSheet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]",
        "terseLabel": "Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate": {
     "auth_ref": [
      "r360"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.",
        "label": "Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate",
        "terseLabel": "Discount rate"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate": {
     "auth_ref": [
      "r360"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.",
        "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate",
        "verboseLabel": "Discount rate"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets": {
     "auth_ref": [
      "r362",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.",
        "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets",
        "verboseLabel": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanBenefitObligation": {
     "auth_ref": [
      "r316"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DefinedBenefitPlanFundedStatusOfPlan",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "Defined Benefit Plan, Benefit Obligation",
        "periodEndLabel": "Projected benefit obligation at end of year",
        "periodStartLabel": "Projected benefit obligation at beginning of year"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid": {
     "auth_ref": [
      "r323",
      "r392"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.",
        "label": "Defined Benefit Plan, Benefit Obligation, Benefits Paid",
        "negatedLabel": "Benefits paid"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitObligationBenefitsPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis": {
     "auth_ref": [
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r365",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by defined benefit plan asset investment.",
        "label": "Defined Benefit Plan, Plan Assets, Category [Axis]",
        "terseLabel": "Defined Benefit Plan, Plan Assets, Category [Axis]"
       }
      }
     },
     "localname": "DefinedBenefitPlanByPlanAssetCategoriesAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]",
        "verboseLabel": "Change in benefit obligation:"
       }
      }
     },
     "localname": "DefinedBenefitPlanChangeInBenefitObligationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]",
        "verboseLabel": "Change in plan assets:"
       }
      }
     },
     "localname": "DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanContributionsByEmployer": {
     "auth_ref": [
      "r330",
      "r339",
      "r341",
      "r386",
      "r388",
      "r389"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of contribution received by defined benefit plan from employer which increases plan assets.",
        "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer",
        "terseLabel": "Employer contributions",
        "verboseLabel": "Contributions to employees' accounts"
       }
      }
     },
     "localname": "DefinedBenefitPlanContributionsByEmployer",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanDisclosureLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Defined Benefit Plan Disclosure [Line Items]",
        "terseLabel": "Defined Benefit Plan Disclosure [Line Items]"
       }
      }
     },
     "localname": "DefinedBenefitPlanDisclosureLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember": {
     "auth_ref": [
      "r339",
      "r341",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, not domiciled in United States of America (US), for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, Non-US [Member]",
        "terseLabel": "Equity security funds, International"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesNonUsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember": {
     "auth_ref": [
      "r339",
      "r341",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Security representing ownership in corporation or other legal entity, domiciled in United States of America (US), for which ownership is represented by share of stock; in which defined benefit plan asset is invested. Includes, but is not limited to, common stock, preferred stock, convertible security, stock right and stock warrant.",
        "label": "Defined Benefit Plan, Equity Securities, US [Member]",
        "terseLabel": "Equity security funds, United States"
       }
      }
     },
     "localname": "DefinedBenefitPlanEquitySecuritiesUsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear": {
     "auth_ref": [
      "r371"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.",
        "label": "Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year",
        "terseLabel": "Expected amortization of gain (loss) next year"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years",
        "verboseLabel": "2026-2030"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year One",
        "verboseLabel": "2021"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Five",
        "verboseLabel": "2025"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Four",
        "verboseLabel": "2024"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Three",
        "verboseLabel": "2023"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.",
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Two",
        "verboseLabel": "2022"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": {
     "auth_ref": [
      "r314",
      "r353",
      "r381",
      "r388",
      "r389"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.",
        "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets",
        "negatedLabel": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanFairValueOfPlanAssets": {
     "auth_ref": [
      "r327",
      "r339",
      "r341",
      "r342",
      "r388"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DefinedBenefitPlanFundedStatusOfPlan",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
        "label": "Defined Benefit Plan, Plan Assets, Amount",
        "periodEndLabel": "Fair value of plan assets at end of year",
        "periodStartLabel": "Fair value of plan assets at beginning of year",
        "terseLabel": "Total assets at the end of the year",
        "verboseLabel": "Plan assets amount"
       }
      }
     },
     "localname": "DefinedBenefitPlanFairValueOfPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanFundedStatusOfPlan": {
     "auth_ref": [
      "r313",
      "r336",
      "r388"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.",
        "label": "Defined Benefit Plan, Funded (Unfunded) Status of Plan",
        "totalLabel": "Funded status"
       }
      }
     },
     "localname": "DefinedBenefitPlanFundedStatusOfPlan",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanInterestCost": {
     "auth_ref": [
      "r314",
      "r319",
      "r352",
      "r380",
      "r388",
      "r389"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.",
        "label": "Defined Benefit Plan, Interest Cost",
        "verboseLabel": "Interest cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanInterestCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": {
     "auth_ref": [
      "r350",
      "r378",
      "r388",
      "r389"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.",
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)",
        "totalLabel": "Net periodic pension expense"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]",
        "verboseLabel": "Information for pension plans with an accumulated benefit obligation greater than plan assets:"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation": {
     "auth_ref": [
      "r374",
      "r375",
      "r388"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation",
        "verboseLabel": "Accumulated benefit obligation"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets": {
     "auth_ref": [
      "r374",
      "r375",
      "r388"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets",
        "terseLabel": "Fair value of plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation": {
     "auth_ref": [
      "r374"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.",
        "label": "Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation",
        "verboseLabel": "Projected benefit obligation"
       }
      }
     },
     "localname": "DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAmendments": {
     "auth_ref": [
      "r324"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.",
        "label": "Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment",
        "verboseLabel": "Plan amendments"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAmendments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid": {
     "auth_ref": [
      "r332",
      "r392"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.",
        "label": "Defined Benefit Plan, Plan Assets, Benefits Paid",
        "negatedLabel": "Benefits paid"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsBenefitsPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage": {
     "auth_ref": [
      "r338",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.",
        "label": "Defined Benefit Plan, Plan Assets, Target Allocation, Percentage",
        "terseLabel": "Defined benefit pension plan to approximate allocation"
       }
      }
     },
     "localname": "DefinedBenefitPlanPlanAssetsTargetAllocationPercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1": {
     "auth_ref": [
      "r315",
      "r357",
      "r385"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.",
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement",
        "negatedLabel": "Settlement loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanServiceCost": {
     "auth_ref": [
      "r317",
      "r351",
      "r379",
      "r388",
      "r389"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "Defined Benefit Plan, Service Cost",
        "verboseLabel": "Service cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanServiceCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanSettlementsBenefitObligation": {
     "auth_ref": [
      "r318"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.",
        "label": "Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "DefinedBenefitPlanSettlementsBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanSettlementsPlanAssets": {
     "auth_ref": [
      "r335"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.",
        "label": "Defined Benefit Plan, Plan Assets, Payment for Settlement",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "DefinedBenefitPlanSettlementsPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]",
        "verboseLabel": "Weighted average assumptions used to determine benefit obligations as of December 31:"
       }
      }
     },
     "localname": "DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]",
        "verboseLabel": "Weighted average assumptions used to determine expense:"
       }
      }
     },
     "localname": "DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable": {
     "auth_ref": [
      "r372",
      "r373",
      "r376",
      "r377",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosures and provisions pertaining to defined benefit pension plans or other postretirement defined benefit plans. The arrangements are generally based on terms and conditions stipulated by the entity, and which contain a promise by the employer to pay certain amounts or awards at designated future dates, including a period after retirement, upon compliance with stipulated requirements. Excludes disclosures pertaining to defined contribution plans.",
        "label": "Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]",
        "terseLabel": "Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]"
       }
      }
     },
     "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]",
        "terseLabel": "Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]"
       }
      }
     },
     "localname": "DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of discretionary contributions made by an employer to a defined contribution plan.",
        "label": "Defined Contribution Plan, Employer Discretionary Contribution Amount",
        "terseLabel": "Contributions to employees' accounts"
       }
      }
     },
     "localname": "DefinedContributionPlanEmployerDiscretionaryContributionAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.",
        "label": "Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay",
        "terseLabel": "Employer matching contribution as percent of employees' gross pay"
       }
      }
     },
     "localname": "DefinedContributionPlanEmployerMatchingContributionPercent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage employer matches of the employee's percentage contribution matched.",
        "label": "Defined Contribution Plan, Employer Matching Contribution, Percent of Match",
        "terseLabel": "Percentage of employer match"
       }
      }
     },
     "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatch",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r106",
      "r176"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.",
        "label": "Depreciation, Depletion and Amortization",
        "terseLabel": "Depreciation and intangible asset amortization"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetFairValueGrossLiability": {
     "auth_ref": [
      "r36",
      "r46",
      "r529"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DerivativeAssets",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Asset, Fair Value, Gross Liability",
        "terseLabel": "Gross Amounts Offset in the Consolidated Balance Sheets"
       }
      }
     },
     "localname": "DerivativeAssetFairValueGrossLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetFairValueOfCollateral": {
     "auth_ref": [
      "r42"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of securities received as collateral against derivative assets.",
        "label": "Derivative Asset, Fair Value of Collateral",
        "terseLabel": "Fair value of collateral"
       }
      }
     },
     "localname": "DerivativeAssetFairValueOfCollateral",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection": {
     "auth_ref": [
      "r40",
      "r43"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value, after effects of master netting arrangements, deduction of assets not subject to a master netting arrangement and elected not to be offset, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, offset against an obligation to return collateral.",
        "label": "Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election",
        "totalLabel": "Net Amount"
       }
      }
     },
     "localname": "DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction": {
     "auth_ref": [
      "r38",
      "r43"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset, deducted from derivative assets.",
        "label": "Derivative Asset, Not Offset, Policy Election Deduction",
        "terseLabel": "Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments"
       }
      }
     },
     "localname": "DerivativeAssetNotOffsetPolicyElectionDeduction",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssets": {
     "auth_ref": [
      "r37",
      "r41",
      "r562"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Asset",
        "terseLabel": "Fair value",
        "totalLabel": "Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheets",
        "verboseLabel": "Derivatives, reported in Short-term and other investments"
       }
      }
     },
     "localname": "DerivativeAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails",
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Derivative Asset [Abstract]",
        "verboseLabel": "Assets"
       }
      }
     },
     "localname": "DerivativeAssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeCollateralObligationToReturnCash": {
     "auth_ref": [
      "r39",
      "r43",
      "r538"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.",
        "label": "Derivative, Collateral, Obligation to Return Cash",
        "terseLabel": "Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received"
       }
      }
     },
     "localname": "DerivativeCollateralObligationToReturnCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeContractTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Contract [Domain]",
        "terseLabel": "Derivative Contract [Domain]"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails",
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeFairValueOfDerivativeAsset": {
     "auth_ref": [
      "r35",
      "r45",
      "r529",
      "r612"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DerivativeAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.",
        "label": "Derivative Asset, Fair Value, Gross Asset",
        "verboseLabel": "Gross Amounts"
       }
      }
     },
     "localname": "DerivativeFairValueOfDerivativeAsset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeGainLossOnDerivativeNet": {
     "auth_ref": [
      "r528"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.",
        "label": "Derivative, Gain (Loss) on Derivative, Net",
        "verboseLabel": "Net investment gains (losses)"
       }
      }
     },
     "localname": "DerivativeGainLossOnDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeGainLossOnDerivativeNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Derivative, Gain (Loss) on Derivative, Net [Abstract]",
        "verboseLabel": "Change in fair value of derivatives:"
       }
      }
     },
     "localname": "DerivativeGainLossOnDerivativeNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r527",
      "r530",
      "r533",
      "r535"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument [Axis]",
        "terseLabel": "Derivative Instrument [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails",
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Derivative Instruments and Hedging Activities Disclosure [Abstract]",
        "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r544"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.",
        "label": "Derivative Instruments and Hedging Activities Disclosure [Text Block]",
        "verboseLabel": "Derivatives"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/Derivatives"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DerivativeLiabilities": {
     "auth_ref": [
      "r37",
      "r41",
      "r562"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Liability",
        "terseLabel": "Derivatives embedded in fixed indexed annuity products"
       }
      }
     },
     "localname": "DerivativeLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Derivative Liability [Abstract]",
        "verboseLabel": "Liabilities"
       }
      }
     },
     "localname": "DerivativeLiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeLiabilityMeasurementInput": {
     "auth_ref": [
      "r550"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of input used to measure derivative liability.",
        "label": "Derivative Liability, Measurement Input",
        "terseLabel": "Derivatives embedded in fixed indexed annuity products, measurement input"
       }
      }
     },
     "localname": "DerivativeLiabilityMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_DerivativeLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Derivative [Line Items]",
        "terseLabel": "Derivative [Line Items]"
       }
      }
     },
     "localname": "DerivativeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r521",
      "r523"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "Derivative, Notional Amount",
        "verboseLabel": "Notional amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeTable": {
     "auth_ref": [
      "r520",
      "r522",
      "r523",
      "r524",
      "r525",
      "r532",
      "r533",
      "r537",
      "r539",
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule that describes and identifies a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.",
        "label": "Derivative [Table]",
        "terseLabel": "Derivative [Table]"
       }
      }
     },
     "localname": "DerivativeTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/DerivativesNotionalandFairValueAmountsofDerivativeInstrumentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeTermOfContract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Derivative, Term of Contract",
        "terseLabel": "Derivative term of contract"
       }
      }
     },
     "localname": "DerivativeTermOfContract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DerivativesFairValueLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Derivatives, Fair Value [Line Items]",
        "terseLabel": "Derivatives, Fair Value [Line Items]"
       }
      }
     },
     "localname": "DerivativesFairValueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DirectPremiumsEarned": {
     "auth_ref": [
      "r700",
      "r729",
      "r796",
      "r799"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums earned.",
        "label": "Direct Premiums Earned",
        "verboseLabel": "Gross Amount"
       }
      }
     },
     "localname": "DirectPremiumsEarned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendsCommonStockCash": {
     "auth_ref": [
      "r305"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.",
        "label": "Dividends, Common Stock, Cash",
        "negatedLabel": "Dividends, 2020, $1.20 per share; 2019, $1.15 per share; 2018, $1.14 per share"
       }
      }
     },
     "localname": "DividendsCommonStockCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share [Abstract]",
        "verboseLabel": "Net income per share"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r78",
      "r136",
      "r137",
      "r138",
      "r139",
      "r140",
      "r144",
      "r146",
      "r148",
      "r149",
      "r150",
      "r153",
      "r154",
      "r657",
      "r705"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Earnings Per Share, Basic",
        "netLabel": "Net income - basic (in usd per share)",
        "terseLabel": "Basic (in usd per share)",
        "verboseLabel": "Net income per share - basic (in usd per share)"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareBasicAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share, Basic [Abstract]",
        "terseLabel": "Basic",
        "verboseLabel": "Basic:"
       }
      }
     },
     "localname": "EarningsPerShareBasicAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]",
        "terseLabel": "Weighted average number of shares and equivalent shares"
       }
      }
     },
     "localname": "EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r78",
      "r136",
      "r137",
      "r138",
      "r139",
      "r140",
      "r146",
      "r148",
      "r149",
      "r150",
      "r153",
      "r154",
      "r657",
      "r705"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Earnings Per Share, Diluted",
        "netLabel": "Net income per share - diluted (in usd per share)",
        "terseLabel": "Net income - diluted (in usd per share)",
        "verboseLabel": "Diluted (in usd per share)"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDilutedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Earnings Per Share, Diluted [Abstract]",
        "terseLabel": "Diluted",
        "verboseLabel": "Diluted:"
       }
      }
     },
     "localname": "EarningsPerShareDilutedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerSharePolicyTextBlock": {
     "auth_ref": [
      "r117",
      "r151",
      "r152"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.",
        "label": "Earnings Per Share, Policy [Policy Text Block]",
        "verboseLabel": "Earnings Per Share"
       }
      }
     },
     "localname": "EarningsPerSharePolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectsOfReinsuranceLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Effects of Reinsurance [Line Items]",
        "terseLabel": "Effects of Reinsurance [Line Items]"
       }
      }
     },
     "localname": "EffectsOfReinsuranceLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectsOfReinsuranceTable": {
     "auth_ref": [
      "r802"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about the effects of reinsurance, including, but not limited to, disclosure of direct, assumed, and ceded insurance.",
        "label": "Effects of Reinsurance [Table]",
        "terseLabel": "Effects of Reinsurance [Table]"
       }
      }
     },
     "localname": "EffectsOfReinsuranceTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectsOfReinsuranceTableTextBlock": {
     "auth_ref": [
      "r802"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance.",
        "label": "Effects of Reinsurance [Table Text Block]",
        "verboseLabel": "Effects of reinsurance on premiums and benefits"
       }
      }
     },
     "localname": "EffectsOfReinsuranceTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet": {
     "auth_ref": [
      "r541"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.",
        "label": "Embedded Derivative, Gain (Loss) on Embedded Derivative, Net",
        "terseLabel": "Net investment gains (losses)",
        "verboseLabel": "Net investment gain (loss)"
       }
      }
     },
     "localname": "EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Embedded Derivative, Gain (Loss) on Embedded Derivative, Net [Abstract]",
        "verboseLabel": "Change in fair value of embedded derivatives:"
       }
      }
     },
     "localname": "EmbeddedDerivativeGainLossOnEmbeddedDerivativeNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions": {
     "auth_ref": [
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.",
        "label": "Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount",
        "terseLabel": "Unrecognized share-based compensation expense, equity instruments other than options"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions": {
     "auth_ref": [
      "r446"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost to be recognized for option under share-based payment arrangement.",
        "label": "Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount",
        "terseLabel": "Unrecognized share-based compensation expense, nonvested options"
       }
      }
     },
     "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeStockOptionMember": {
     "auth_ref": [
      "r444"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.",
        "label": "Share-based Payment Arrangement, Option [Member]",
        "terseLabel": "Employee stock option"
       }
      }
     },
     "localname": "EmployeeStockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Equity [Abstract]",
        "terseLabel": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r133",
      "r141",
      "r143",
      "r157",
      "r240",
      "r300",
      "r305",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489",
      "r570",
      "r571",
      "r572",
      "r573",
      "r574",
      "r576",
      "r775",
      "r776",
      "r777"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]",
        "terseLabel": "Equity Component [Domain]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentsMember": {
     "auth_ref": [
      "r234"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment in the stock of an investee which is adjusted for the investor's share of the earnings or losses of the investee after the date of acquisition.",
        "label": "Equity Method Investments [Member]",
        "terseLabel": "Limited partnership interests"
       }
      }
     },
     "localname": "EquityMethodInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesFvNi": {
     "auth_ref": [
      "r560"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities, FV-NI",
        "terseLabel": "Equity securities at fair value"
       }
      }
     },
     "localname": "EquitySecuritiesFvNi",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquitySecuritiesFvNiGainLoss": {
     "auth_ref": [
      "r233"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "us-gaap_RealizedInvestmentGainsLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities, FV-NI, Gain (Loss)",
        "terseLabel": "Change in fair value - equity securities"
       }
      }
     },
     "localname": "EquitySecuritiesFvNiGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquitySecuritiesFvNiMeasurementInput": {
     "auth_ref": [
      "r550"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of input used to measure investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities, FV-NI, Measurement Input",
        "terseLabel": "Equity securities, measurement input"
       }
      }
     },
     "localname": "EquitySecuritiesFvNiMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_EquitySecuritiesFvNiRealizedGain": {
     "auth_ref": [
      "r233"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities, FV-NI, Realized Gain",
        "terseLabel": "Gross gains realized"
       }
      }
     },
     "localname": "EquitySecuritiesFvNiRealizedGain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquitySecuritiesFvNiRealizedLoss": {
     "auth_ref": [
      "r233"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities, FV-NI, Realized Loss",
        "negatedLabel": "Gross losses realized"
       }
      }
     },
     "localname": "EquitySecuritiesFvNiRealizedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquitySecuritiesInvestmentSummaryMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element provides types of investments that may be contained within the equity securities category. Examples of items within this category may include common stocks and nonredeemable preferred stocks which may, at a minimum, be further categorized by investments in companies within the following industries: (1) public utilities; (2) banks, trust and insurance companies; (3) industrial, miscellaneous and all other.",
        "label": "Equity Securities, Investment Summary [Member]",
        "verboseLabel": "Equity securities"
       }
      }
     },
     "localname": "EquitySecuritiesInvestmentSummaryMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesMember": {
     "auth_ref": [
      "r5",
      "r10",
      "r232",
      "r678",
      "r842",
      "r843",
      "r844"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.",
        "label": "Equity Securities [Member]",
        "terseLabel": "Equity securities"
       }
      }
     },
     "localname": "EquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EstimateOfFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r562"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as an estimate of fair value.",
        "label": "Estimate of Fair Value Measurement [Member]",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "EstimateOfFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]",
        "verboseLabel": "Summary of Company's fair value hierarchy measured at recurring basis"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r545",
      "r546",
      "r547",
      "r557"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value, Recurring and Nonrecurring [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]",
        "terseLabel": "Fair value measurement inputs and valuation techniques"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]",
        "verboseLabel": "Table for reconciliations for all Level 3 assets measured at fair value on a recurring basis"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": {
     "auth_ref": [
      "r551",
      "r557"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]",
        "verboseLabel": "Table for reconciliations for all Level 3 assets measured at fair value on a recurring basis"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r388",
      "r546",
      "r602",
      "r603",
      "r604"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]",
        "terseLabel": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementBasisAxis": {
     "auth_ref": [
      "r545",
      "r558"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by measurement basis.",
        "label": "Measurement Basis [Axis]",
        "terseLabel": "Measurement Basis [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementBasisAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r545",
      "r546",
      "r549",
      "r550",
      "r559"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Measurement Frequency [Axis]",
        "terseLabel": "Measurement Frequency [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosureItemAmountsDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.",
        "label": "Fair Value Measurement [Domain]",
        "terseLabel": "Fair Value Measurement [Domain]"
       }
      }
     },
     "localname": "FairValueDisclosureItemAmountsDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]",
        "terseLabel": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r556"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.",
        "label": "Fair Value Disclosures [Text Block]",
        "verboseLabel": "Fair Value of Financial Instruments"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstruments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r339",
      "r341",
      "r346",
      "r388",
      "r546",
      "r602"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value, Inputs, Level 1 [Member]",
        "verboseLabel": "Level 1"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r339",
      "r341",
      "r346",
      "r388",
      "r546",
      "r603"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value, Inputs, Level 2 [Member]",
        "verboseLabel": "Level 2"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r388",
      "r546",
      "r604"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Inputs, Level 3 [Member]",
        "terseLabel": "Fair Value, Inputs, Level 3",
        "verboseLabel": "Level 3"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement frequency.",
        "label": "Measurement Frequency [Domain]",
        "terseLabel": "Measurement Frequency [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3": {
     "auth_ref": [
      "r555"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3",
        "terseLabel": "Transfers into Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3": {
     "auth_ref": [
      "r555"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3",
        "negatedTerseLabel": "Transfers out of Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1": {
     "auth_ref": [
      "r552"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings",
        "negatedTerseLabel": "Net investment losses included in net income related to financial assets",
        "terseLabel": "Net investment gains (losses) included in net income related to financial assets"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss": {
     "auth_ref": [
      "r553"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)",
        "verboseLabel": "Net unrealized investment gains (losses) included in OCI"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances",
        "verboseLabel": "Issuances"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases",
        "verboseLabel": "Purchases"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales",
        "negatedLabel": "Sales"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3": {
     "auth_ref": [
      "r555"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3",
        "verboseLabel": "Transfers into Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3": {
     "auth_ref": [
      "r555"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3",
        "negatedLabel": "Transfers out of Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": {
     "auth_ref": [
      "r551"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings": {
     "auth_ref": [
      "r552"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings",
        "negatedTerseLabel": "Net investment (gains) losses included in net income related to financial liabilities"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome": {
     "auth_ref": [
      "r553"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)",
        "negatedTerseLabel": "Net unrealized investment gains (losses) included in OCI"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances",
        "terseLabel": "Issuances"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases",
        "terseLabel": "Purchases"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of sales of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales",
        "negatedTerseLabel": "Sales"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements",
        "negatedTerseLabel": "Settlements"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue": {
     "auth_ref": [
      "r551"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r388",
      "r602",
      "r603",
      "r604"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Hierarchy and NAV [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r556",
      "r559"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Frequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, frequently measured at fair value.",
        "label": "Fair Value, Recurring [Member]",
        "verboseLabel": "Recurring"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable": {
     "auth_ref": [
      "r526",
      "r532",
      "r540"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule that discloses the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.",
        "label": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]",
        "terseLabel": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]"
       }
      }
     },
     "localname": "FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesinConsolidatedBalanceSheetsDetails",
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch": {
     "auth_ref": [
      "r663"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of advances from the Federal Home Loan Bank (FHLB).",
        "label": "Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances",
        "terseLabel": "FHLB advances"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate": {
     "auth_ref": [
      "r663",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.",
        "label": "Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate",
        "terseLabel": "FHLB interest rate"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_FederalHomeLoanBankAdvancesInterestRate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate of advances made and reported by Federal Home Loan Bank (FHLBank).",
        "label": "Federal Home Loan Bank, Advances, Interest Rate",
        "terseLabel": "FHLB advances interest rate"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_FederalHomeLoanBankAdvancesLongTerm": {
     "auth_ref": [
      "r649",
      "r663",
      "r664"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.",
        "label": "Long-term Federal Home Loan Bank Advances",
        "terseLabel": "FHLB advances"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesLongTerm",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FederalHomeLoanBankAdvancesMember": {
     "auth_ref": [
      "r646"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Borrowings from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and also in times of liquidity shortages. The member institution executes a promissory note, which is generally collateralized by government securities to the Federal Reserve or loans.",
        "label": "Federal Home Loan Bank Advances [Member]",
        "terseLabel": "Federal Home Loan Bank borrowing"
       }
      }
     },
     "localname": "FederalHomeLoanBankAdvancesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember": {
     "auth_ref": [
      "r647"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments in debentures, bonds and other debt securities issued by the Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac).",
        "label": "Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]",
        "terseLabel": "FHLMC"
       }
      }
     },
     "localname": "FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember": {
     "auth_ref": [
      "r647"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments in debentures, bonds and other debt securities issued by the Federal National Mortgage Association (FNMA or Fannie Mae).",
        "label": "Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]",
        "terseLabel": "FNMA"
       }
      }
     },
     "localname": "FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [
      "r217",
      "r218",
      "r243",
      "r244",
      "r245",
      "r246",
      "r247",
      "r252",
      "r254",
      "r257",
      "r258",
      "r599",
      "r600",
      "r601",
      "r602",
      "r603",
      "r604",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r611",
      "r613",
      "r614",
      "r615",
      "r616",
      "r617",
      "r618",
      "r619",
      "r620",
      "r621",
      "r622",
      "r623",
      "r624",
      "r625",
      "r626",
      "r627",
      "r628",
      "r629"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of financial instrument.",
        "label": "Financial Instrument [Axis]",
        "terseLabel": "Financial Instrument [Axis]"
       }
      }
     },
     "localname": "FinancialInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Finite-Lived Intangible Asset, Useful Life",
        "terseLabel": "Useful life (in years)"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization": {
     "auth_ref": [
      "r274"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "label": "Finite-Lived Intangible Assets, Accumulated Amortization",
        "negatedTerseLabel": "Accumulated amortization and impairments:"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAccumulatedAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, after Year Five",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths": {
     "auth_ref": [
      "r276"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year One",
        "terseLabel": "2021",
        "verboseLabel": "Amortization in 2021"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive": {
     "auth_ref": [
      "r276"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Five",
        "terseLabel": "2025",
        "verboseLabel": "Amortization in 2025"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour": {
     "auth_ref": [
      "r276"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Four",
        "terseLabel": "2024",
        "verboseLabel": "Amortization in 2024"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree": {
     "auth_ref": [
      "r276"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Three",
        "terseLabel": "2023",
        "verboseLabel": "Amortization in 2023"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo": {
     "auth_ref": [
      "r276"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Two",
        "terseLabel": "2022",
        "verboseLabel": "Amortization in 2022"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": {
     "auth_ref": [
      "r269",
      "r271",
      "r274",
      "r278",
      "r632",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by major type or class of finite-lived intangible assets.",
        "label": "Finite-Lived Intangible Assets by Major Class [Axis]",
        "terseLabel": "Finite-Lived Intangible Assets by Major Class [Axis]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsGross": {
     "auth_ref": [
      "r274",
      "r633"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "label": "Finite-Lived Intangible Assets, Gross",
        "terseLabel": "At inception:"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Finite-Lived Intangible Assets [Line Items]",
        "terseLabel": "Finite-Lived Intangible Assets [Line Items]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": {
     "auth_ref": [
      "r269",
      "r273"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.",
        "label": "Finite-Lived Intangible Assets, Major Class Name [Domain]",
        "terseLabel": "Finite-Lived Intangible Assets, Major Class Name [Domain]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsNet": {
     "auth_ref": [
      "r274",
      "r632"
     ],
     "calculation": {
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "label": "Finite-Lived Intangible Assets, Net",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetEstimatedFutureAmortizationDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FixedIncomeFundsMember": {
     "auth_ref": [
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment that pools funds from investors to invest in a combination of underlying investments, primarily fixed income investments.",
        "label": "Fixed Income Funds [Member]",
        "terseLabel": "Fixed income funds"
       }
      }
     },
     "localname": "FixedIncomeFundsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FixedIncomeSecuritiesMember": {
     "auth_ref": [
      "r339",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investment that provides a return in the form of fixed periodic payments and eventual return of principal at maturity.",
        "label": "Fixed Income Securities [Member]",
        "terseLabel": "Fixed income funds",
        "verboseLabel": "Fixed maturity securities"
       }
      }
     },
     "localname": "FixedIncomeSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FixedMaturitiesMember": {
     "auth_ref": [
      "r810"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element provides types of investments that may be contained within the fixed maturity category which are securities having a stated final repayment date. Examples of items within this category may include bonds, including convertibles and bonds with warrants, and redeemable preferred stocks.",
        "label": "Fixed Maturities [Member]",
        "terseLabel": "Fixed maturity securities"
       }
      }
     },
     "localname": "FixedMaturitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignGovernmentDebtMember": {
     "auth_ref": [
      "r210"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities (such as bonds) issued by a national, local, or municipal government not within the country of domicile of the entity.",
        "label": "Foreign Government Debt [Member]",
        "verboseLabel": "Foreign government bonds"
       }
      }
     },
     "localname": "ForeignGovernmentDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignGovernmentDebtSecuritiesMember": {
     "auth_ref": [
      "r339",
      "r809"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt security issued by government not domiciled in United States of America (US).",
        "label": "Debt Security, Government, Non-US [Member]",
        "verboseLabel": "Foreign government bonds"
       }
      }
     },
     "localname": "ForeignGovernmentDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FuturePolicyBenefitsLiabilityPolicy": {
     "auth_ref": [
      "r761",
      "r763",
      "r764"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for liability for future benefit to be paid to or on behalf of policyholder. Includes, but is not limited to, input, judgment, assumption, and method used in measuring liability and change in input, judgment, and assumption.",
        "label": "Liability for Future Policy Benefit [Policy Text Block]",
        "verboseLabel": "Investment Contract and Life Policy Reserves"
       }
      }
     },
     "localname": "FuturePolicyBenefitsLiabilityPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GainLossOnSaleOfInvestments": {
     "auth_ref": [
      "r106"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.",
        "label": "Gain (Loss) on Sale of Investments",
        "negatedLabel": "Net investment (gains) losses"
       }
      }
     },
     "localname": "GainLossOnSaleOfInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Goodwill": {
     "auth_ref": [
      "r259",
      "r261",
      "r637"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 6.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance",
        "verboseLabel": "Goodwill"
       }
      }
     },
     "localname": "Goodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAcquiredDuringPeriod": {
     "auth_ref": [
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.",
        "label": "Goodwill, Acquired During Period",
        "terseLabel": "Acquisitions"
       }
      }
     },
     "localname": "GoodwillAcquiredDuringPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetImpairment": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 7.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.",
        "label": "Goodwill and Intangible Asset Impairment",
        "terseLabel": "Other expense - goodwill and intangible asset impairments",
        "verboseLabel": "Other expense - goodwill and intangible asset impairments"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetImpairment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Goodwill and Intangible Assets Disclosure [Abstract]",
        "terseLabel": "Goodwill and Intangible Assets Disclosure [Abstract]"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r281"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for goodwill and intangible assets.",
        "label": "Goodwill and Intangible Assets Disclosure [Text Block]",
        "terseLabel": "Goodwill and Intangible Assets, net"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy": {
     "auth_ref": [
      "r117",
      "r264"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for goodwill. This accounting policy also may address how an entity assesses and measures impairment of goodwill, how reporting units are determined, how goodwill is allocated to such units, and how the fair values of the reporting units are determined.",
        "label": "Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]",
        "verboseLabel": "Goodwill"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsGoodwillPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GoodwillImpairmentLoss": {
     "auth_ref": [
      "r106",
      "r260",
      "r263",
      "r265"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill, Impairment Loss",
        "negatedTerseLabel": "Impairments",
        "terseLabel": "Goodwill impairment"
       }
      }
     },
     "localname": "GoodwillImpairmentLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Goodwill [Line Items]",
        "terseLabel": "Goodwill [Line Items]"
       }
      }
     },
     "localname": "GoodwillLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GoodwillRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Goodwill [Roll Forward]",
        "terseLabel": "Goodwill [Roll Forward]"
       }
      }
     },
     "localname": "GoodwillRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember": {
     "auth_ref": [
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments in debentures, bonds and other debt securities issued by the Government National Mortgage Association (GNMA or Ginnie Mae).",
        "label": "Government National Mortgage Association Certificates and Obligations (GNMA) [Member]",
        "terseLabel": "GNMA"
       }
      }
     },
     "localname": "GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfBenefitAxis": {
     "auth_ref": [
      "r673",
      "r767",
      "r807"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by benefit for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Benefit [Axis]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Benefit [Axis]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfBenefitAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfBenefitDomain": {
     "auth_ref": [
      "r673",
      "r767",
      "r807"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Benefit for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Benefit [Domain]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Benefit [Domain]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfBenefitDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GuaranteedMinimumDeathBenefitMember": {
     "auth_ref": [
      "r673",
      "r767",
      "r808"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Feature in an insurance contract that guarantees a minimum amount that will be payable upon the death of the insured.",
        "label": "Guaranteed Minimum Death Benefit [Member]",
        "terseLabel": "Guarantee Minimum Death Benefit"
       }
      }
     },
     "localname": "GuaranteedMinimumDeathBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities, Held-to-maturity, Maturity [Abstract]",
        "verboseLabel": "Fixed maturity securities"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesDebtMaturitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill": {
     "auth_ref": [
      "r106",
      "r279"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.",
        "label": "Impairment of Intangible Assets (Excluding Goodwill)",
        "terseLabel": "Impairment charges of intangible assets"
       }
      }
     },
     "localname": "ImpairmentOfIntangibleAssetsExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairmentOfIntangibleAssetsFinitelived": {
     "auth_ref": [
      "r106",
      "r279"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.",
        "label": "Impairment of Intangible Assets, Finite-lived",
        "terseLabel": "Impairment of finite lived intangible assets"
       }
      }
     },
     "localname": "ImpairmentOfIntangibleAssetsFinitelived",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill": {
     "auth_ref": [
      "r106",
      "r279"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.",
        "label": "Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)",
        "negatedTerseLabel": "Impairments",
        "verboseLabel": "Impairment of infinite lived intangible assets"
       }
      }
     },
     "localname": "ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairmentOfInvestments": {
     "auth_ref": [
      "r209"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.",
        "label": "Other than Temporary Impairment Losses, Investments",
        "negatedTotalLabel": "Total other-than-temporary impairment losses on securities"
       }
      }
     },
     "localname": "ImpairmentOfInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r74",
      "r181",
      "r187",
      "r191",
      "r194",
      "r197",
      "r634",
      "r653",
      "r660",
      "r710"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.",
        "label": "Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest",
        "totalLabel": "Income before income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments": {
     "auth_ref": [
      "r124",
      "r181",
      "r187",
      "r191",
      "r194",
      "r197"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails": {
       "order": 1.0,
       "parentTag": "hmn_LossBeforeEquityInNetIncomeOfConsolidatedSubsidiariesAfterTax",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.",
        "label": "Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest",
        "terseLabel": "Loss before income tax benefit and equity in net earnings of subsidiaries"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Statement [Abstract]",
        "terseLabel": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r285"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]",
        "terseLabel": "Income Statement Location [Axis]"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]",
        "terseLabel": "Income Statement Location [Domain]"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Tax Disclosure [Abstract]",
        "terseLabel": "Income Tax Disclosure [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r468",
      "r475",
      "r481",
      "r490",
      "r495",
      "r497",
      "r498",
      "r499"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.",
        "label": "Income Tax Disclosure [Text Block]",
        "verboseLabel": "Income Taxes"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r119",
      "r142",
      "r143",
      "r179",
      "r466",
      "r491",
      "r496",
      "r711"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      },
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails": {
       "order": 2.0,
       "parentTag": "hmn_LossBeforeEquityInNetIncomeOfConsolidatedSubsidiariesAfterTax",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income Tax Expense (Benefit)",
        "terseLabel": "Income tax benefit",
        "totalLabel": "Total income tax expense",
        "verboseLabel": "Income tax expense"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails",
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxPolicyTextBlock": {
     "auth_ref": [
      "r70",
      "r117",
      "r463",
      "r464",
      "r475",
      "r476",
      "r480",
      "r486",
      "r847"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.",
        "label": "Income Tax, Policy [Policy Text Block]",
        "verboseLabel": "Income Taxes"
       }
      }
     },
     "localname": "IncomeTaxPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxReconciliationDeductionsDividends": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.",
        "label": "Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount",
        "negatedLabel": "Dividend received deduction"
       }
      }
     },
     "localname": "IncomeTaxReconciliationDeductionsDividends",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.",
        "label": "Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount",
        "verboseLabel": "Expected federal tax on income"
       }
      }
     },
     "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 9.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible impairment loss.",
        "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount",
        "terseLabel": "Goodwill impairment"
       }
      }
     },
     "localname": "IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.",
        "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount",
        "terseLabel": "Employee share-based compensation"
       }
      }
     },
     "localname": "IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationOtherAdjustments": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.",
        "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Amount",
        "terseLabel": "Other, net"
       }
      }
     },
     "localname": "IncomeTaxReconciliationOtherAdjustments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationOtherReconcilingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract]",
        "terseLabel": "Add (deduct) tax effects of:"
       }
      }
     },
     "localname": "IncomeTaxReconciliationOtherReconcilingItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 7.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).",
        "label": "Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount",
        "terseLabel": "Prior year adjustments"
       }
      }
     },
     "localname": "IncomeTaxReconciliationPriorYearIncomeTaxes",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxReconciliationTaxExemptIncome": {
     "auth_ref": [
      "r467"
     ],
     "calculation": {
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeTaxExpenseBenefit",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.",
        "label": "Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount",
        "negatedLabel": "Tax-exempt interest"
       }
      }
     },
     "localname": "IncomeTaxReconciliationTaxExemptIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofEffectiveTaxExpenseDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaid": {
     "auth_ref": [
      "r102",
      "r111"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.",
        "label": "Income Taxes Paid",
        "terseLabel": "Income taxes"
       }
      }
     },
     "localname": "IncomeTaxesPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaidNet": {
     "auth_ref": [
      "r111"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.",
        "label": "Income Taxes Paid, Net",
        "negatedLabel": "Income taxes"
       }
      }
     },
     "localname": "IncomeTaxesPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in investment income that has been earned but not yet received in cash.",
        "label": "Increase (Decrease) in Accrued Investment Income Receivable",
        "negatedTerseLabel": "Accrued investment income"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccruedInvestmentIncomeReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInDeferredIncomeTaxes": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.",
        "label": "Increase (Decrease) in Deferred Income Taxes",
        "negatedTerseLabel": "Income tax liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInDeferredIncomeTaxes",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.",
        "label": "Increase (Decrease) in Deferred Policy Acquisition Costs",
        "negatedTerseLabel": "Deferred policy acquisition costs"
       }
      }
     },
     "localname": "IncreaseDecreaseInDeferredPolicyAcquisitionCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInInsuranceLiabilities": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) in insurance liability balances during the period.",
        "label": "Increase (Decrease) in Insurance Liabilities",
        "terseLabel": "Insurance liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInInsuranceLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Increase (Decrease) in Operating Capital [Abstract]",
        "terseLabel": "Changes in:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.",
        "label": "Increase (Decrease) in Other Operating Assets and Liabilities, Net",
        "negatedTerseLabel": "Other operating assets and liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingCapitalNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPremiumsReceivable": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The change in the premium receivable balance on the balance sheet.",
        "label": "Increase (Decrease) in Premiums Receivable",
        "negatedTerseLabel": "Premium receivables"
       }
      }
     },
     "localname": "IncreaseDecreaseInPremiumsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInReinsuranceRecoverable": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the amount of benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date for all guaranteed benefit types.",
        "label": "Increase (Decrease) in Reinsurance Recoverable",
        "negatedTerseLabel": "Reinsurance recoverables"
       }
      }
     },
     "localname": "IncreaseDecreaseInReinsuranceRecoverable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInStockholdersEquityRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Increase (Decrease) in Stockholders' Equity [Roll Forward]",
        "terseLabel": "Increase (Decrease) in Stockholders' Equity [Roll Forward]"
       }
      }
     },
     "localname": "IncreaseDecreaseInStockholdersEquityRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis": {
     "auth_ref": [
      "r270",
      "r277"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type or class of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.",
        "label": "Indefinite-lived Intangible Assets [Axis]",
        "terseLabel": "Indefinite-lived Intangible Assets [Axis]"
       }
      }
     },
     "localname": "IndefiniteLivedIntangibleAssetsByMajorClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Indefinite-lived Intangible Assets [Line Items]",
        "terseLabel": "Indefinite-lived Intangible Assets [Line Items]"
       }
      }
     },
     "localname": "IndefiniteLivedIntangibleAssetsByMajorClassLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill": {
     "auth_ref": [
      "r277"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.",
        "label": "Indefinite-lived Intangible Assets (Excluding Goodwill)",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance"
       }
      }
     },
     "localname": "IndefiniteLivedIntangibleAssetsExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain": {
     "auth_ref": [
      "r270",
      "r277"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The major class of indefinite-lived intangible asset (for example, trade names, etc. but not all-inclusive), excluding goodwill. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of the company.",
        "label": "Indefinite-lived Intangible Assets, Major Class Name [Domain]",
        "terseLabel": "Indefinite-lived Intangible Assets, Major Class Name [Domain]"
       }
      }
     },
     "localname": "IndefiniteLivedIntangibleAssetsMajorClassNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IndefiniteLivedIntangibleAssetsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Indefinite-lived Intangible Assets [Roll Forward]",
        "terseLabel": "Indefinite-lived Intangible Assets [Roll Forward]"
       }
      }
     },
     "localname": "IndefiniteLivedIntangibleAssetsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IndefinitelivedIntangibleAssetsAcquired": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.",
        "label": "Indefinite-lived Intangible Assets Acquired",
        "terseLabel": "Acquisitions"
       }
      }
     },
     "localname": "IndefinitelivedIntangibleAssetsAcquired",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IndustrialMiscellaneousAndAllOthersMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents investments by the reporting entity in equity securities issued by any type of company other than public utilities, banks, trusts, and insurance companies the investments in which are summarized elsewhere.",
        "label": "Industrial, Miscellaneous, and All Others [Member]",
        "terseLabel": "Industrial, miscellaneous and all other"
       }
      }
     },
     "localname": "IndustrialMiscellaneousAndAllOthersMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InsuranceAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Insurance [Abstract]",
        "terseLabel": "Insurance [Abstract]"
       }
      }
     },
     "localname": "InsuranceAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InsuranceLossReservesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Insurance Loss Reserves [Abstract]",
        "terseLabel": "Insurance Loss Reserves [Abstract]"
       }
      }
     },
     "localname": "InsuranceLossReservesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InsurancePremiumsRevenueRecognitionPolicy": {
     "auth_ref": [
      "r793"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue recognition of insurance premium. Includes, but is not limited to, basis for measurement and timing of recognition of revenue from insurance premium received from contract holder and method used in performing premium deficiency testing.",
        "label": "Insurance Premiums Revenue Recognition, Policy [Policy Text Block]",
        "verboseLabel": "Insurance Premiums and Contract Charges Earned"
       }
      }
     },
     "localname": "InsurancePremiumsRevenueRecognitionPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IntangibleAssetsNetExcludingGoodwill": {
     "auth_ref": [
      "r267",
      "r272"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.",
        "label": "Intangible Assets, Net (Excluding Goodwill)",
        "terseLabel": "Intangible assets"
       }
      }
     },
     "localname": "IntangibleAssetsNetExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndDividendIncomeOperating": {
     "auth_ref": [
      "r658"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_NetInvestmentIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.",
        "label": "Interest and Dividend Income, Operating",
        "terseLabel": "Investment income"
       }
      }
     },
     "localname": "InterestAndDividendIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestCreditedToPolicyholdersAccountBalances": {
     "auth_ref": [
      "r668",
      "r708",
      "r765",
      "r769",
      "r771"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of interest expense for allocation to policyholder account balance.",
        "label": "Policyholder Account Balance, Interest Expense",
        "verboseLabel": "Interest credited"
       }
      }
     },
     "localname": "InterestCreditedToPolicyholdersAccountBalances",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpense": {
     "auth_ref": [
      "r72",
      "r175",
      "r577",
      "r580",
      "r659"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 6.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.",
        "label": "Interest Expense",
        "terseLabel": "Interest expense",
        "verboseLabel": "Interest expense"
       }
      }
     },
     "localname": "InterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseOnPrepetitionLiabilitiesPolicy": {
     "auth_ref": [
      "r117",
      "r598"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for interest obligations on prepetition liabilities.",
        "label": "Interest Expense on Prepetition Liabilities, Policy [Policy Text Block]",
        "verboseLabel": "Reserves for Fixed Indexed Annuities and Indexed Universal Life Products"
       }
      }
     },
     "localname": "InterestExpenseOnPrepetitionLiabilitiesPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r98",
      "r101",
      "r111"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Interest Paid, Excluding Capitalized Interest, Operating Activities",
        "terseLabel": "Interest"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IntersegmentEliminationMember": {
     "auth_ref": [
      "r173",
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r193",
      "r197"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Eliminating entries used in operating segment consolidation.",
        "label": "Intersegment Eliminations [Member]",
        "terseLabel": "Intersegment eliminations"
       }
      }
     },
     "localname": "IntersegmentEliminationMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentHoldingsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Investment Holdings [Line Items]",
        "terseLabel": "Investment Holdings [Line Items]"
       }
      }
     },
     "localname": "InvestmentHoldingsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentHoldingsTable": {
     "auth_ref": [
      "r820",
      "r830",
      "r839",
      "r840"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The investment holdings table is used for any listing of investments. The \"Investment [Axis]\" identifies the investment for which the line items apply. The other axes are used for categorizing the investments and creating useful subtotals. These axes cover different categorizations. The appropriate axes are expected to be used. Additional axes can be added for alternative categorizations.",
        "label": "Investment Holdings [Table]",
        "terseLabel": "Investment Holdings [Table]"
       }
      }
     },
     "localname": "InvestmentHoldingsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentIncomeInvestmentExpense": {
     "auth_ref": [
      "r83",
      "r712"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_NetInvestmentIncome",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses related to the generation of investment income.",
        "label": "Investment Income, Investment Expense",
        "negatedLabel": "Investment expenses"
       }
      }
     },
     "localname": "InvestmentIncomeInvestmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeTextBlock": {
     "auth_ref": [
      "r81",
      "r82",
      "r83",
      "r712"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of investment income, including, but not limited to, interest and dividend income and amortization of discount (premium) derived from debt and equity securities. Excludes realized and unrealized gain (loss) on investments.",
        "label": "Investment Income [Table Text Block]",
        "verboseLabel": "Components of net investment income"
       }
      }
     },
     "localname": "InvestmentIncomeTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentPolicyTextBlock": {
     "auth_ref": [
      "r235",
      "r706"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for investment in financial asset.",
        "label": "Investment, Policy [Policy Text Block]",
        "verboseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentTypeAxis": {
     "auth_ref": [
      "r821",
      "r822",
      "r823",
      "r824",
      "r825",
      "r826",
      "r827",
      "r828",
      "r829",
      "r837",
      "r838",
      "r841",
      "r842",
      "r843",
      "r844"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of investments.",
        "label": "Investment Type [Axis]",
        "terseLabel": "Investment Type [Axis]"
       }
      }
     },
     "localname": "InvestmentTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentTypeCategorizationMember": {
     "auth_ref": [
      "r821",
      "r822",
      "r823",
      "r824",
      "r825",
      "r826",
      "r827",
      "r828",
      "r829",
      "r837",
      "r838",
      "r841",
      "r842",
      "r843",
      "r844"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Asset obtained to generate income or appreciate in value.",
        "label": "Investments [Domain]",
        "terseLabel": "Investments [Domain]"
       }
      }
     },
     "localname": "InvestmentTypeCategorizationMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Investments": {
     "auth_ref": [
      "r695"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all investments.",
        "label": "Investments",
        "totalLabel": "Total investments"
       }
      }
     },
     "localname": "Investments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investments [Abstract]",
        "terseLabel": "Investments",
        "verboseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsAndCash": {
     "auth_ref": [
      "r696"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of investments and unrestricted cash as of the balance sheet date.",
        "label": "Investments and Cash",
        "verboseLabel": "Investments and cash"
       }
      }
     },
     "localname": "InvestmentsAndCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.",
        "label": "Investments Classified by Contractual Maturity Date [Table Text Block]",
        "verboseLabel": "Distribution of the company's fixed maturity portfolio by estimated expected maturity"
       }
      }
     },
     "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investments, Debt and Equity Securities [Abstract]",
        "terseLabel": "Investments, Debt and Equity Securities [Abstract]"
       }
      }
     },
     "localname": "InvestmentsDebtAndEquitySecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures": {
     "auth_ref": [
      "r23"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in equity method investee and investment in and advance to affiliate.",
        "label": "Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures",
        "terseLabel": "Limited partnership interests",
        "verboseLabel": "Investment in subsidiaries"
       }
      }
     },
     "localname": "InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/InvestmentsNarrativeDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r232",
      "r635",
      "r662",
      "r846"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for  investments in certain debt and equity securities.",
        "label": "Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]",
        "verboseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/Investments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeaseCost": {
     "auth_ref": [
      "r594",
      "r596"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lease cost recognized by lessee for lease contract.",
        "label": "Lease, Cost",
        "totalLabel": "Total lease cost"
       }
      }
     },
     "localname": "LeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LeaseCostTableTextBlock": {
     "auth_ref": [
      "r594"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.",
        "label": "Lease, Cost [Table Text Block]",
        "terseLabel": "Schedule of components lease expense"
       }
      }
     },
     "localname": "LeaseCostTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeasesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Leases [Abstract]",
        "terseLabel": "Leases [Abstract]"
       }
      }
     },
     "localname": "LeasesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeLeaseDescriptionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Lessee, Lease, Description [Line Items]",
        "terseLabel": "Lessee, Lease, Description [Line Items]"
       }
      }
     },
     "localname": "LesseeLeaseDescriptionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeLeaseDescriptionTable": {
     "auth_ref": [
      "r588"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about lessee's leases.",
        "label": "Lessee, Lease, Description [Table]",
        "terseLabel": "Lessee, Lease, Description [Table]"
       }
      }
     },
     "localname": "LesseeLeaseDescriptionTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": {
     "auth_ref": [
      "r595"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.",
        "label": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]",
        "terseLabel": "Schedule of future minimum lease payments under non-cancellable operating leases"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.",
        "label": "Lessee, Operating Lease, Liability, to be Paid",
        "totalLabel": "Total future minimum lease payments"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 6.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, after Year Five",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year One",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 5.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Five",
        "terseLabel": "2025"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 4.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Four",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 3.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Three",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails_1": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Two",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r595"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.",
        "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount",
        "negatedTerseLabel": "Less imputed interest"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseRemainingLeaseTerm": {
     "auth_ref": [
      "r586"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessee, Operating Lease, Remaining Lease Term",
        "terseLabel": "Remaining lease term"
       }
      }
     },
     "localname": "LesseeOperatingLeaseRemainingLeaseTerm",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_LesseeOperatingLeaseRenewalTerm": {
     "auth_ref": [
      "r587"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessee, Operating Lease, Renewal Term",
        "terseLabel": "Renewal term"
       }
      }
     },
     "localname": "LesseeOperatingLeaseRenewalTerm",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_LesseeOperatingLeasesTextBlock": {
     "auth_ref": [
      "r597"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.",
        "label": "Lessee, Operating Leases [Text Block]",
        "terseLabel": "Operating Leases"
       }
      }
     },
     "localname": "LesseeOperatingLeasesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r30",
      "r118",
      "r189",
      "r236",
      "r514",
      "r518",
      "r519",
      "r568"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r21",
      "r118",
      "r236",
      "r568",
      "r644",
      "r690"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.",
        "label": "Liabilities and Equity",
        "totalLabel": "Total liabilities and shareholders' equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "terseLabel": "LIABILITIES AND SHAREHOLDERS' EQUITY",
        "verboseLabel": "LIABILITIES AND SHAREHOLDERS' EQUITY"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liabilities, Fair Value Disclosure [Abstract]",
        "verboseLabel": "Financial Liabilities"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis": {
     "auth_ref": [
      "r751"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of catastrophic event, for example, but not limited to, earthquake, windstorm, fire or explosion.",
        "label": "Catastrophic Event [Axis]",
        "terseLabel": "Catastrophic Event [Axis]"
       }
      }
     },
     "localname": "LiabilityForCatastropheClaimsByCatastrophicEventAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r747",
      "r750"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "hmn_PolicyLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.",
        "label": "Liability for Claims and Claims Adjustment Expense",
        "periodEndLabel": "Gross reserves, end of year",
        "periodStartLabel": "Gross reserves, beginning of year",
        "terseLabel": "Gross reserves, end of year",
        "verboseLabel": "Unpaid claims and claim expenses"
       }
      }
     },
     "localname": "LiabilityForClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefits": {
     "auth_ref": [
      "r674",
      "r760",
      "r762",
      "r770",
      "r778"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "hmn_PolicyLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.",
        "label": "Liability for Future Policy Benefit, before Reinsurance",
        "totalLabel": "Total",
        "verboseLabel": "Investment contract and policy reserves"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock": {
     "auth_ref": [
      "r785"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for liabilities related to future policy benefits and unpaid claims and claim adjustments.",
        "label": "Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]",
        "verboseLabel": "Unpaid Claims and Claim Expenses"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpenses"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts": {
     "auth_ref": [
      "r697",
      "r745"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilityForFuturePolicyBenefits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts.",
        "label": "Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts",
        "terseLabel": "Investment contract reserves"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefitsLife": {
     "auth_ref": [
      "r697",
      "r745"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilityForFuturePolicyBenefits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accrued obligation to policyholders that relates to insured events under long-term life insurance contracts.",
        "label": "Liability for Future Policy Benefits, Life",
        "verboseLabel": "Policy reserves"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitsLife",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesInvestmentContractandLifePolicyReservesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]",
        "verboseLabel": "Claims and claim expense payments for claims occurring during:"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1": {
     "auth_ref": [
      "r749"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year",
        "verboseLabel": "Current year"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1": {
     "auth_ref": [
      "r749"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years",
        "verboseLabel": "Prior years"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1": {
     "auth_ref": [
      "r748"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims",
        "totalLabel": "Total claims and claim expenses incurred"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]",
        "verboseLabel": "Incurred claims and claim expenses:"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet": {
     "auth_ref": [
      "r675",
      "r747",
      "r750"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Net",
        "periodEndLabel": "Net reserves, end of year",
        "periodStartLabel": "Net reserves, beginning of year"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]",
        "terseLabel": "Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LicenseMember": {
     "auth_ref": [
      "r310"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Right to use intangible asset. Intangible asset includes, but is not limited to, patent, copyright, technology, manufacturing process, software or trademark.",
        "label": "License [Member]",
        "terseLabel": "State licenses"
       }
      }
     },
     "localname": "LicenseMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LineOfCredit": {
     "auth_ref": [
      "r11",
      "r642",
      "r677"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
        "label": "Long-term Line of Credit",
        "terseLabel": "Senior revolving credit facility"
       }
      }
     },
     "localname": "LineOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityCommitmentFeePercentage": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.",
        "label": "Line of Credit Facility, Commitment Fee Percentage",
        "terseLabel": "Commitment fee percent"
       }
      }
     },
     "localname": "LineOfCreditFacilityCommitmentFeePercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": {
     "auth_ref": [
      "r29"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.",
        "label": "Line of Credit Facility, Maximum Borrowing Capacity",
        "terseLabel": "Borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityMaximumBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars.",
        "label": "Line of Credit [Member]",
        "terseLabel": "Line of Credit"
       }
      }
     },
     "localname": "LineOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LondonInterbankOfferedRateLIBORMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.",
        "label": "London Interbank Offered Rate (LIBOR) [Member]",
        "terseLabel": "London Interbank Offered Rate (LIBOR)"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBORMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongTermDebt": {
     "auth_ref": [
      "r11",
      "r296",
      "r642",
      "r684"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtAndCapitalLeaseObligations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Long-term Debt",
        "verboseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Long-term Debt, Unclassified [Abstract]",
        "terseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebtAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongTermDebtFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.",
        "label": "Long-term Debt, Fair Value",
        "verboseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer.",
        "label": "Long-term Debt [Member]",
        "terseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongtermDebtTypeAxis": {
     "auth_ref": [
      "r32"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-term debt.",
        "label": "Long-term Debt, Type [Axis]",
        "terseLabel": "Long-term Debt, Type [Axis]"
       }
      }
     },
     "localname": "LongtermDebtTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongtermDebtTypeDomain": {
     "auth_ref": [
      "r32",
      "r295"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.",
        "label": "Long-term Debt, Type [Domain]",
        "terseLabel": "Long-term Debt, Type [Domain]"
       }
      }
     },
     "localname": "LongtermDebtTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LossFromCatastrophes": {
     "auth_ref": [
      "r83"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake).",
        "label": "Loss from Catastrophes",
        "terseLabel": "Losses incurred for catastrophe claims, carrying amount"
       }
      }
     },
     "localname": "LossFromCatastrophes",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MarketApproachValuationTechniqueMember": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation approach using price and other relevant information generated by market transaction involving identical or comparable asset, liability, or group of assets and liabilities.",
        "label": "Valuation, Market Approach [Member]",
        "terseLabel": "market comparable"
       }
      }
     },
     "localname": "MarketApproachValuationTechniqueMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputConstantPrepaymentRateMember": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input using principal prepayment as proportion of outstanding loan principal at constant rate.",
        "label": "Measurement Input, Constant Prepayment Rate [Member]",
        "terseLabel": "constant prepayment rate"
       }
      }
     },
     "localname": "MeasurementInputConstantPrepaymentRateMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputTypeAxis": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Axis]",
        "terseLabel": "Measurement Input Type [Axis]"
       }
      }
     },
     "localname": "MeasurementInputTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MeasurementInputTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Domain]",
        "terseLabel": "Measurement Input Type [Domain]"
       }
      }
     },
     "localname": "MeasurementInputTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember": {
     "auth_ref": [
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities collateralized by real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac).",
        "label": "Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]",
        "terseLabel": "Government mortgage-backed securities",
        "verboseLabel": "Mortgage-backed securities"
       }
      }
     },
     "localname": "MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MortgageBackedSecuritiesOtherMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities collateralized by other mortgage loans.",
        "label": "Mortgage Backed Securities, Other [Member]",
        "terseLabel": "Other asset-backed securities",
        "verboseLabel": "Other asset-backed securities"
       }
      }
     },
     "localname": "MortgageBackedSecuritiesOtherMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MortgagesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A loan to finance the purchase of real estate where the lender has a lien on the property as collateral for the loan.",
        "label": "Mortgages [Member]",
        "verboseLabel": "Mortgage loans"
       }
      }
     },
     "localname": "MortgagesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MunicipalBondsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Long-term debt securities issued by state, city or local governments or the agencies operated by state, city or local governments.",
        "label": "Municipal Bonds [Member]",
        "terseLabel": "Municipal bonds",
        "verboseLabel": "Municipal bonds"
       }
      }
     },
     "localname": "MunicipalBondsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Net Amount at Risk by Product and Guarantee [Line Items]",
        "terseLabel": "Net Amount at Risk by Product and Guarantee [Line Items]"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeTable": {
     "auth_ref": [
      "r673",
      "r806"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For contracts with guaranteed benefits in excess of the current account balance, sets forth the amounts of such excesses (the net amounts at risk) and other pertinent information by type of guarantee by type of insurance product), as of the most recent balance sheet date.",
        "label": "Net Amount at Risk, by Product and Guarantee [Table]",
        "terseLabel": "Net Amount at Risk, by Product and Guarantee [Table]"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesGuaranteedMinimumDeathBenefitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r99"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_CashPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "Net Cash Provided by (Used in) Financing Activities",
        "totalLabel": "Net cash provided by (used in) financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "terseLabel": "Cash flows from financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]",
        "verboseLabel": "Cash flows from financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r99"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_CashPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.",
        "label": "Net Cash Provided by (Used in) Investing Activities",
        "totalLabel": "Net cash (used in) provided by investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]",
        "terseLabel": "Cash flows from investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]",
        "verboseLabel": "Cash flows from investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r99",
      "r104",
      "r107"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_CashPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "Net Cash Provided by (Used in) Operating Activities",
        "totalLabel": "Net cash provided by operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Cash flows from operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]",
        "verboseLabel": "Cash flows from operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetChangeAnnuitiesAndInvestmentCertificatesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Change Annuities and Investment Certificates [Abstract]",
        "terseLabel": "Annuity contracts: variable, fixed and FHLB funding agreements"
       }
      }
     },
     "localname": "NetChangeAnnuitiesAndInvestmentCertificatesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetChangeContractHoldersFundsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Change Contract Holders Funds [Abstract]",
        "verboseLabel": "Life policy accounts"
       }
      }
     },
     "localname": "NetChangeContractHoldersFundsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r2",
      "r64",
      "r67",
      "r75",
      "r107",
      "r118",
      "r132",
      "r136",
      "r137",
      "r138",
      "r139",
      "r142",
      "r143",
      "r147",
      "r181",
      "r187",
      "r191",
      "r194",
      "r197",
      "r236",
      "r568",
      "r654",
      "r701"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.",
        "label": "Net Income (Loss) Attributable to Parent",
        "terseLabel": "Net income",
        "totalLabel": "Net income",
        "verboseLabel": "Net income"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetInvestmentIncome": {
     "auth_ref": [
      "r703"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.",
        "label": "Net Investment Income",
        "totalLabel": "Total net investment income",
        "verboseLabel": "Net investment income"
       }
      }
     },
     "localname": "NetInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.",
        "label": "New Accounting Pronouncements, Policy [Policy Text Block]",
        "verboseLabel": "Adoption of New Accounting Standards and Future Adoption of New Accounting Standards"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NonqualifiedPlanMember": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan without tax-exempt status in accordance with applicable tax provision of designated taxing authority. Taxing authority includes, but is not limited to, U.S. Internal Revenue Service (IRS). Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Nonqualified Plan [Member]",
        "terseLabel": "Nonqualified Plan"
       }
      }
     },
     "localname": "NonqualifiedPlanMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NonredeemablePreferredStockMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Preferred shares that are not redeemable before liquidation of the entity. Preferred shares may provide a preferential dividend to the dividend on common stock and may take precedence over common stock in the event of a liquidation. Preferred shares typically represent an ownership interest in the company.",
        "label": "Nonredeemable Preferred Stock [Member]",
        "verboseLabel": "Non-redeemable preferred stocks"
       }
      }
     },
     "localname": "NonredeemablePreferredStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NumberOfOperatingSegments": {
     "auth_ref": [
      "r169"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.",
        "label": "Number of Operating Segments",
        "terseLabel": "Number of operating segments"
       }
      }
     },
     "localname": "NumberOfOperatingSegments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_NumberOfReportableSegments": {
     "auth_ref": [
      "r169"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.",
        "label": "Number of Reportable Segments",
        "terseLabel": "Number of reportable segments"
       }
      }
     },
     "localname": "NumberOfReportableSegments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent": {
     "auth_ref": [
      "r60",
      "r71"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.",
        "label": "OCI, before Reclassifications, Net of Tax, Attributable to Parent",
        "terseLabel": "Other comprehensive income (loss) before reclassifications"
       }
      }
     },
     "localname": "OciBeforeReclassificationsNetOfTaxAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OffsettingDerivativeAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Offsetting Derivative Assets [Abstract]",
        "verboseLabel": "Asset derivatives"
       }
      }
     },
     "localname": "OffsettingDerivativeAssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingLeaseCost": {
     "auth_ref": [
      "r589",
      "r596"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.",
        "label": "Operating Lease, Cost",
        "terseLabel": "Operating lease cost"
       }
      }
     },
     "localname": "OperatingLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r583"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "label": "Operating Lease, Liability",
        "terseLabel": "Total",
        "verboseLabel": "Operating lease liabilities, included in Other liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails",
      "http://www.horacemann.com/role/OperatingLeasesFutureMinimumOperatingLeasePaymentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList": {
     "auth_ref": [
      "r584"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates line item in statement of financial position that includes operating lease liability.",
        "label": "Operating Lease, Liability, Statement of Financial Position [Extensible List]",
        "terseLabel": "Operating Lease, Liability, Statement of Financial Position [Extensible List]"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails"
     ],
     "xbrltype": "extensibleListItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r585",
      "r591"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.",
        "label": "Operating Lease, Payments",
        "terseLabel": "Cash paid for amounts included in the measurement of lease liabilities"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesSupplementalCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r582"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of lessee's right to use underlying asset under operating lease.",
        "label": "Operating Lease, Right-of-Use Asset",
        "terseLabel": "Right of use assets, included in Other assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r593",
      "r596"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average discount rate for operating lease calculated at point in time.",
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "terseLabel": "Weighted average discount rate"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r592",
      "r596"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Operating Lease, Weighted Average Remaining Lease Term",
        "terseLabel": "Weighted average remaining lease term"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesBalanceSheetInformationDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OperatingSegmentsMember": {
     "auth_ref": [
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r197"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Operating Segments [Member]",
        "terseLabel": "Operating Segments"
       }
      }
     },
     "localname": "OperatingSegmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]",
        "terseLabel": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherAssets": {
     "auth_ref": [
      "r8",
      "r638",
      "r679"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 7.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of assets classified as other.",
        "label": "Other Assets",
        "verboseLabel": "Other assets"
       }
      }
     },
     "localname": "OtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent": {
     "auth_ref": [
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 2.0,
       "parentTag": "hmn_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParentBeforeCumulativeEffectOfChangeInAccountingPrinciple",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.",
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent",
        "totalLabel": "Total, before tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent [Abstract]",
        "terseLabel": "Change in net unrealized investment gains (losses) on fixed maturity securities:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.",
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent",
        "netLabel": "Change in net unrealized investment gains (losses) on fixed maturity securities",
        "verboseLabel": "Change in net unrealized investment gains (losses) on fixed maturity securities"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent": {
     "auth_ref": [
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 1.0,
       "parentTag": "hmn_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParentBeforeCumulativeEffectOfChangeInAccountingPrinciple",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.",
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent",
        "terseLabel": "Income tax expense (benefit)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax": {
     "auth_ref": [
      "r55",
      "r57",
      "r358"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax",
        "terseLabel": "Prior service cost"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent": {
     "auth_ref": [
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive (income) loss for defined benefit plan, attributable to parent entity.",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent",
        "negatedTerseLabel": "Before tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r54",
      "r57",
      "r511",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
       "weight": -1.0
      },
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent",
        "negatedLabel": "Change in net funded status of benefit plans",
        "negatedTerseLabel": "Change in net funded status of benefit plans",
        "negatedTotalLabel": "Total, net of tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent [Abstract]",
        "terseLabel": "Change in net funded status of benefit plans:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent": {
     "auth_ref": [
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent",
        "negatedTerseLabel": "Income tax expense (benefit)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax": {
     "auth_ref": [
      "r57",
      "r61",
      "r62",
      "r358"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax",
        "negatedTerseLabel": "Prior service cost"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": {
     "auth_ref": [
      "r48",
      "r49",
      "r57"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.",
        "label": "OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax",
        "terseLabel": "Change in net unrealized investment gains (losses) on fixed maturity securities"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Comprehensive Income (Loss), Net of Tax [Abstract]",
        "verboseLabel": "Other comprehensive income (loss), net of tax:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r65",
      "r68",
      "r511",
      "r512",
      "r516"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of other comprehensive income (loss) attributable to parent entity.",
        "label": "Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent",
        "terseLabel": "Net current period other comprehensive income (loss)",
        "totalLabel": "Other comprehensive income (loss)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax": {
     "auth_ref": [
      "r54",
      "r57",
      "r358",
      "r388"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.",
        "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax",
        "totalLabel": "Total recognized in other comprehensive income (loss)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax": {
     "auth_ref": [
      "r52",
      "r57",
      "r358"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.",
        "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax",
        "negatedLabel": "Net actuarial loss (gain)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax": {
     "auth_ref": [
      "r57",
      "r61",
      "r62",
      "r231"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.",
        "label": "Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax",
        "netLabel": "Less: reclassification adjustment for net investment gains (losses) included in income before income tax",
        "verboseLabel": "Reclassification adjustment for net investment gains (losses) included in income before income tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax": {
     "auth_ref": [
      "r57",
      "r61",
      "r62",
      "r231"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.",
        "label": "Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax",
        "negatedLabel": "Reclassification of net investment (gains) losses on securities to net income"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax": {
     "auth_ref": [
      "r58",
      "r231"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.",
        "label": "Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax",
        "terseLabel": "Other tax expense (benefit)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax": {
     "auth_ref": [
      "r57",
      "r61",
      "r62",
      "r358"
     ],
     "calculation": {
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.",
        "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax",
        "terseLabel": "Actuarial loss"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax": {
     "auth_ref": [
      "r48",
      "r57",
      "r231"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before tax and adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.",
        "label": "OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax",
        "terseLabel": "Net unrealized investment gains (losses) on securities arising during the period"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossComponentsofComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherIncome": {
     "auth_ref": [
      "r714"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 4.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue and income classified as other.",
        "label": "Other Income",
        "verboseLabel": "Other income"
       }
      }
     },
     "localname": "OtherIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherInsuranceProductLineMember": {
     "auth_ref": [
      "r772"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contract providing insurance coverage, classified as other.",
        "label": "Insurance, Other [Member]",
        "verboseLabel": "Other, including consolidating eliminations"
       }
      }
     },
     "localname": "OtherInsuranceProductLineMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherInvestments": {
     "auth_ref": [
      "r23",
      "r694"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investments classified as other.",
        "label": "Other Investments",
        "terseLabel": "Other investments"
       }
      }
     },
     "localname": "OtherInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r648"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liabilities classified as other.",
        "label": "Other Liabilities",
        "terseLabel": "Other liabilities",
        "verboseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesMember": {
     "auth_ref": [
      "r526",
      "r540"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other liabilities.",
        "label": "Other Liabilities [Member]",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherLongTermInvestmentsMember": {
     "auth_ref": [
      "r809"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Long-term investments classified as other.",
        "label": "Other Long-term Investments [Member]",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "OtherLongTermInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherNonoperatingExpense": {
     "auth_ref": [
      "r83"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expense related to nonoperating activities, classified as other.",
        "label": "Other Nonoperating Expense",
        "verboseLabel": "Other"
       }
      }
     },
     "localname": "OtherNonoperatingExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherOperatingActivitiesCashFlowStatement": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example,  cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).",
        "label": "Other Operating Activities, Cash Flow Statement",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "OtherOperatingActivitiesCashFlowStatement",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses": {
     "auth_ref": [
      "r228"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which a previous OTTI was recognized and the investor does not intend to sell the debt security and it is not more likely than not that the investor will be required to sell the debt security before recovery of its amortized cost basis.",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses",
        "verboseLabel": "Increases to previously recognized credit losses"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment": {
     "auth_ref": [
      "r226"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which no such other than temporary impairment (OTTI) was previously recognized.",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment",
        "verboseLabel": "New credit losses"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld": {
     "auth_ref": [
      "r225",
      "r229"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held",
        "periodEndLabel": "End of period",
        "periodStartLabel": "Beginning of period"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold": {
     "auth_ref": [
      "r227"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period.",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold",
        "negatedLabel": "Losses related to securities sold or paid down during the period"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]",
        "verboseLabel": "Cumulative credit loss"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsCreditLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock": {
     "auth_ref": [
      "r224"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income.",
        "label": "Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]",
        "verboseLabel": "Summary of cumulative credit losses"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings": {
     "auth_ref": [
      "r209"
     ],
     "calculation": {
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings.",
        "label": "Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Recognized in Earnings",
        "negatedLabel": "Credit impairment write-downs"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings": {
     "auth_ref": [
      "r209"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_ImpairmentOfInvestments",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings.",
        "label": "Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings",
        "negatedLabel": "Net other-than-temporary impairment losses on securities recognized in net income",
        "negatedTotalLabel": "Net other-than-temporary impairment losses on securities recognized in net income"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r50",
      "r206"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_ImpairmentOfInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of other than temporary impairment (OTTI) loss on investments in available-for-sale and held-to-maturity debt securities, recognized in other comprehensive loss.",
        "label": "Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest",
        "negatedTerseLabel": "Portion of losses recognized in other comprehensive income (loss)"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForLossesAndLossAdjustmentExpense": {
     "auth_ref": [
      "r103",
      "r749"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid",
        "totalLabel": "Total claims and claim expense payments"
       }
      }
     },
     "localname": "PaymentsForLossesAndLossAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForOtherOperatingActivities": {
     "auth_ref": [
      "r103"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for operating activities classified as other.",
        "label": "Payments for Other Operating Activities",
        "negatedTerseLabel": "Other"
       }
      }
     },
     "localname": "PaymentsForOtherOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": {
     "auth_ref": [
      "r88",
      "r91",
      "r125"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.",
        "label": "Payments for (Proceeds from) Other Investing Activities",
        "negatedLabel": "Change in short-term and other investments, net"
       }
      }
     },
     "localname": "PaymentsForProceedsFromOtherInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForRepurchaseOfCommonStock": {
     "auth_ref": [
      "r95"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow to reacquire common stock during the period.",
        "label": "Payments for Repurchase of Common Stock",
        "negatedLabel": "Acquisition of treasury stock"
       }
      }
     },
     "localname": "PaymentsForRepurchaseOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForRepurchaseOfEquity": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow to reacquire common and preferred stock.",
        "label": "Payments for Repurchase of Equity",
        "negatedLabel": "Acquisition of treasury stock"
       }
      }
     },
     "localname": "PaymentsForRepurchaseOfEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDistributionsToAffiliates": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.",
        "label": "Payments of Distributions to Affiliates",
        "negatedTerseLabel": "Capital contributions to subsidiaries"
       }
      }
     },
     "localname": "PaymentsOfDistributionsToAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDividendsCommonStock": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.",
        "label": "Payments of Ordinary Dividends, Common Stock",
        "negatedLabel": "Dividends paid to shareholders"
       }
      }
     },
     "localname": "PaymentsOfDividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.",
        "label": "Payment, Tax Withholding, Share-based Payment Arrangement",
        "negatedLabel": "Withholding tax payments on RSUs tendered"
       }
      }
     },
     "localname": "PaymentsRelatedToTaxWithholdingForShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": {
     "auth_ref": [
      "r85",
      "r89",
      "r208"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Payments to Acquire Debt Securities, Available-for-sale",
        "negatedLabel": "Purchases"
       }
      }
     },
     "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired": {
     "auth_ref": [
      "r90"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.",
        "label": "Payments to Acquire Businesses, Net of Cash Acquired",
        "negatedLabel": "Acquisition of businesses",
        "negatedTerseLabel": "Acquisition of businesses, net of cash acquired"
       }
      }
     },
     "localname": "PaymentsToAcquireBusinessesNetOfCashAcquired",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireLimitedPartnershipInterests": {
     "auth_ref": [
      "r90"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes.",
        "label": "Payments to Acquire Limited Partnership Interests",
        "negatedTerseLabel": "Purchases"
       }
      }
     },
     "localname": "PaymentsToAcquireLimitedPartnershipInterests",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireMarketableSecurities": {
     "auth_ref": [
      "r208"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      },
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for purchase of marketable security.",
        "label": "Payments to Acquire Marketable Securities",
        "negatedLabel": "Purchases",
        "negatedTerseLabel": "Purchase of equity securities"
       }
      }
     },
     "localname": "PaymentsToAcquireMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": {
     "auth_ref": [
      "r338",
      "r340",
      "r346",
      "r364",
      "r366",
      "r367",
      "r368",
      "r369",
      "r370",
      "r388",
      "r390",
      "r391",
      "r393",
      "r413"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for retirement benefits.",
        "label": "Retirement Benefits [Text Block]",
        "verboseLabel": "Retirement Plans and Other Postretirement Benefits"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefits"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PensionExpense": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.",
        "label": "Pension Cost (Reversal of Cost)",
        "terseLabel": "Pension cost (credit)"
       }
      }
     },
     "localname": "PensionExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionPlansDefinedBenefitMember": {
     "auth_ref": [
      "r311",
      "r313",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r393",
      "r394",
      "r408",
      "r409",
      "r410",
      "r411"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.",
        "label": "Pension Plan [Member]",
        "terseLabel": "Defined Benefit Plan",
        "verboseLabel": "Pension Plan"
       }
      }
     },
     "localname": "PensionPlansDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PlanAssetCategoriesDomain": {
     "auth_ref": [
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r365",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Defined benefit plan asset investment.",
        "label": "Defined Benefit Plan, Plan Assets, Category [Domain]",
        "terseLabel": "Defined Benefit Plan, Plan Assets, Category [Domain]"
       }
      }
     },
     "localname": "PlanAssetCategoriesDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PlanNameAxis": {
     "auth_ref": [
      "r418",
      "r447"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by plan name for share-based payment arrangement.",
        "label": "Plan Name [Axis]",
        "terseLabel": "Plan Name [Axis]"
       }
      }
     },
     "localname": "PlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PlanNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan name for share-based payment arrangement.",
        "label": "Plan Name [Domain]",
        "terseLabel": "Plan Name [Domain]"
       }
      }
     },
     "localname": "PlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PolicyLoansMember": {
     "auth_ref": [
      "r809"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Loan issued by an insurance company, collateralized by the cash value of the borrower's life insurance policy.",
        "label": "Policy Loans [Member]",
        "terseLabel": "Policy loans"
       }
      }
     },
     "localname": "PolicyLoansMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PolicyholderAccountsPolicy": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for contracts reported in separate accounts, including the extent and terms of minimum guarantees, basis of presentation for separate account assets and liabilities and related separate account activity, the liability valuation method and assumptions used in valuing each type of policyholder and contract holder account maintained by the entity.",
        "label": "Policyholder Accounts, Policy [Policy Text Block]",
        "verboseLabel": "Separate Account (Variable Annuity) Assets and Liabilities"
       }
      }
     },
     "localname": "PolicyholderAccountsPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PolicyholderBenefitsAndClaimsIncurredGross": {
     "auth_ref": [
      "r715"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before effect of policies assumed or ceded, of expense related to provision for policy benefits and costs incurred.",
        "label": "Policyholder Benefits and Claims Incurred, Direct",
        "verboseLabel": "Benefits, claims and settlement expenses, Gross Amount"
       }
      }
     },
     "localname": "PolicyholderBenefitsAndClaimsIncurredGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet": {
     "auth_ref": [
      "r670",
      "r715"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      },
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.",
        "label": "Policyholder Benefits and Claims Incurred, Net",
        "totalLabel": "Benefits, claims and settlement expenses",
        "verboseLabel": "Benefits, claims and settlement expenses"
       }
      }
     },
     "localname": "PolicyholderBenefitsAndClaimsIncurredNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PortionAtFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r561"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured at fair value for financial reporting purposes.",
        "label": "Portion at Fair Value Measurement [Member]",
        "terseLabel": "Portion at Fair Value Measurement"
       }
      }
     },
     "localname": "PortionAtFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r15"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.",
        "label": "Preferred Stock, Par or Stated Value Per Share",
        "verboseLabel": "Preferred stock, par value (in usd per share)"
       }
      }
     },
     "localname": "PreferredStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r15"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.",
        "label": "Preferred Stock, Shares Authorized",
        "terseLabel": "Preferred stock, shares authorized (in shares)",
        "verboseLabel": "Preferred stock, shares authorized (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesIssued": {
     "auth_ref": [
      "r15"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.",
        "label": "Preferred Stock, Shares Issued",
        "verboseLabel": "Preferred stock, shares issued (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockValue": {
     "auth_ref": [
      "r15"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 7.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Preferred Stock, Value, Issued",
        "terseLabel": "Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued",
        "verboseLabel": "Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued"
       }
      }
     },
     "localname": "PreferredStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PremiumsEarnedNet": {
     "auth_ref": [
      "r651",
      "r700",
      "r732",
      "r801"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned.",
        "label": "Premiums Earned, Net",
        "verboseLabel": "Net Amount"
       }
      }
     },
     "localname": "PremiumsEarnedNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PremiumsPercentageAssumedToNet": {
     "auth_ref": [
      "r733"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of assumed premium earned to premium earned after effects of reinsurance, as disclosed in supplementary reinsurance information.",
        "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net",
        "verboseLabel": "Percentage of Amount Assumed to Net"
       }
      }
     },
     "localname": "PremiumsPercentageAssumedToNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ProceedsFromAnnuitiesAndInvestmentCertificates": {
     "auth_ref": [
      "r93"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from an insurance contract under which the policy holder make a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date.",
        "label": "Proceeds from Annuities and Investment Certificates",
        "verboseLabel": "Deposits"
       }
      }
     },
     "localname": "ProceedsFromAnnuitiesAndInvestmentCertificates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromBankDebt": {
     "auth_ref": [
      "r93"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from bank borrowing during the year.",
        "label": "Proceeds from Bank Debt",
        "terseLabel": "FHLB borrowings"
       }
      }
     },
     "localname": "ProceedsFromBankDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromFederalHomeLoanBankAdvances": {
     "auth_ref": [
      "r86"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from collection of advance by Federal Home Loan Bank (FHLBank), classified as investing activity.",
        "label": "Proceeds from FHLBank Advance, Investing Activities",
        "terseLabel": "Principal borrowings on Bank Credit Facility"
       }
      }
     },
     "localname": "ProceedsFromFederalHomeLoanBankAdvances",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromInsurancePremiumsCollected": {
     "auth_ref": [
      "r100"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash received as payments for insurance premiums during the current period.",
        "label": "Proceeds from Insurance Premiums Collected",
        "verboseLabel": "Net income"
       }
      }
     },
     "localname": "ProceedsFromInsurancePremiumsCollected",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLimitedPartnershipInvestments": {
     "auth_ref": [
      "r87"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes.",
        "label": "Proceeds from Limited Partnership Investments",
        "terseLabel": "Sales"
       }
      }
     },
     "localname": "ProceedsFromLimitedPartnershipInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLinesOfCredit": {
     "auth_ref": [
      "r93",
      "r123"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.",
        "label": "Proceeds from Lines of Credit",
        "terseLabel": "Principal borrowings on Bank Credit Facility"
       }
      }
     },
     "localname": "ProceedsFromLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r85",
      "r86",
      "r208"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale",
        "verboseLabel": "Maturities, paydowns, calls and redemptions"
       }
      }
     },
     "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromRepaymentsOfBankOverdrafts": {
     "auth_ref": [
      "r93",
      "r96",
      "r109"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer.",
        "label": "Proceeds from (Repayments of) Bank Overdrafts",
        "verboseLabel": "Change in book overdrafts"
       }
      }
     },
     "localname": "ProceedsFromRepaymentsOfBankOverdrafts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r85",
      "r86",
      "r208"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds from Sale and Maturity of Debt Securities, Available-for-sale",
        "terseLabel": "Proceeds received"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities  (held-to-maturity or available-for-sale) during the period.",
        "label": "Proceeds from Sale and Maturity of Marketable Securities",
        "terseLabel": "Sales and repayments"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt": {
     "auth_ref": [
      "r85",
      "r86",
      "r208"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds from Sale of Debt Securities, Available-for-sale",
        "verboseLabel": "Sales"
       }
      }
     },
     "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromStockOptionsExercised": {
     "auth_ref": [
      "r92",
      "r448"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow from exercise of option under share-based payment arrangement.",
        "label": "Proceeds from Stock Options Exercised",
        "verboseLabel": "Proceeds from exercise of stock options"
       }
      }
     },
     "localname": "ProceedsFromStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember": {
     "auth_ref": [
      "r728",
      "r735",
      "r772"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contract providing insurance coverage against property-related loss. Includes, but is not limited to, damage, theft, or legal liability for personal injury.",
        "label": "Property, Liability and Casualty Insurance Product Line [Member]",
        "terseLabel": "Property and Casualty segment"
       }
      }
     },
     "localname": "PropertyLiabilityAndCasualtyInsuranceSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesNarrativeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r26",
      "r284"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.",
        "label": "Long-Lived Tangible Asset [Axis]",
        "terseLabel": "Property, Plant and Equipment, Type [Axis]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentGross": {
     "auth_ref": [
      "r25",
      "r282"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property, Plant and Equipment, Gross",
        "verboseLabel": "Property and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r6",
      "r7",
      "r284",
      "r693"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property, Plant and Equipment, Net",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Property, Plant and Equipment, Net, by Type [Abstract]",
        "verboseLabel": "Property and Equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNetByTypeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPropertyandEquipmentIncludedinOtherAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": {
     "auth_ref": [
      "r24",
      "r117",
      "r284",
      "r848",
      "r849"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.",
        "label": "Property, Plant and Equipment, Policy [Policy Text Block]",
        "verboseLabel": "Property and Equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTextBlock": {
     "auth_ref": [
      "r6",
      "r284"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table Text Block]",
        "verboseLabel": "Property and equipment"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r6",
      "r282"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "label": "Long-Lived Tangible Asset [Domain]",
        "terseLabel": "Property, Plant and Equipment, Type [Domain]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.",
        "label": "Property, Plant and Equipment, Useful Life",
        "terseLabel": "Property, plant and equipment, useful life"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_PublicUtilityBondsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents investments by the reporting entity in fixed maturity securities (bonds) issued by a public utility.",
        "label": "Public Utility, Bonds [Member]",
        "verboseLabel": "Public utilities"
       }
      }
     },
     "localname": "PublicUtilityBondsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PublicUtilityEquitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents investments by the reporting entity in equity securities issued by a public utility.",
        "label": "Public Utility, Equities [Member]",
        "terseLabel": "Public utilities"
       }
      }
     },
     "localname": "PublicUtilityEquitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted": {
     "auth_ref": [
      "r12",
      "r643",
      "r686"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.",
        "label": "Purchase Commitment, Remaining Minimum Amount Committed",
        "terseLabel": "Remaining minimum amount committed"
       }
      }
     },
     "localname": "PurchaseCommitmentRemainingMinimumAmountCommitted",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ContingenciesandCommitmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_QualifiedPlanMember": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan with tax-exempt status designed and operated in accordance with applicable tax provision of designated taxing authority. Taxing authority includes, but is not limited to, U.S. Internal Revenue Service (IRS). Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Qualified Plan [Member]",
        "terseLabel": "Qualified Plan"
       }
      }
     },
     "localname": "QualifiedPlanMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_QuarterlyFinancialInformationDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Quarterly Financial Information Disclosure [Abstract]",
        "terseLabel": "Quarterly Financial Information Disclosure [Abstract]"
       }
      }
     },
     "localname": "QuarterlyFinancialInformationDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_QuarterlyFinancialInformationTextBlock": {
     "auth_ref": [
      "r156"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information.",
        "label": "Quarterly Financial Information [Text Block]",
        "verboseLabel": "Unaudited Selected Quarterly Financial Data"
       }
      }
     },
     "localname": "QuarterlyFinancialInformationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialData"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RealizedGainLossOnInvestmentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of realized gains and losses on investments reported in the statement of income.",
        "label": "Realized Gain (Loss) on Investments [Table Text Block]",
        "verboseLabel": "Summary of realized investment gains (losses)"
       }
      }
     },
     "localname": "RealizedGainLossOnInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RealizedInvestmentGainsLosses": {
     "auth_ref": [
      "r713"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of realized gain (loss) on investment.",
        "label": "Realized Investment Gains (Losses)",
        "terseLabel": "Net investment gains (losses)",
        "totalLabel": "Total",
        "verboseLabel": "Net investment gains (losses)"
       }
      }
     },
     "localname": "RealizedInvestmentGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentGainsLossesByTransactionTypeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealizedInvestmentGainsLossesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Realized Investment Gains (Losses) [Abstract]",
        "verboseLabel": "Net investment gains (losses)"
       }
      }
     },
     "localname": "RealizedInvestmentGainsLossesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent": {
     "auth_ref": [
      "r60",
      "r71"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.",
        "label": "Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent",
        "negatedTerseLabel": "Amounts reclassified from AOCI"
       }
      }
     },
     "localname": "ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTextBlock": {
     "auth_ref": [
      "r189",
      "r191"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of each significant reconciling item, other than profit (loss), revenues, or assets, in the reconciliation of totals of such items in reportable segments to the entity's corresponding consolidated amount.",
        "label": "Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]",
        "verboseLabel": "Additional significant financial information for these segments"
       }
      }
     },
     "localname": "ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]",
        "terseLabel": "Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]"
       }
      }
     },
     "localname": "ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RedeemablePreferredStockMember": {
     "auth_ref": [
      "r3",
      "r118",
      "r236",
      "r299",
      "r568"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Description of type or class of redeemable preferred stock. For instance, cumulative preferred stock, noncumulative preferred stock, convertible or series.",
        "label": "Redeemable Preferred Stock [Member]",
        "terseLabel": "Redeemable preferred stocks"
       }
      }
     },
     "localname": "RedeemablePreferredStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReinsuranceAccountingPolicy": {
     "auth_ref": [
      "r117",
      "r670",
      "r671",
      "r803",
      "r804"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of reinsurance accounting policy, for example, but not limited to, description of the methodologies and assumptions underlying determination of reinsurance recoverables, reinsurance payables and retention policy.",
        "label": "Reinsurance Accounting Policy [Policy Text Block]",
        "terseLabel": "Reinsurance"
       }
      }
     },
     "localname": "ReinsuranceAccountingPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ReinsuranceDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Reinsurance Disclosures [Abstract]",
        "terseLabel": "Reinsurance Disclosures [Abstract]",
        "verboseLabel": "Effects of reinsurance on premiums and benefits"
       }
      }
     },
     "localname": "ReinsuranceDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed": {
     "auth_ref": [
      "r670"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of policy benefits and costs incurred for policies assumed.",
        "label": "Policyholder Benefits and Claims Incurred, Assumed",
        "verboseLabel": "Benefits, claims and settlement expenses, Assumed from Other Companies"
       }
      }
     },
     "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded": {
     "auth_ref": [
      "r670"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of reduction of provision for policy benefits and costs incurred for policies ceded.",
        "label": "Policyholder Benefits and Claims Incurred, Ceded",
        "terseLabel": "Benefits, claims and settlement expenses, Ceded to Other Companies"
       }
      }
     },
     "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesEffectsofReinsuranceDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Premiums Earned, Net [Abstract]",
        "verboseLabel": "Premiums"
       }
      }
     },
     "localname": "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIVReinsuranceDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments": {
     "auth_ref": [
      "r672",
      "r744",
      "r747",
      "r750"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer.",
        "label": "Reinsurance Recoverable for Unpaid Claims and Claims Adjustments",
        "verboseLabel": "Reinsurance recoverables, including reinsurance premium paid"
       }
      }
     },
     "localname": "ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceRecoverables": {
     "auth_ref": [
      "r672",
      "r691",
      "r743"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.",
        "label": "Reinsurance Recoverables, Including Reinsurance Premium Paid",
        "periodEndLabel": "Plus: reinsurance recoverables",
        "periodStartLabel": "Less: reinsurance recoverables",
        "terseLabel": "Reinsurance recoverables"
       }
      }
     },
     "localname": "ReinsuranceRecoverables",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceRecoverablesGross": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before valuation allowance recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.",
        "label": "Reinsurance Recoverables, Gross",
        "terseLabel": "Reinsurance block of in-force fixed and variable annuity business",
        "verboseLabel": "Reinsurance block of in-force fixed and variable annuity business"
       }
      }
     },
     "localname": "ReinsuranceRecoverablesGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails",
      "http://www.horacemann.com/role/InvestmentsSalesofFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceRecoverablesOnPaidLosses": {
     "auth_ref": [
      "r672",
      "r744"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to and paid by the ceding insurer.",
        "label": "Reinsurance Recoverable for Paid Claims and Claims Adjustments",
        "terseLabel": "Deposit asset on reinsurance"
       }
      }
     },
     "localname": "ReinsuranceRecoverablesOnPaidLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceRecoverablesOnPaidLossesGross": {
     "auth_ref": [
      "r672",
      "r744"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before valuation allowance of reinsurance recoverables on paid losses.",
        "label": "Reinsurance Recoverables on Paid Losses, Gross",
        "terseLabel": "Fixed annuity reserves reinsured on a coinsurance basis"
       }
      }
     },
     "localname": "ReinsuranceRecoverablesOnPaidLossesGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceTextBlock": {
     "auth_ref": [
      "r817"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure pertaining to the existence, magnitude and information about insurance that has been ceded to or assumed from another insurance company, including the methodologies and assumptions used in determining recorded amounts.",
        "label": "Reinsurance [Text Block]",
        "terseLabel": "Reinsurance and Catastrophes"
       }
      }
     },
     "localname": "ReinsuranceTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ReinsuranceandCatastrophes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings": {
     "auth_ref": [
      "r96"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for repayment of Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity.",
        "label": "Payments of FHLBank Borrowings, Financing Activities",
        "negatedTerseLabel": "Principal repayment on FHLB funding agreements"
       }
      }
     },
     "localname": "RepaymentsOfFederalHomeLoanBankBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResidentialMortgageBackedSecuritiesMember": {
     "auth_ref": [
      "r210",
      "r339"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Securities collateralized by residential real estate mortgage loans.",
        "label": "Residential Mortgage Backed Securities [Member]",
        "terseLabel": "Residential mortgage-backed securities (non-agency)"
       }
      }
     },
     "localname": "ResidentialMortgageBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RestrictedCash": {
     "auth_ref": [
      "r115",
      "r636",
      "r687"
     ],
     "calculation": {
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.",
        "label": "Restricted Cash",
        "terseLabel": "Restricted cash"
       }
      }
     },
     "localname": "RestrictedCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationSummaryofCashandRestrictedCashDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedStockUnitsRSUMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.",
        "label": "Restricted Stock Units (RSUs) [Member]",
        "terseLabel": "Restricted stock units"
       }
      }
     },
     "localname": "RestrictedStockUnitsRSUMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r18",
      "r305",
      "r456",
      "r688",
      "r779",
      "r784"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings (Accumulated Deficit)",
        "terseLabel": "Retained earnings",
        "verboseLabel": "Retained earnings"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r133",
      "r141",
      "r143",
      "r240",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489",
      "r775",
      "r777"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Retained earnings",
        "verboseLabel": "Retained earnings"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanNameAxis": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r412"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Axis]",
        "terseLabel": "Retirement Plan Name [Axis]"
       }
      }
     },
     "localname": "RetirementPlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanNameDomain": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r399",
      "r400",
      "r401",
      "r402",
      "r403",
      "r404",
      "r405",
      "r406",
      "r407",
      "r412"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.",
        "label": "Retirement Plan Name [Domain]",
        "terseLabel": "Retirement Plan Name [Domain]"
       }
      }
     },
     "localname": "RetirementPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanTaxStatusAxis": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Retirement Plan Tax Status [Axis]",
        "terseLabel": "Retirement Plan Tax Status [Axis]"
       }
      }
     },
     "localname": "RetirementPlanTaxStatusAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanTaxStatusDomain": {
     "auth_ref": [
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r374",
      "r375",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tax status of plan designed to provide retirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Retirement Plan Tax Status [Domain]",
        "terseLabel": "Retirement Plan Tax Status [Domain]"
       }
      }
     },
     "localname": "RetirementPlanTaxStatusDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanTypeAxis": {
     "auth_ref": [
      "r311",
      "r312",
      "r313",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r393",
      "r394",
      "r395",
      "r396",
      "r397",
      "r398",
      "r408",
      "r409",
      "r410",
      "r411"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Axis]",
        "terseLabel": "Retirement Plan Type [Axis]"
       }
      }
     },
     "localname": "RetirementPlanTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanTypeDomain": {
     "auth_ref": [
      "r311",
      "r312",
      "r313",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r338",
      "r339",
      "r341",
      "r342",
      "r343",
      "r344",
      "r345",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r362",
      "r363",
      "r365",
      "r368",
      "r373",
      "r378",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r393",
      "r394",
      "r395",
      "r396",
      "r397",
      "r398",
      "r408",
      "r409",
      "r410",
      "r411"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Domain]",
        "terseLabel": "Retirement Plan Type [Domain]"
       }
      }
     },
     "localname": "RetirementPlanTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Revenues": {
     "auth_ref": [
      "r73",
      "r118",
      "r172",
      "r173",
      "r186",
      "r192",
      "r193",
      "r200",
      "r201",
      "r203",
      "r236",
      "r568",
      "r660"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).",
        "label": "Revenues",
        "terseLabel": "Total revenues",
        "totalLabel": "Total revenues"
       }
      }
     },
     "localname": "Revenues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Revenues [Abstract]",
        "verboseLabel": "Revenues"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SalesMember": {
     "auth_ref": [
      "r534"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Primary financial statement caption encompassing revenue from sale of goods and services rendered in the normal course of business.",
        "label": "Sales [Member]",
        "terseLabel": "Sales"
       }
      }
     },
     "localname": "SalesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesFairValueofDerivativesIncludedinConsolidatedStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [
      "r60",
      "r575",
      "r576"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).",
        "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]",
        "terseLabel": "Accumulated other comprehensive income (loss)"
       }
      }
     },
     "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock": {
     "auth_ref": [
      "r337"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans.  This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.",
        "label": "Schedule of Allocation of Plan Assets [Table Text Block]",
        "verboseLabel": "Fair value hierarchy for the Company's defined benefit pension plan assets"
       }
      }
     },
     "localname": "ScheduleOfAllocationOfPlanAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Debt Securities, Available-for-sale [Line Items]",
        "terseLabel": "Debt Securities, Available-for-sale [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsOffsettingofAssetsandLiabilitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.",
        "label": "Schedule of Available-for-sale Securities Reconciliation [Table Text Block]",
        "verboseLabel": "Unrealized gains and losses on fixed maturities and equity securities"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of supplemental cash flow information for the periods presented.",
        "label": "Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]",
        "terseLabel": "Schedule of supplemental cash flow information related to operating leases",
        "verboseLabel": "Reconciliation of net income to net cash provided by operating activities"
       }
      }
     },
     "localname": "ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesTables",
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable": {
     "auth_ref": [
      "r509"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.",
        "label": "Collaborative Arrangement and Arrangement Other than Collaborative [Table]",
        "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative [Table]"
       }
      }
     },
     "localname": "ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesScheduleofMaturityDatesForFHLBFundingAgreementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": {
     "auth_ref": [
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.",
        "label": "Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]",
        "verboseLabel": "Income taxes expenses"
       }
      }
     },
     "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [
      "r47"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions  designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans.",
        "label": "Comprehensive Income (Loss) [Table Text Block]",
        "verboseLabel": "Components of comprehensive income"
       }
      }
     },
     "localname": "ScheduleOfComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock": {
     "auth_ref": [
      "r372"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost.",
        "label": "Schedule of Costs of Retirement Plans [Table Text Block]",
        "verboseLabel": "Summary of minimum funding requirement and the expected full year contributions for the Company's plans"
       }
      }
     },
     "localname": "ScheduleOfCostsOfRetirementPlansTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDebtTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.",
        "label": "Schedule of Debt [Table Text Block]",
        "verboseLabel": "Summary of indebtedness outstanding"
       }
      }
     },
     "localname": "ScheduleOfDebtTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": {
     "auth_ref": [
      "r479"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.",
        "label": "Schedule of Deferred Tax Assets and Liabilities [Table Text Block]",
        "verboseLabel": "Summary of deferred tax assets and liabilities"
       }
      }
     },
     "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable": {
     "auth_ref": [
      "r372",
      "r373",
      "r376",
      "r377",
      "r388"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosures about an individual defined benefit pension plan or an other postretirement defined benefit plan. It may be appropriate to group certain similar plans.  Also includes schedule for fair value of plan assets by major categories of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Schedule of Defined Benefit Plans Disclosures [Table]",
        "terseLabel": "Schedule of Defined Benefit Plans Disclosures [Table]"
       }
      }
     },
     "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsandPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsFairValueofPlanAssetsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock": {
     "auth_ref": [
      "r527",
      "r533",
      "r536"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.",
        "label": "Derivative Instruments, Gain (Loss) [Table Text Block]",
        "verboseLabel": "Derivative instruments, gain (loss)"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock": {
     "auth_ref": [
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.",
        "label": "Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]",
        "verboseLabel": "Schedule of derivative instruments in statement of financial position, fair value"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsTextBlock": {
     "auth_ref": [
      "r520",
      "r522",
      "r523",
      "r524",
      "r525",
      "r532",
      "r533",
      "r537",
      "r539"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.",
        "label": "Schedule of Derivative Instruments [Table Text Block]",
        "verboseLabel": "Financing receivable credit quality indicators"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": {
     "auth_ref": [
      "r150"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.",
        "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]",
        "verboseLabel": "Computations of net income per share on both basic and diluted bases, including reconciliations of the numerators and denominators"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": {
     "auth_ref": [
      "r467"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.",
        "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]",
        "verboseLabel": "Income taxes expenses reconciliation"
       }
      }
     },
     "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock": {
     "auth_ref": [
      "r348"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.",
        "label": "Schedule of Expected Benefit Payments [Table Text Block]",
        "verboseLabel": "Estimated future benefit payments"
       }
      }
     },
     "localname": "ScheduleOfExpectedBenefitPaymentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": {
     "auth_ref": [
      "r545",
      "r546"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]",
        "verboseLabel": "Summary of company's fair value hierarchy measured at recurring basis"
       }
      }
     },
     "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentFairValue": {
     "auth_ref": [
      "r673",
      "r809"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value amount of the specified investment category of assets maintained in separate accounts as of the balance sheet date.",
        "label": "Schedule of Fair Value of Separate Accounts by Major Category of Investment, Fair Value",
        "terseLabel": "Separate account (variable annuity) assets"
       }
      }
     },
     "localname": "ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable": {
     "auth_ref": [
      "r269",
      "r273",
      "r632"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "label": "Schedule of Finite-Lived Intangible Assets [Table]",
        "terseLabel": "Schedule of Finite-Lived Intangible Assets [Table]"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofFiniteLivedIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock": {
     "auth_ref": [
      "r269",
      "r273"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.",
        "label": "Schedule of Finite-Lived Intangible Assets [Table Text Block]",
        "terseLabel": "Summary of finite-lived intangible assets"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Gain (Loss) on Securities [Line Items]",
        "terseLabel": "Gain (Loss) on Securities [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfGainLossOnInvestmentsTable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about realized and unrealized gain (loss) on investment in security.",
        "label": "Schedule of Gain (Loss) on Securities [Table]",
        "terseLabel": "Schedule of Gain (Loss) on Securities [Table]"
       }
      }
     },
     "localname": "ScheduleOfGainLossOnInvestmentsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsRealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfGoodwillTable": {
     "auth_ref": [
      "r264",
      "r266"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of goodwill and the changes during the year due to acquisition, sale, impairment or for other reasons.",
        "label": "Schedule of Goodwill [Table]",
        "terseLabel": "Schedule of Goodwill [Table]"
       }
      }
     },
     "localname": "ScheduleOfGoodwillTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfGoodwillTextBlock": {
     "auth_ref": [
      "r264",
      "r266"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.",
        "label": "Schedule of Goodwill [Table Text Block]",
        "terseLabel": "Schedule of goodwill"
       }
      }
     },
     "localname": "ScheduleOfGoodwillTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable": {
     "auth_ref": [
      "r277",
      "r280"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity.",
        "label": "Schedule of Indefinite-Lived Intangible Assets [Table]",
        "terseLabel": "Schedule of Indefinite-Lived Intangible Assets [Table]"
       }
      }
     },
     "localname": "ScheduleOfIndefiniteLivedIntangibleAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock": {
     "auth_ref": [
      "r277",
      "r280"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment.",
        "label": "Schedule of Indefinite-Lived Intangible Assets [Table Text Block]",
        "terseLabel": "Summary of indefinite-lived intangible assets"
       }
      }
     },
     "localname": "ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Net Investment Income [Line Items]",
        "terseLabel": "Net Investment Income [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable": {
     "auth_ref": [
      "r81",
      "r82",
      "r712"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about investment income, including, but not limited to, interest and dividend income and amortization of discount (premium) derived from debt and equity securities. Excludes realized and unrealized gain (loss) on investments.",
        "label": "Investment Income [Table]",
        "terseLabel": "Investment Income [Table]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r751"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims.",
        "label": "Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]",
        "verboseLabel": "Reconciliation of property and casualty unpaid claims and claim expenses"
       }
      }
     },
     "localname": "ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNetBenefitCostsTableTextBlock": {
     "auth_ref": [
      "r350"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.",
        "label": "Schedule of Net Benefit Costs [Table Text Block]",
        "verboseLabel": "Defined benefit plan and the supplemental defined benefit plans"
       }
      }
     },
     "localname": "ScheduleOfNetBenefitCostsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNetFundedStatusTableTextBlock": {
     "auth_ref": [
      "r336"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of net funded status of pension plans and/or other employee benefit plans.",
        "label": "Schedule of Net Funded Status [Table Text Block]",
        "verboseLabel": "Funded status of the defined benefit, supplemental retirement pension plans and postretirement benefits other than pensions"
       }
      }
     },
     "localname": "ScheduleOfNetFundedStatusTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock": {
     "auth_ref": [
      "r155"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.",
        "label": "Quarterly Financial Information [Table Text Block]",
        "verboseLabel": "Selected quarterly financial data"
       }
      }
     },
     "localname": "ScheduleOfQuarterlyFinancialInformationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRealizedGainLossTableTextBlock": {
     "auth_ref": [
      "r230"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.",
        "label": "Schedule of Realized Gain (Loss) [Table Text Block]",
        "verboseLabel": "Proceeds received from sales of fixed maturities and equity securities"
       }
      }
     },
     "localname": "ScheduleOfRealizedGainLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": {
     "auth_ref": [
      "r181",
      "r184",
      "r190",
      "r264"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table]",
        "terseLabel": "Schedule of Segment Reporting Information, by Segment [Table]"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": {
     "auth_ref": [
      "r181",
      "r184",
      "r190",
      "r264"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]",
        "verboseLabel": "Summarized financial information for these segments"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": {
     "auth_ref": [
      "r418",
      "r447"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about share-based payment arrangement.",
        "label": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]",
        "terseLabel": "Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock": {
     "auth_ref": [
      "r423"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.",
        "label": "Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]",
        "verboseLabel": "Summary of changes in outstanding restricted common stock units"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": {
     "auth_ref": [
      "r423",
      "r433",
      "r435"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.",
        "label": "Share-based Payment Arrangement, Option, Activity [Table Text Block]",
        "verboseLabel": "Summary of changes in outstanding options"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock": {
     "auth_ref": [
      "r439"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.",
        "label": "Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]",
        "verboseLabel": "Stock options fair value pricing model weighted-average assumptions"
       }
      }
     },
     "localname": "ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock": {
     "auth_ref": [
      "r474",
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the change in unrecognized tax benefits.",
        "label": "Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]",
        "verboseLabel": "Unrecognized tax benefits, excluding interest and penalties"
       }
      }
     },
     "localname": "ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock": {
     "auth_ref": [
      "r273"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.",
        "label": "Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]",
        "terseLabel": "Future amortization expense"
       }
      }
     },
     "localname": "ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [
      "r168",
      "r172",
      "r173",
      "r174",
      "r175",
      "r176",
      "r177",
      "r178",
      "r179",
      "r180",
      "r181",
      "r182",
      "r183",
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r197",
      "r203",
      "r759"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Segments [Domain]",
        "terseLabel": "Segments [Domain]"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Segment Reporting [Abstract]",
        "terseLabel": "Segment Reporting [Abstract]"
       }
      }
     },
     "localname": "SegmentReportingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r168",
      "r170",
      "r171",
      "r181",
      "r185",
      "r191",
      "r195",
      "r196",
      "r197",
      "r198",
      "r200",
      "r202",
      "r203",
      "r204"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.",
        "label": "Segment Reporting Disclosure [Text Block]",
        "verboseLabel": "Segment Information"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Segment Reporting Information [Line Items]",
        "terseLabel": "Segment Reporting Information [Line Items]"
       }
      }
     },
     "localname": "SegmentReportingInformationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesAdjustmentstoAmortizationExpenseDetails",
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesNarrativeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingInformationProfitLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Segment Reporting Information, Profit (Loss) [Abstract]",
        "verboseLabel": "Summarized financial information for these segments"
       }
      }
     },
     "localname": "SegmentReportingInformationProfitLossAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SeniorNotesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Bond that takes priority over other debt securities sold by the issuer. In the event the issuer goes bankrupt, senior debt holders receive priority for (must receive) repayment prior to (relative to) junior and unsecured (general) creditors.",
        "label": "Senior Notes [Member]",
        "terseLabel": "4.50% Senior Notes"
       }
      }
     },
     "localname": "SeniorNotesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails",
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SeparateAccountAssets": {
     "auth_ref": [
      "r680",
      "r805",
      "r809",
      "r813"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 8.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of asset at fair value held for benefit of separate account policyholder.",
        "label": "Separate Account Asset",
        "terseLabel": "Separate account asset",
        "verboseLabel": "Separate Account (variable annuity) assets"
       }
      }
     },
     "localname": "SeparateAccountAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SeparateAccountsLiability": {
     "auth_ref": [
      "r685",
      "r805",
      "r811",
      "r812",
      "r814"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account.",
        "label": "Separate Account, Liability",
        "terseLabel": "Separate account liability",
        "verboseLabel": "Separate Account (variable annuity) liabilities"
       }
      }
     },
     "localname": "SeparateAccountsLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r105"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense for share-based payment arrangement.",
        "label": "Share-based Payment Arrangement, Noncash Expense",
        "terseLabel": "Share-based compensation expense"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": {
     "auth_ref": [
      "r419"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period",
        "terseLabel": "Vesting period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": {
     "auth_ref": [
      "r427"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period",
        "negatedLabel": "Forfeited, Total Outstanding Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r432"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value",
        "verboseLabel": "Forfeited, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": {
     "auth_ref": [
      "r430"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period",
        "verboseLabel": "Granted, Total Outstanding Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r430"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value",
        "terseLabel": "Granted, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": {
     "auth_ref": [
      "r429"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails": {
       "order": 2.0,
       "parentTag": "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number",
        "periodEndLabel": "Ending balance, Total Outstanding, Units (in shares)",
        "periodStartLabel": "Beginning balance, Total Outstanding, Units (in shares)",
        "verboseLabel": "RSUs related to incentive compensation (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]",
        "terseLabel": "Total\u00a0Outstanding\u00a0Units"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r429"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value",
        "periodEndLabel": "Ending balance, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)",
        "periodStartLabel": "Beginning balance, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]",
        "terseLabel": "Outstanding Units, Weighted Average Grant Date Fair Value per Unit"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": {
     "auth_ref": [
      "r431"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period",
        "verboseLabel": "Vested, Total Outstanding Units (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r431"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value",
        "verboseLabel": "Vested, Total Outstanding, Weighted Average Grant Date Fair Value per Unit (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationRestrictedStockActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]",
        "verboseLabel": "Weighted average assumptions:"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": {
     "auth_ref": [
      "r442"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate",
        "verboseLabel": "Expected dividend yield"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate": {
     "auth_ref": [
      "r441"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate",
        "verboseLabel": "Expected volatility (based on historical volatility)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate": {
     "auth_ref": [
      "r443"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The risk-free interest rate assumption that is used in valuing an option on its own shares.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate",
        "verboseLabel": "Risk-free interest rate"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]",
        "terseLabel": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of additional shares authorized for issuance under share-based payment arrangement.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized",
        "terseLabel": "Amended increase in shares reserved for issuance (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant": {
     "auth_ref": [
      "r447"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant",
        "terseLabel": "Shares available for grant (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod": {
     "auth_ref": [
      "r428"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period",
        "negatedTerseLabel": "Options Outstanding, Expired (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": {
     "auth_ref": [
      "r427"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period",
        "negatedLabel": "Options Outstanding, Forfeited (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue": {
     "auth_ref": [
      "r434"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The grant-date intrinsic value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value",
        "terseLabel": "Intrinsic value"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Gross number of share options (or share units) granted during the period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross",
        "terseLabel": "Options Outstanding, Granted (in shares)",
        "verboseLabel": "Number of stock options granted (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r434"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value",
        "verboseLabel": "Weighted average grant date fair value of stock options granted (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": {
     "auth_ref": [
      "r447"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value",
        "terseLabel": "Aggregate intrinsic value of options"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": {
     "auth_ref": [
      "r425",
      "r447"
     ],
     "calculation": {
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails": {
       "order": 1.0,
       "parentTag": "hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options outstanding, including both vested and non-vested options.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number",
        "periodEndLabel": "Options Outstanding, Ending Balance (in shares)",
        "periodStartLabel": "Options Outstanding, Beginning Balance (in shares)",
        "terseLabel": "Total Outstanding Options, Options (in shares)",
        "verboseLabel": "Stock options (in shares)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]",
        "terseLabel": "Outstanding"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r424"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price",
        "periodEndLabel": "Weighted Average Option Price per Share, Ending Balance (in usd per share)",
        "periodStartLabel": "Weighted Average Option Price per Share, Beginning Balance (in usd per share)",
        "verboseLabel": "Total Outstanding Options, Weighted Average Option Price per Share (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]",
        "terseLabel": "Weighted Average Option Price per Share"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue": {
     "auth_ref": [
      "r437"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value",
        "terseLabel": "Aggregate intrinsic value of vested options"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": {
     "auth_ref": [
      "r415",
      "r421"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Award under share-based payment arrangement.",
        "label": "Award Type [Domain]",
        "terseLabel": "Award Type [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationOutstandingStockUnitsandStockOptionsunderComprehensivePlanDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which option holders acquired shares when converting their stock options into shares.",
        "label": "Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price",
        "verboseLabel": "Weighted Average Option Price per Share, Options Exercised (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.",
        "label": "Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price",
        "verboseLabel": "Weighted Average Option Price per Share, Options Expired (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.",
        "label": "Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price",
        "verboseLabel": "Weighted Average Option Price per Share, Options Forfeited (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.",
        "label": "Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price",
        "verboseLabel": "Weighted Average Option Price per Share, Options Granted (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": {
     "auth_ref": [
      "r117",
      "r418",
      "r422"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.",
        "label": "Share-based Payment Arrangement [Policy Text Block]",
        "verboseLabel": "Share-Based Compensation"
       }
      }
     },
     "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis": {
     "auth_ref": [
      "r438"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by range of option prices pertaining to options granted.",
        "label": "Exercise Price Range [Axis]",
        "terseLabel": "Exercise Price Range [Axis]"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeBeginningOfPeriodAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share-based Payment Arrangement, Option, Exercise Price Range, Beginning of Period [Abstract]",
        "terseLabel": "Range of Option Prices per Share"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeBeginningOfPeriodAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain": {
     "auth_ref": [
      "r444"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Supplementary information on outstanding and exercisable share awards as of the balance sheet date which stratifies outstanding options by ranges of exercise prices.",
        "label": "Exercise Price Range [Domain]",
        "terseLabel": "Exercise Price Range [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit": {
     "auth_ref": [
      "r444"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.",
        "label": "Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit",
        "terseLabel": "Minimum exercise price (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit": {
     "auth_ref": [
      "r444"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.",
        "label": "Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit",
        "terseLabel": "Maximum exercise price (in usd per share)"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharePrice": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks of a company.",
        "label": "Share Price",
        "terseLabel": "Share price (in usd per share)"
       }
      }
     },
     "localname": "SharePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod": {
     "auth_ref": [
      "r420"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period",
        "terseLabel": "Expiration period"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1": {
     "auth_ref": [
      "r440",
      "r457"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term",
        "verboseLabel": "Expected life, in years"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesFairValueAssumptionsforStockOptionPricingDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2": {
     "auth_ref": [
      "r436"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term",
        "verboseLabel": "Total Outstanding Options, Weighted Average Remaining Term"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionInformationbyRangesofExercisePricesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of options vested.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares",
        "terseLabel": "Options Outstanding, Vested (in shares)"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1": {
     "auth_ref": [
      "r425"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.",
        "label": "Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price",
        "periodEndLabel": "Range of Option Prices per Share, Ending Balance (in usd per share)",
        "periodStartLabel": "Range of Option Prices per Share, Beginning Balance (in usd per share)"
       }
      }
     },
     "localname": "SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock": {
     "auth_ref": [
      "r308",
      "r461"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP).",
        "label": "Shareholders' Equity and Share-based Payments [Text Block]",
        "verboseLabel": "Shareholders' Equity and Share-Based Compensation"
       }
      }
     },
     "localname": "ShareholdersEquityAndShareBasedPaymentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShortDurationInsuranceContractAccidentYear2019Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2019 in which covered event occurs under terms of short-duration insurance contract.",
        "label": "Short-Duration Insurance Contract, Accident Year 2019 [Member]",
        "terseLabel": "2019"
       }
      }
     },
     "localname": "ShortDurationInsuranceContractAccidentYear2019Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortDurationInsuranceContractAccidentYear2020Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2020 in which covered event occurs under terms of short-duration insurance contract.",
        "label": "Short-Duration Insurance Contract, Accident Year 2020 [Member]",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "ShortDurationInsuranceContractAccidentYear2020Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2017 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2017 [Member]",
        "terseLabel": "2017"
       }
      }
     },
     "localname": "ShortDurationInsuranceContractsAccidentYear2017Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortDurationInsuranceContractsAccidentYear2018Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2018 in which covered event occurs under terms of short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2018 [Member]",
        "terseLabel": "2018"
       }
      }
     },
     "localname": "ShortDurationInsuranceContractsAccidentYear2018Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortTermBankLoansAndNotesPayable": {
     "auth_ref": [
      "r28",
      "r698"
     ],
     "calculation": {
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtAndCapitalLeaseObligations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of borrowings from a bank classified as other, maturing within one year or operating cycle, if longer.",
        "label": "Short-term Bank Loans and Notes Payable",
        "verboseLabel": "Bank Credit Facility"
       }
      }
     },
     "localname": "ShortTermBankLoansAndNotesPayable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortTermBorrowings": {
     "auth_ref": [
      "r9",
      "r640",
      "r683"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 6.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.",
        "label": "Short-term Debt",
        "terseLabel": "Short-term debt"
       }
      }
     },
     "localname": "ShortTermBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortTermBorrowingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Short-term Debt [Abstract]",
        "verboseLabel": "Short-term debt"
       }
      }
     },
     "localname": "ShortTermBorrowingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShortTermInvestmentsMember": {
     "auth_ref": [
      "r841",
      "r842",
      "r843",
      "r844"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Investments which are not otherwise included in another category or item that the entity has the intent to sell or dispose of within one year from the date of the balance sheet.",
        "label": "Short-term Investments [Member]",
        "terseLabel": "Short-term investments",
        "verboseLabel": "Short-term Investments"
       }
      }
     },
     "localname": "ShortTermInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortTermLeaseCost": {
     "auth_ref": [
      "r590",
      "r596"
     ],
     "calculation": {
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LeaseCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of short-term lease cost, excluding expense for lease with term of one month or less.",
        "label": "Short-term Lease, Cost",
        "terseLabel": "Short-term lease cost"
       }
      }
     },
     "localname": "ShortTermLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/OperatingLeasesComponentsofLeaseCostDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2011 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2011 [Member]",
        "terseLabel": "2011"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2011Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2012 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2012 [Member]",
        "terseLabel": "2012"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2012Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2013 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2013 [Member]",
        "terseLabel": "2013"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2013Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2014 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2014 [Member]",
        "terseLabel": "2014"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2014Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2015 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2015 [Member]",
        "terseLabel": "2015"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2015Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year 2016 in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year 2016 [Member]",
        "terseLabel": "2016"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYear2016Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYearAxis": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by accident year in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year [Axis]",
        "terseLabel": "Short-duration Insurance Contracts, Accident Year [Axis]"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYearAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsAccidentYearDomain": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accident year in which a covered event occurs under the terms of the short-duration insurance contract.",
        "label": "Short-duration Insurance Contracts, Accident Year [Domain]",
        "terseLabel": "Short-duration Insurance Contracts, Accident Year [Domain]"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsAccidentYearDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock": {
     "auth_ref": [
      "r755"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of undiscounted information about claims development by accident year for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Claims Development [Table Text Block]",
        "verboseLabel": "Schedule of short-duration insurance contracts, claims development"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet": {
     "auth_ref": [
      "r754"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.",
        "label": "Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net",
        "terseLabel": "Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration [Line Items]",
        "terseLabel": "Short-duration Insurance Contracts, Historical Claims Duration [Line Items]"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of information about average annual percentage payout of incurred claims by age, after reinsurance, for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration [Table]",
        "terseLabel": "Short-duration Insurance Contracts, Historical Claims Duration [Table]"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the eighth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Eight",
        "terseLabel": "Year Eight"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the fifth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Five",
        "terseLabel": "Year Five"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the fourth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Four",
        "terseLabel": "Year Four"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the ninth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Nine",
        "terseLabel": "Year Nine"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the first year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year One",
        "terseLabel": "Year One"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the seventh year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Seven",
        "terseLabel": "Year Seven"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the sixth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Six",
        "terseLabel": "Year Six"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the tenth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Ten",
        "terseLabel": "Year Ten"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the third year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Three",
        "terseLabel": "Year Three"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of average annual payout, after reinsurance, in the second year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Historical Claims Duration, Year Two",
        "terseLabel": "Year Two"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesAverageAnnualPercentagePayoutOfIncurredClaimsbyAgeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet": {
     "auth_ref": [
      "r753"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.",
        "label": "Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net",
        "terseLabel": "Incurred Claims and Allocated Claim Adjustment Expense, Net of Reinsurance"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet": {
     "auth_ref": [
      "r755",
      "r756"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.",
        "label": "Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net",
        "verboseLabel": "Liabilities for claims and claim adjustment expenses, net of reinsurance"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented": {
     "auth_ref": [
      "r755"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense.",
        "label": "Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented",
        "terseLabel": "Outstanding prior to 2011"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem": {
     "auth_ref": [
      "r756"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of reconciling item for the reconciliation of the liability in the disclosure of claims development (in excess of) less than the liability for unpaid claims and claims adjustment expense for short-duration insurance contracts, classified as other.",
        "label": "Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item",
        "terseLabel": "Prior years paid",
        "verboseLabel": "Insurance lines other than short duration"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense": {
     "auth_ref": [
      "r756"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of liability for unallocated claim adjustment expense for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense",
        "terseLabel": "Unallocated claims adjustment expenses"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesReconciliationofNetIncurredandPaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims": {
     "auth_ref": [
      "r757"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cumulative number of reported claims for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contract, Cumulative Number of Reported Claims",
        "terseLabel": "Cumulative Number of Reported Claims"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsNumberOfReportedClaims",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesIncurredandPaidClaimsbyAccidentYearonaNetBasisDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock": {
     "auth_ref": [
      "r758"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of average annual percentage payout of incurred claims by age, after reinsurance, for short-duration insurance contracts.",
        "label": "Short-duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block]",
        "verboseLabel": "Schedule of average annual percentage payout of incurred claims by age, also referred to as a history of claims duration"
       }
      }
     },
     "localname": "ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ShorttermDebtFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.",
        "label": "Short-term Debt, Fair Value",
        "terseLabel": "Short-term debt"
       }
      }
     },
     "localname": "ShorttermDebtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsNotCarriedatFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r1",
      "r168",
      "r172",
      "r173",
      "r174",
      "r175",
      "r176",
      "r177",
      "r178",
      "r179",
      "r180",
      "r181",
      "r182",
      "r183",
      "r186",
      "r187",
      "r188",
      "r189",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r197",
      "r203",
      "r264",
      "r286",
      "r287",
      "r288",
      "r759"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Segments [Axis]",
        "terseLabel": "Segments [Axis]"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesDeferredPolicyAcquisitionCostsDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetGoodwillRollforwardDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/ReinsuranceandCatastrophesTotalAmountsofReinsuranceRecoverablesOnUnpaidInsuranceReservesDetails",
      "http://www.horacemann.com/role/SegmentInformationAdditionalSignificantFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/SegmentInformationSummarizedFinancialInformationbySegmentDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r34",
      "r128",
      "r129",
      "r130",
      "r133",
      "r141",
      "r143",
      "r157",
      "r240",
      "r300",
      "r305",
      "r453",
      "r454",
      "r455",
      "r488",
      "r489",
      "r570",
      "r571",
      "r572",
      "r573",
      "r574",
      "r576",
      "r775",
      "r776",
      "r777"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]",
        "terseLabel": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]",
        "terseLabel": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedStatementsofCashFlowsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Financial Position [Abstract]",
        "terseLabel": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Comprehensive Income [Abstract]",
        "terseLabel": "Statement of Comprehensive Income [Abstract]"
       }
      }
     },
     "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]",
        "terseLabel": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r128",
      "r129",
      "r130",
      "r157",
      "r631"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatutoryAccountingPracticesDisclosureTextBlock": {
     "auth_ref": [
      "r699",
      "r788",
      "r789",
      "r790",
      "r791",
      "r792"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of how the entity's reporting under GAAP as of the balance sheet date differs from the results based on prescribed and permitted accounting practices of the state or country of domicile in which a relevant statutory filing is made, or differences in results based on the National Association of Insurance Commissioners (NAIC) prescribed practices, or a combination thereof. Describes the accounting practices used and the related monetary effect on statutory surplus, net income, and risk-based capital. If an insurance enterprise's risk-based capital would have triggered a regulatory event had it not used a permitted practice, that fact is disclosed in the financial statements. Permitted statutory accounting practices include practices not prescribed but allowed by the domiciliary state insurance department regulatory authority.",
        "label": "Statutory Accounting Practices Disclosure [Table Text Block]",
        "verboseLabel": "Statutory surplus and subsidiary dividend restrictions"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments": {
     "auth_ref": [
      "r121"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of dividends available for payment after computation of statutory restrictions on capital surplus.",
        "label": "Statutory Accounting Practices, Statutory Amount Available for Dividend Payments",
        "verboseLabel": "Aggregate amount of dividends"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance": {
     "auth_ref": [
      "r689",
      "r786"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.",
        "label": "Statutory Accounting Practices, Statutory Capital and Surplus, Balance",
        "terseLabel": "Consolidated capital and surplus, statutory basis"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsReconciliationsofStatutoryCapitalSurplusandNetIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired": {
     "auth_ref": [
      "r787"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of statutory capital required to be maintained as of the balance sheet date under prescribed or permitted statutory accounting practices.",
        "label": "Statutory Accounting Practices, Statutory Capital and Surplus Required",
        "verboseLabel": "Minimum statutory-basis capital and surplus"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount": {
     "auth_ref": [
      "r689"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators.",
        "label": "Statutory Accounting Practices, Statutory Net Income Amount",
        "terseLabel": "Consolidated net income, statutory basis"
       }
      }
     },
     "localname": "StatutoryAccountingPracticesStatutoryNetIncomeAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/StatutoryInformationandDividendRestrictionsReconciliationsofStatutoryCapitalSurplusandNetIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": {
     "auth_ref": [
      "r15",
      "r16",
      "r300",
      "r305",
      "r426"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of share options (or share units) exercised during the current period.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period",
        "negatedLabel": "Options Outstanding, Exercised (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationStockOptionActivityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation": {
     "auth_ref": [
      "r15",
      "r16",
      "r305",
      "r417",
      "r434"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).",
        "label": "Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture",
        "verboseLabel": "Options exercised and conversion of common stock units and restricted stock units"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockRepurchaseProgramAuthorizedAmount1": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of stock repurchase plan authorized.",
        "label": "Stock Repurchase Program, Authorized Amount",
        "terseLabel": "Authorized repurchase amount"
       }
      }
     },
     "localname": "StockRepurchaseProgramAuthorizedAmount1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount remaining of a stock repurchase plan authorized.",
        "label": "Stock Repurchase Program, Remaining Authorized Repurchase Amount",
        "terseLabel": "Remaining authorized repurchase amount"
       }
      }
     },
     "localname": "StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockRepurchasedDuringPeriodShares": {
     "auth_ref": [
      "r15",
      "r16",
      "r300",
      "r305"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.",
        "label": "Stock Repurchased During Period, Shares",
        "terseLabel": "Shares reacquired during period (in shares)"
       }
      }
     },
     "localname": "StockRepurchasedDuringPeriodShares",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockRepurchasedDuringPeriodValue": {
     "auth_ref": [
      "r15",
      "r16",
      "r300",
      "r305"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.",
        "label": "Stock Repurchased During Period, Value",
        "terseLabel": "Shares reacquired during period, value"
       }
      }
     },
     "localname": "StockRepurchasedDuringPeriodValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r16",
      "r19",
      "r20",
      "r118",
      "r205",
      "r236",
      "r568"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "Stockholders' Equity Attributable to Parent",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance",
        "totalLabel": "Total shareholders' equity",
        "verboseLabel": "Stockholders' equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesNarrativeDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY",
      "http://www.horacemann.com/role/ComprehensiveIncomeLossandAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount": {
     "auth_ref": [
      "r844"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment held by insurance company, excluding investment in related party.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount",
        "verboseLabel": "Amount Shown in Balance Sheet"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost": {
     "auth_ref": [
      "r842"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cost of investment held by insurance company, excluding investment in related party.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost",
        "verboseLabel": "Cost"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue": {
     "auth_ref": [
      "r843"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of investment held by insurance company, excluding investment in related party.",
        "label": "SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value",
        "verboseLabel": "Fair Value"
       }
      }
     },
     "localname": "SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementalCashFlowElementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Supplemental Cash Flow Elements [Abstract]",
        "terseLabel": "Supplemental Cash Flow Elements [Abstract]"
       }
      }
     },
     "localname": "SupplementalCashFlowElementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Plan designed to provide limited group of employees with supplemental retirement benefits, in addition to other pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans.",
        "label": "Supplemental Employee Retirement Plan [Member]",
        "terseLabel": "Supplemental Defined Benefit Plans"
       }
      }
     },
     "localname": "SupplementalEmployeeRetirementPlanDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsComponentsofNetPeriodicCostChangesinPlanAssetsandBenefitObligationsandAOCIImpactsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsContributionsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsDefinedBenefitPlanandSupplementalRetirementPlansDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails",
      "http://www.horacemann.com/role/RetirementPlansandOtherPostretirementBenefitsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r748"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs.",
        "label": "Current Year Claims and Claims Adjustment Expense",
        "terseLabel": "Claims occurring in the current year",
        "verboseLabel": "Claims and claims adjustment expense incurred related to current year"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves": {
     "auth_ref": [
      "r736"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of discount deducted from reserve for unpaid claim and claim adjustment expense by property-casualty insurance underwriter.",
        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Discount Deducted from Reserve",
        "verboseLabel": "Discount, if any, deducted in previous column"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDiscountDeductedFromReserves",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r737"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of loss reported and paid for claim and claim adjustment expense by property-casualty insurance underwriter.",
        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Paid Claim and Claim Adjustment Expense",
        "verboseLabel": "Paid claims and claim adjustment expenses"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPaidClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r748"
     ],
     "calculation": {
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.",
        "label": "Prior Year Claims and Claims Adjustment Expense",
        "negatedLabel": "Claims and claims adjustment expense incurred related to prior years",
        "terseLabel": "Decrease in estimated reserves for claims occurring in prior years"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails",
      "http://www.horacemann.com/role/UnpaidClaimsandClaimExpensesSummaryofReinsuranceReserveBalancesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts": {
     "auth_ref": [
      "r724"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization of deferred policy acquisition cost recognized, as disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost",
        "verboseLabel": "Amortization of deferred policy acquisition costs"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense": {
     "auth_ref": [
      "r723"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of insurance benefit, claim, loss and settlement expenses incurred, as disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses",
        "verboseLabel": "Benefits, claims and settlement expenses"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts": {
     "auth_ref": [
      "r717"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred policy acquisition cost capitalized on contract remaining in force, as disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost",
        "verboseLabel": "Deferred policy acquisition costs"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves": {
     "auth_ref": [
      "r718"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of reserve for future policy claim payable and loss expense to be incurred, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense",
        "verboseLabel": "Future policy benefits, claims and claim expenses"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome": {
     "auth_ref": [
      "r722"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of net investment income earned, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income",
        "verboseLabel": "Net investment income"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationNetInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense": {
     "auth_ref": [
      "r725"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating expense classified as other, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense",
        "verboseLabel": "Other operating expenses"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationOtherOperatingExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable": {
     "auth_ref": [
      "r720"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of claim and benefit payable classified as other, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable",
        "verboseLabel": "Other policy claims and benefits payable"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationPremiumRevenue": {
     "auth_ref": [
      "r721"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of premium revenue earned, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue",
        "verboseLabel": "Premium revenue/ premium earned"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationPremiumRevenue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationPremiumsWritten": {
     "auth_ref": [
      "r726"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after premiums ceded and assumed, of premium written, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Written",
        "verboseLabel": "Premiums written"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationPremiumsWritten",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementaryInsuranceInformationUnearnedPremiums": {
     "auth_ref": [
      "r719"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of premium not yet earned, disclosed in supplementary insurance information.",
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Unearned Premium",
        "verboseLabel": "Unearned premiums"
       }
      }
     },
     "localname": "SupplementaryInsuranceInformationUnearnedPremiums",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleIIIandVISupplementaryInsuranceInformationSupplementalInformationConcerningPropertyandCasualtyInsuranceOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TradeNamesMember": {
     "auth_ref": [
      "r504"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Rights acquired through registration of a business name to gain or protect exclusive use thereof.",
        "label": "Trade Names [Member]",
        "terseLabel": "Trade names"
       }
      }
     },
     "localname": "TradeNamesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails",
      "http://www.horacemann.com/role/GoodwillandIntangibleAssetsnetSummaryofIndefiniteLivedIntangiblesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransferOfInvestments": {
     "auth_ref": [
      "r112",
      "r113",
      "r114"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of investments transferred from the entity's investments in noncash transactions.",
        "label": "Transfer from Investments",
        "terseLabel": "Transfer of investments and policy loans"
       }
      }
     },
     "localname": "TransferOfInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/SupplementalConsolidatedCashandCashFlowInformationNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r217",
      "r218",
      "r599",
      "r600",
      "r601",
      "r602",
      "r603",
      "r604",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r611",
      "r613",
      "r614",
      "r615",
      "r616",
      "r617",
      "r618",
      "r619",
      "r620",
      "r621",
      "r622",
      "r623",
      "r624",
      "r625",
      "r626",
      "r627",
      "r628",
      "r629"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.",
        "label": "Financial Instruments [Domain]",
        "terseLabel": "Financial Instruments [Domain]"
       }
      }
     },
     "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DepositAssetonReinsuranceNarrativeDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsMeasuredandCarriedatFairValueDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails",
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsTransfersBetweenDifferentFairValueLevelsDetails",
      "http://www.horacemann.com/role/InvestmentsFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails",
      "http://www.horacemann.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.horacemann.com/role/InvestmentsNetUnrealizedInvestmentGainsandLossesonFixedMaturitiesandEquitySecuritiesDetails",
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockAcquiredAverageCostPerShare": {
     "auth_ref": [
      "r306"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total cost of shares repurchased divided by the total number of shares repurchased.",
        "label": "Treasury Stock Acquired, Average Cost Per Share",
        "terseLabel": "Share price of treasury stock acquired during period (in usd per share)"
       }
      }
     },
     "localname": "TreasuryStockAcquiredAverageCostPerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_TreasuryStockMember": {
     "auth_ref": [
      "r33",
      "r306"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.",
        "label": "Treasury Stock [Member]",
        "verboseLabel": "Treasury stock, at cost"
       }
      }
     },
     "localname": "TreasuryStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockShares": {
     "auth_ref": [
      "r33",
      "r306"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.",
        "label": "Treasury Stock, Shares",
        "terseLabel": "Treasury stock (in shares)"
       }
      }
     },
     "localname": "TreasuryStockShares",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetAdditionalInformationDetails",
      "http://www.horacemann.com/role/ShareholdersEquityandShareBasedCompensationNarrativeDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TreasuryStockValue": {
     "auth_ref": [
      "r33",
      "r306",
      "r307"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 6.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.",
        "label": "Treasury Stock, Value",
        "negatedLabel": "Treasury stock, at cost, 2020, 24,902,579 shares; 2019, 24,850,484 shares",
        "negatedTerseLabel": "Treasury stock, at cost, 2020, 24,902,579 shares; 2019, 24,850,484 shares"
       }
      }
     },
     "localname": "TreasuryStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS",
      "http://www.horacemann.com/role/ScheduleIICondensedFinancialInformationofRegistrantCondensedBalanceSheetDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TreasuryStockValueAcquiredCostMethod": {
     "auth_ref": [
      "r300",
      "r305",
      "r306"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.",
        "label": "Treasury Stock, Value, Acquired, Cost Method",
        "negatedLabel": "Acquisition of shares"
       }
      }
     },
     "localname": "TreasuryStockValueAcquiredCostMethod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_USGovernmentDebtSecuritiesMember": {
     "auth_ref": [
      "r661"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities issued by the United States government.",
        "label": "US Government Debt Securities [Member]",
        "verboseLabel": "Other"
       }
      }
     },
     "localname": "USGovernmentDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsGrossUnrealizedLossesofFixedMaturitiesandEquitySecuritiesinUnrealizedLossPositionDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember": {
     "auth_ref": [
      "r339",
      "r661"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae).",
        "label": "US Government-sponsored Enterprises Debt Securities [Member]",
        "verboseLabel": "U.S. Government and federally sponsored agency obligations"
       }
      }
     },
     "localname": "USGovernmentSponsoredEnterprisesDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USStatesAndPoliticalSubdivisionsMember": {
     "auth_ref": [
      "r339",
      "r809"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.",
        "label": "US States and Political Subdivisions Debt Securities [Member]",
        "verboseLabel": "States, municipalities and political subdivisions"
       }
      }
     },
     "localname": "USStatesAndPoliticalSubdivisionsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/ScheduleISummaryofInvestmentsOtherThanInvestmentsinRelatedPartiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnamortizedDebtIssuanceExpense": {
     "auth_ref": [
      "r27"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.",
        "label": "Unamortized Debt Issuance Expense",
        "terseLabel": "Unamortized debt issuance costs"
       }
      }
     },
     "localname": "UnamortizedDebtIssuanceExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtSummaryofDebtDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnearnedPremiums": {
     "auth_ref": [
      "r682"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "hmn_PolicyLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount of premiums written on insurance contracts that have not been earned as of the balance sheet date.",
        "label": "Unearned Premiums",
        "verboseLabel": "Unearned premiums"
       }
      }
     },
     "localname": "UnearnedPremiums",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy": {
     "auth_ref": [
      "r746",
      "r752"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for estimating the ultimate cost of settling insurance claims relating to insured events that have occurred on or before a particular date (ordinarily, the statement of financial position date). The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claims adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims.",
        "label": "Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]",
        "verboseLabel": "Unpaid Claims and Claim Expenses"
       }
      }
     },
     "localname": "UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of unrealized gains and losses on investments.",
        "label": "Unrealized Gain (Loss) on Investments [Table Text Block]",
        "verboseLabel": "Reconciliation of net unrealized investment gains (losses) on fixed maturity securities and equity securities"
       }
      }
     },
     "localname": "UnrealizedGainLossOnInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_UnrecognizedTaxBenefits": {
     "auth_ref": [
      "r462",
      "r469"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of unrecognized tax benefits.",
        "label": "Unrecognized Tax Benefits",
        "periodEndLabel": "Balance as of the end of the year",
        "periodStartLabel": "Balance as of the beginning of the year"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions": {
     "auth_ref": [
      "r470"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.",
        "label": "Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions",
        "negatedLabel": "Decreases related to prior year tax positions"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities": {
     "auth_ref": [
      "r472"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.",
        "label": "Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions": {
     "auth_ref": [
      "r471"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.",
        "label": "Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions",
        "verboseLabel": "Increases related to current year tax positions"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions": {
     "auth_ref": [
      "r470"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.",
        "label": "Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions",
        "verboseLabel": "Increases related to prior year tax positions"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations": {
     "auth_ref": [
      "r473"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.",
        "label": "Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations",
        "negatedLabel": "Lapse of statute"
       }
      }
     },
     "localname": "UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r158",
      "r159",
      "r160",
      "r161",
      "r165",
      "r166",
      "r167"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.",
        "label": "Use of Estimates, Policy [Policy Text Block]",
        "terseLabel": "Use of Estimates"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationTechniqueAxis": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by valuation approach and technique.",
        "label": "Valuation Approach and Technique [Axis]",
        "terseLabel": "Valuation Approach and Technique [Axis]"
       }
      }
     },
     "localname": "ValuationTechniqueAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ValuationTechniqueDiscountedCashFlowMember": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation technique calculating present value of future cash flows.",
        "label": "Valuation Technique, Discounted Cash Flow [Member]",
        "terseLabel": "discounted cash flow"
       }
      }
     },
     "localname": "ValuationTechniqueDiscountedCashFlowMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ValuationTechniqueDomain": {
     "auth_ref": [
      "r548"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Valuation approach and technique.",
        "label": "Valuation Approach and Technique [Domain]",
        "terseLabel": "Valuation Approach and Technique [Domain]"
       }
      }
     },
     "localname": "ValuationTechniqueDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/FairValueofFinancialInstrumentsQuantitativeInformationaboutLevel3FairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]",
        "terseLabel": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VariableRateDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.",
        "label": "Variable Rate [Domain]",
        "terseLabel": "Variable Rate [Domain]"
       }
      }
     },
     "localname": "VariableRateDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/DebtNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]",
        "verboseLabel": "Weighted average number of common equivalent shares to reflect the dilutive effect of common stock equivalent securities"
       }
      }
     },
     "localname": "WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r145",
      "r150"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Weighted Average Number of Shares Outstanding, Diluted",
        "terseLabel": "Shares of common stock and equivalent shares - weighted average diluted (in shares)",
        "totalLabel": "Total common and common equivalent shares adjusted to calculate diluted earnings per share (in shares)",
        "verboseLabel": "Diluted (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r144",
      "r150"
     ],
     "calculation": {
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Weighted Average Number of Shares Outstanding, Basic",
        "netLabel": "Shares of common stock - weighted average basic (in shares)",
        "terseLabel": "Basic (in shares)",
        "verboseLabel": "Weighted average number of common shares during the period (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/BasisofPresentationandSignificantAccountingPoliciesCalculationofEarningsPerShareBasicandDilutedDetails",
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.horacemann.com/role/UnauditedSelectedQuarterlyFinancialDataDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WithdrawalFromContractHoldersFunds": {
     "auth_ref": [
      "r97"
     ],
     "calculation": {
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for a segregated fund account during the period.",
        "label": "Withdrawal from Contract Holders Funds",
        "negatedLabel": "Withdrawals and surrenders"
       }
      }
     },
     "localname": "WithdrawalFromContractHoldersFunds",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.horacemann.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    }
   },
   "unitCount": 9
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-04(Schedule I))",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=120391182&loc=d3e5864-122674"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(2))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3098-108585"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4273-108586"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "230",
   "URI": "http://asc.fasb.org/topic&trid=2134446"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(25))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(1)(iii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(e))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(e),(f))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(f))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(h)(1)(i))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(b))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21914-107793"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21930-107793"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(26)(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21711-107793"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21728-107793"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(26)(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1505-109256"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1252-109256"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e3842-109258"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e4984-109258"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "270",
   "URI": "http://asc.fasb.org/topic&trid=2126967"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "26",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8475-108599"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "http://asc.fasb.org/topic&trid=2134510"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121568769&loc=d3e25362-111560"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6283291-111563"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aaa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.1)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27340-111563"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6284393-111563"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6284393-111563"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6284393-111563"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6284393-111563"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6284393-111563"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.12)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "http://asc.fasb.org/topic&trid=2196928"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "321",
   "URI": "http://asc.fasb.org/extlink&oid=120269885&loc=SL75117546-209714"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=75018788&loc=d3e30768-111565"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.13(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(4)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.13)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(2)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(3)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922895-210455"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(i)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.14)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.17)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "((a)(1),(b))",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(2)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(3)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b),(d)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "350",
   "URI": "http://asc.fasb.org/topic&trid=2144416"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(b),22(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=SL6230698-112601"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "470",
   "URI": "http://asc.fasb.org/topic&trid=2208564"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(27)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(10)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(9)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29,30)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(j)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(l)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(o)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(p)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(q)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(s)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(1)(i)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(2)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "70",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "715",
   "URI": "http://asc.fasb.org/topic&trid=2235017"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121326096&loc=d3e4534-113899"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226013-175313"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b),(f)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(i)-(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(4)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(i)-(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226024-175313"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iv)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 14.D.2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 14.F)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120383193&loc=d3e11149-113907"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120383193&loc=d3e11178-113907"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "718",
   "URI": "http://asc.fasb.org/topic&trid=2228938"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32247-109318"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32280-109318"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e31931-109318"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32705-109319"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32857-109319"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "217",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=121610041&loc=d3e36027-109320"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.2)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(12))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463"
  },
  "r502": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "37",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464"
  },
  "r503": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=121598580&loc=d3e5263-128473"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=121598580&loc=d3e5333-128473"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "808",
   "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=d3e5283-111683"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41638-113959"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i),(j),(k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r535": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r536": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624181-113959"
  },
  "r537": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41641-113959"
  },
  "r538": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r539": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i-k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r540": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "182",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121582272&loc=SL5629052-113961"
  },
  "r541": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "15",
   "Topic": "815",
   "URI": "http://asc.fasb.org/subtopic&trid=2229187"
  },
  "r542": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "25",
   "Subparagraph": "(a)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986"
  },
  "r543": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "25",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986"
  },
  "r544": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "815",
   "URI": "http://asc.fasb.org/topic&trid=2229140"
  },
  "r545": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r546": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r547": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r548": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r549": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r550": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r551": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r552": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r553": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r554": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r555": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r556": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r557": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258"
  },
  "r558": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r559": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r560": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740"
  },
  "r561": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=d3e13220-108610"
  },
  "r562": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611"
  },
  "r563": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611"
  },
  "r564": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13476-108611"
  },
  "r565": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611"
  },
  "r566": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611"
  },
  "r567": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611"
  },
  "r568": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r569": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580"
  },
  "r570": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r571": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r572": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r573": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r574": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r575": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r576": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r577": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391"
  },
  "r578": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399"
  },
  "r579": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580"
  },
  "r580": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399"
  },
  "r581": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400"
  },
  "r582": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977"
  },
  "r583": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977"
  },
  "r584": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918631-209977"
  },
  "r585": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977"
  },
  "r586": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980"
  },
  "r587": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980"
  },
  "r588": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980"
  },
  "r589": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580"
  },
  "r590": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r591": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r592": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r593": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r594": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r595": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980"
  },
  "r596": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971"
  },
  "r597": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/subtopic&trid=77888251"
  },
  "r598": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "http://asc.fasb.org/extlink&oid=116635682&loc=d3e55717-112764"
  },
  "r599": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(i)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580"
  },
  "r600": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(ii)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r601": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r602": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r603": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r604": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r605": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r606": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r607": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r608": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r609": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e689-108580"
  },
  "r610": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r611": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r612": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719"
  },
  "r613": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728"
  },
  "r614": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729"
  },
  "r615": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r616": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r617": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r618": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)(i)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r619": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724391-108580"
  },
  "r620": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r621": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r622": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r623": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(5)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r624": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(6)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r625": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(7)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r626": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r627": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r628": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r629": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724394-108580"
  },
  "r630": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "http://asc.fasb.org/extlink&oid=119991564&loc=SL119991595-234733"
  },
  "r631": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r632": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959"
  },
  "r633": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "340",
   "Topic": "928",
   "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004"
  },
  "r634": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953"
  },
  "r635": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "940",
   "URI": "http://asc.fasb.org/subtopic&trid=2176304"
  },
  "r636": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(1)(a))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r637": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10)(1))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r638": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r639": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r640": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r641": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(15)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r642": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r643": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(17))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r644": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r645": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r646": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.13(3)(a))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r647": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.13,16)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r648": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r649": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.16)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r650": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.7(a)(3))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r651": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(c))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r652": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(g))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r653": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r654": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r655": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r656": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(26))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r657": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(27))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r658": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.1-5)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r659": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.9)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r660": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r661": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62557-112803"
  },
  "r662": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/subtopic&trid=2209399"
  },
  "r663": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822"
  },
  "r664": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64702-112823"
  },
  "r665": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823"
  },
  "r666": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Subparagraph": "e",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823"
  },
  "r667": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823"
  },
  "r668": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6480726&loc=d3e6691-158385"
  },
  "r669": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6480726&loc=d3e6691-158385"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580"
  },
  "r670": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387"
  },
  "r671": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6816-158387"
  },
  "r672": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387"
  },
  "r673": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639652&loc=d3e7104-158389"
  },
  "r674": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(13)(a)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r675": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(13)(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r676": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(15)(b)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r677": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r678": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r679": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580"
  },
  "r680": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(11))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r681": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r682": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(13)(a)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r683": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16)(a)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r684": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r685": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r686": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(19))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r687": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r688": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r689": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(c))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e557-108580"
  },
  "r690": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r691": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(6))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r692": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(7))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r693": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r694": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(f,g))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r695": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(h))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r696": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1,2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r697": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.13(a)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r698": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.16)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r699": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.23(c))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(14))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067"
  },
  "r700": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r701": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r702": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r703": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r704": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(22))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r705": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(23))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r706": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(3)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r707": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(3)(d))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r708": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(6))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r709": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(7)(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581"
  },
  "r710": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r711": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r712": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r713": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.3(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r714": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.4)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r715": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.5)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r716": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.5,6,7)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r717": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column B))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r718": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column C))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r719": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column D))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(210.5-03(11))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r720": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column E))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r721": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column F))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r722": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column G))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r723": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column H))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r724": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column I))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r725": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column J))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r726": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16(Column K))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r727": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-16)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r728": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column A))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915"
  },
  "r729": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column B))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(1))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r730": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column C))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r731": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column D))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r732": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column E))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r733": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column F))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r734": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r735": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r736": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-18(Column D))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e575016-122915"
  },
  "r737": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-18(Column J))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e575016-122915"
  },
  "r738": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "30",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121640578&loc=d3e10129-158409"
  },
  "r739": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r740": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638524&loc=SL117422543-158416"
  },
  "r741": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638524&loc=SL117422543-158416"
  },
  "r742": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638166&loc=d3e11522-158419"
  },
  "r743": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489"
  },
  "r744": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99404803&loc=d3e21412-158489"
  },
  "r745": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639894&loc=d3e13145-158430"
  },
  "r746": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14754-158437"
  },
  "r747": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r748": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r749": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r750": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(cc)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r751": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r752": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14784-158437"
  },
  "r753": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438"
  },
  "r754": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438"
  },
  "r755": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438"
  },
  "r756": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671315-158438"
  },
  "r757": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671317-158438"
  },
  "r758": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4G",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438"
  },
  "r759": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r760": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r761": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)(6)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r762": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r763": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r764": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14937-158439"
  },
  "r765": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439"
  },
  "r766": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439"
  },
  "r767": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782768-158439"
  },
  "r768": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441"
  },
  "r769": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(g)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783734-158441"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(24))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r770": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29E",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819541-158441"
  },
  "r771": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819544-158441"
  },
  "r772": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9C",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884803&loc=SL65671395-207642"
  },
  "r773": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r774": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r775": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r776": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r777": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r778": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r779": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(25))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r780": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r781": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r782": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r783": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r784": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r785": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/subtopic&trid=2560295"
  },
  "r786": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529"
  },
  "r787": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529"
  },
  "r788": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529"
  },
  "r789": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486098&loc=d3e24746-158529"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(7)(c))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r790": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486098&loc=d3e24790-158529"
  },
  "r791": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "505",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=82848697&loc=d3e24938-158530"
  },
  "r792": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "505",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=82848697&loc=d3e24959-158530"
  },
  "r793": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639140&loc=SL117422156-227712"
  },
  "r794": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=84167274&loc=d3e27175-158546"
  },
  "r795": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(a)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r796": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(b)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r797": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(b)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r798": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(b)(3)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r799": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(c)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(9)(a))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r800": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(c)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r801": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(c)(3)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r802": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r803": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99379264&loc=d3e27758-158548"
  },
  "r804": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99379264&loc=d3e27830-158548"
  },
  "r805": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6484091&loc=d3e19268-158472"
  },
  "r806": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r807": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r808": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(1)(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r809": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(a),(b))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r810": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r811": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=SL117422267-158473"
  },
  "r812": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=SL117422267-158473"
  },
  "r813": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638699&loc=SL117422397-158474"
  },
  "r814": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638699&loc=SL117422401-158474"
  },
  "r815": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121640538&loc=d3e32546-158582"
  },
  "r816": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195"
  },
  "r817": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "944",
   "URI": "http://asc.fasb.org/topic&trid=2303980"
  },
  "r818": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "210",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=118262064&loc=SL116631418-115840"
  },
  "r819": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "210",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=118262064&loc=SL116631419-115840"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r820": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611133-123010"
  },
  "r821": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r822": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r823": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r824": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r825": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r826": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r827": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r828": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r829": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r830": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r831": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r832": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r833": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r834": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column E)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r835": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column F)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r836": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13(Column G)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010"
  },
  "r837": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010"
  },
  "r838": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010"
  },
  "r839": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "220",
   "URI": "http://asc.fasb.org/topic&trid=2134417"
  },
  "r840": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-14)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611322-123010"
  },
  "r841": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column A))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r842": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r843": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r844": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r845": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r846": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "http://asc.fasb.org/subtopic&trid=2324412"
  },
  "r847": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "740",
   "Topic": "954",
   "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650"
  },
  "r848": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Subparagraph": "(d)",
   "Topic": "958",
   "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916"
  },
  "r849": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585"
  },
  "r850": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 4))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r851": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r852": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-23"
  },
  "r853": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r854": {
   "Name": "Form 10-K",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "310"
  },
  "r855": {
   "Name": "Form 20-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "220",
   "Subsection": "f"
  },
  "r856": {
   "Name": "Form 40-F",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "240",
   "Subsection": "f"
  },
  "r857": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r858": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r859": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r860": {
   "Footnote": "4",
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "28"
  },
  "r861": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "Column B",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r862": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "Column C",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r863": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "Column D",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r864": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "Column E",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r865": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "Column F",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r866": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "a",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "04"
  },
  "r867": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "15"
  },
  "r868": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "16"
  },
  "r869": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "17"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r870": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "(m)",
   "Publisher": "SEC",
   "Section": "4",
   "Subparagraph": "(1)(iii)",
   "Subsection": "08"
  },
  "r871": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "c",
   "Publisher": "SEC",
   "Section": "5",
   "Subparagraph": "Schedule I",
   "Subsection": "04"
  },
  "r872": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "c",
   "Publisher": "SEC",
   "Section": "7",
   "Subparagraph": "Schedule II",
   "Subsection": "05"
  },
  "r873": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "9",
   "Subsection": "06"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19)(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585"
  }
 },
 "version": "2.1"
}
