{
 "instance": {
  "focs-20200630x10q.htm": {
   "axisCustom": 0,
   "axisStandard": 17,
   "contextCount": 244,
   "dts": {
    "calculationLink": {
     "local": [
      "focs-20200630_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "focs-20200630_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml",
      "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "focs-20200630x10q.htm"
     ]
    },
    "labelLink": {
     "local": [
      "focs-20200630_lab.xml"
     ],
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml",
      "http://xbrl.fasb.org/srt/2019/elts/srt-doc-2019-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "focs-20200630_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml",
      "http://xbrl.fasb.org/srt/2019/elts/srt-ref-2019-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "focs-20200630.xsd"
     ],
     "remote": [
      "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/lrr/role/negated-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.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/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd",
      "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd",
      "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd"
     ]
    }
   },
   "elementCount": 461,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2019-01-31": 6,
    "http://focusfinancialpartners.com/20200630": 1,
    "http://xbrl.sec.gov/dei/2019-01-31": 5,
    "total": 12
   },
   "keyCustom": 76,
   "keyStandard": 281,
   "memberCustom": 33,
   "memberStandard": 29,
   "nsprefix": "focs",
   "nsuri": "http://focusfinancialpartners.com/20200630",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "00090 - Document - Document and Entity Information",
     "role": "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:NonControllingInterestsAndIncomeLossPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10301 - Disclosure - NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE",
     "role": "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShare",
     "shortName": "NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:NonControllingInterestsAndIncomeLossPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10401 - Disclosure - ACQUISITIONS",
     "role": "http://focusfinancialpartners.com/role/DisclosureAcquisitions",
     "shortName": "ACQUISITIONS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10501 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS",
     "role": "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssets",
     "shortName": "GOODWILL AND OTHER INTANGIBLE ASSETS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10601 - Disclosure - FAIR VALUE MEASUREMENTS",
     "role": "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurements",
     "shortName": "FAIR VALUE MEASUREMENTS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10701 - Disclosure - CREDIT FACILITY",
     "role": "http://focusfinancialpartners.com/role/DisclosureCreditFacility",
     "shortName": "CREDIT FACILITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10801 - Disclosure - DERIVATIVES",
     "role": "http://focusfinancialpartners.com/role/DisclosureDerivatives",
     "shortName": "DERIVATIVES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10901 - Disclosure - EQUITY",
     "role": "http://focusfinancialpartners.com/role/DisclosureEquity",
     "shortName": "EQUITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11001 - Disclosure - INCOME TAXES",
     "role": "http://focusfinancialpartners.com/role/DisclosureIncomeTaxes",
     "shortName": "INCOME TAXES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:TaxReceivableAgreementsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11101 - Disclosure - TAX RECEIVABLE AGREEMENTS",
     "role": "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreements",
     "shortName": "TAX RECEIVABLE AGREEMENTS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:TaxReceivableAgreementsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11201 - Disclosure - COMMITMENTS AND CONTINGENCIES",
     "role": "http://focusfinancialpartners.com/role/DisclosureCommitmentsAndContingencies",
     "shortName": "COMMITMENTS AND CONTINGENCIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00100 - Statement - Unaudited Condensed Consolidated Balance Sheets",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
     "shortName": "Unaudited Condensed Consolidated Balance Sheets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11301 - Disclosure - CASH FLOW INFORMATION",
     "role": "http://focusfinancialpartners.com/role/DisclosureCashFlowInformation",
     "shortName": "CASH FLOW INFORMATION",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11401 - Disclosure - RELATED PARTIES",
     "role": "http://focusfinancialpartners.com/role/DisclosureRelatedParties",
     "shortName": "RELATED PARTIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:OtherDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "11501 - Disclosure - OTHER",
     "role": "http://focusfinancialpartners.com/role/DisclosureOther",
     "shortName": "OTHER",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:OtherDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "20202 - Disclosure - SUMMARY OF ACCOUNTING POLICIES (Policies)",
     "role": "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies",
     "shortName": "SUMMARY OF ACCOUNTING POLICIES (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:RevenueRecognitionPolicyTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30203 - Disclosure - SUMMARY OF ACCOUNTING POLICIES (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesTables",
     "shortName": "SUMMARY OF ACCOUNTING POLICIES (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:RevenueRecognitionPolicyTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "focs:NonControllingInterestsAndIncomeLossPerShareTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfControllingAndNoncontrollingInterestTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30303 - Disclosure - NON-CONTROLLING INTERESTS AND INCOME (LOSS) PER SHARE (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestsAndIncomeLossPerShareTables",
     "shortName": "NON-CONTROLLING INTERESTS AND INCOME (LOSS) PER SHARE (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "focs:NonControllingInterestsAndIncomeLossPerShareTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfControllingAndNoncontrollingInterestTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfPurchasePriceAssociatedWithBusinessAcquisitionsAndAllocationOfConsiderationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30403 - Disclosure - ACQUISITIONS (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureAcquisitionsTables",
     "shortName": "ACQUISITIONS (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfPurchasePriceAssociatedWithBusinessAcquisitionsAndAllocationOfConsiderationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfGoodwillTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30503 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsTables",
     "shortName": "GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfGoodwillTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30603 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsTables",
     "shortName": "FAIR VALUE MEASUREMENTS (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30703 - Disclosure - CREDIT FACILITY (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCreditFacilityTables",
     "shortName": "CREDIT FACILITY (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllowanceForDoubtfulAccountsReceivable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00105 - Statement - Unaudited Condensed Consolidated Balance Sheets (Parenthetical)",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
     "shortName": "Unaudited Condensed Consolidated Balance Sheets (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AllowanceForDoubtfulAccountsReceivable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "30903 - Disclosure - EQUITY (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureEquityTables",
     "shortName": "EQUITY (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "focs:ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:ScheduleOfCondensedCashFlowStatementTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "31303 - Disclosure - CASH FLOW INFORMATION (Tables)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationTables",
     "shortName": "CASH FLOW INFORMATION (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "srt:ScheduleOfCondensedCashFlowStatementTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40201 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Revenue (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails",
     "shortName": "SUMMARY OF ACCOUNTING POLICIES - Revenue (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "us-gaap:RevenueRecognitionPolicyTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_srt_StatementGeographicalAxis_country_US_Ghn8NG6yIEy5IYWVyWl_Yw",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40301 - Disclosure - NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
     "shortName": "NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "focs:ScheduleOfReconciliationOfNetLossAvailableToCommonStockholdersTableTextBlock",
       "focs:NonControllingInterestsAndIncomeLossPerShareTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "lang": null,
      "name": "focs:NetIncomeLossAttributableToNoncontrollingInterestSubsequentToIpo",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Goodwill",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40401 - Disclosure - ACQUISITIONS - Business Acquisitions (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
     "shortName": "ACQUISITIONS - Business Acquisitions (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "focs:ScheduleOfPurchasePriceAssociatedWithBusinessAcquisitionsAndAllocationOfConsiderationTableTextBlock",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_us-gaap_BusinessAcquisitionAxis_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_iPowoAKaMUe_0v5_0lD4LQ",
      "decimals": "-3",
      "lang": null,
      "name": "focs:BusinessCombinationCashDueSubsequentToClosingAtNetPresentValueAndEstimatedWorkingCapitalAdjustment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40402 - Disclosure - ACQUISITIONS - Asset Acquisitions (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
     "shortName": "ACQUISITIONS - Asset Acquisitions (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfGoodwillTextBlock",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_Wmw_T0Ta-0WqSOJHwkgVqA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:GoodwillGross",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40501 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Change in goodwill (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails",
     "shortName": "GOODWILL AND OTHER INTANGIBLE ASSETS - Change in goodwill (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfGoodwillTextBlock",
       "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2018_Q6rD6NFV3k-7EH15JSwXgw",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:GoodwillGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FiniteLivedIntangibleAssetsGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40502 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS- Intangible assets (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails",
     "shortName": "GOODWILL AND OTHER INTANGIBLE ASSETS- Intangible assets (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FiniteLivedIntangibleAssetsGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtLongtermAndShorttermCombinedAmount",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40601 - Disclosure - FAIR VALUE MEASUREMENTS - Implied fair value (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails",
     "shortName": "FAIR VALUE MEASUREMENTS - Implied fair value (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_us-gaap_CreditFacilityAxis_focs_FirstLienTermLoanMember_uWNMFT08U0CM7alTh_XuJQ",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DebtInstrumentFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_Wmw_T0Ta-0WqSOJHwkgVqA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "focs:FairValueEstimatedContingentConsiderationBusinessAcquisition",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40602 - Disclosure - FAIR VALUE MEASUREMENTS - Changes in the fair value (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails",
     "shortName": "FAIR VALUE MEASUREMENTS - Changes in the fair value (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "lang": null,
      "name": "focs:AdditionsToEstimatedContingentConsideration",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00200 - Statement - Unaudited Condensed Consolidated Statements of Operations",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations",
     "shortName": "Unaudited Condensed Consolidated Statements of Operations",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:LaborAndRelatedExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_srt_RangeAxis_srt_MinimumMember_us-gaap_MeasurementInputTypeAxis_us-gaap_MeasurementInputInceptionDiscountRateMember_kaWGEkzBvEWLb8p4yiHcNg",
      "decimals": "1",
      "first": true,
      "lang": null,
      "name": "us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40603 - Disclosure - FAIR VALUE MEASUREMENTS - Contingent consideration (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails",
     "shortName": "FAIR VALUE MEASUREMENTS - Contingent consideration (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_srt_RangeAxis_srt_MinimumMember_us-gaap_MeasurementInputTypeAxis_us-gaap_MeasurementInputInceptionDiscountRateMember_kaWGEkzBvEWLb8p4yiHcNg",
      "decimals": "1",
      "first": true,
      "lang": null,
      "name": "us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtInstrumentFaceAmount",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40701 - Disclosure - CREDIT FACILITY - Old and New Credit Facility (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
     "shortName": "CREDIT FACILITY - Old and New Credit Facility (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2019_To_12_31_2019_CiGZNMvvykCD49HcOREL-Q",
      "decimals": "-3",
      "lang": null,
      "name": "focs:ContingentPrincipalPayments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:UnamortizedDebtIssuanceExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40702 - Disclosure - CREDIT FACILITY - Reconciliation of Principal Amounts Outstanding (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
     "shortName": "CREDIT FACILITY - Reconciliation of Principal Amounts Outstanding (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_6_30_2020_C5CYAk1WYESCp4JvnXURlw",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:UnamortizedDebtIssuanceExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_Wmw_T0Ta-0WqSOJHwkgVqA",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtWeightedAverageInterestRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40703 - Disclosure - CREDIT FACILITY - First Lien Revolver and Letters of Credit (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
     "shortName": "CREDIT FACILITY - First Lien Revolver and Letters of Credit (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_Wmw_T0Ta-0WqSOJHwkgVqA",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtWeightedAverageInterestRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_4_30_2020_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_InterestRateSwapMember_PBzSdmDvX0yZtLU9JfrpxQ",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "focs:NumberOfInterestRateSwapAgreements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_agreement_uGkqmPH1x0mhoc5Q5Dl7bA",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40801 - Disclosure - DERIVATIVES (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
     "shortName": "DERIVATIVES (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_4_30_2020_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_InterestRateSwapMember_PBzSdmDvX0yZtLU9JfrpxQ",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "focs:NumberOfInterestRateSwapAgreements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_agreement_uGkqmPH1x0mhoc5Q5Dl7bA",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_6_1_2020_To_6_30_2020_us-gaap_StatementClassOfStockAxis_us-gaap_CommonClassAMember_rRYsJ0UhYkeUk55YT9FA8g",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_shares_76OUXg3omEy8TExe_eXJmg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40901 - Disclosure - EQUITY (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
     "shortName": "EQUITY (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_6_1_2020_To_6_30_2020_us-gaap_StatementClassOfStockAxis_us-gaap_CommonClassAMember_rRYsJ0UhYkeUk55YT9FA8g",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockIssuedDuringPeriodSharesNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_shares_76OUXg3omEy8TExe_eXJmg",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "focs:ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_us-gaap_AwardTypeAxis_focs_IncentiveUnitsMember_I0pbM9nvi0yhrpCHQqwzKA",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_shares_76OUXg3omEy8TExe_eXJmg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "40902 - Disclosure - EQUITY - Focus LLC Incentive Unit (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails",
     "shortName": "EQUITY - Focus LLC Incentive Unit (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "focs:ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock",
       "ix:continuation",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2019_us-gaap_AwardTypeAxis_focs_IncentiveUnitsMember_I0pbM9nvi0yhrpCHQqwzKA",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_shares_76OUXg3omEy8TExe_eXJmg",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "3",
      "first": true,
      "lang": null,
      "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41001 - Disclosure - INCOME TAXES (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureIncomeTaxesDetails",
     "shortName": "INCOME TAXES (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "3",
      "first": true,
      "lang": null,
      "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_pure_TjX9zg06f0-rDr58Fl9j6Q",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "focs:TaxReceivableAgreementsTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_7_30_2018_To_7_30_2018_MeboFvLnIkqdqdnHxg-m0g",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "focs:NumberOfTaxReceivableAgreements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_agreement_uGkqmPH1x0mhoc5Q5Dl7bA",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41101 - Disclosure - TAX RECEIVABLE AGREEMENTS (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreementsDetails",
     "shortName": "TAX RECEIVABLE AGREEMENTS (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "focs:TaxReceivableAgreementsTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_7_30_2018_To_7_30_2018_MeboFvLnIkqdqdnHxg-m0g",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "focs:NumberOfTaxReceivableAgreements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_agreement_uGkqmPH1x0mhoc5Q5Dl7bA",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LossContingencyLossInPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41201 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCommitmentsAndContingenciesDetails",
     "shortName": "COMMITMENTS AND CONTINGENCIES (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LossContingencyLossInPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00300 - Statement - Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss)",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss",
     "shortName": "Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "srt:ScheduleOfCondensedCashFlowStatementTableTextBlock",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestPaidNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41301 - Disclosure - CASH FLOW INFORMATION (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails",
     "shortName": "CASH FLOW INFORMATION (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "srt:ScheduleOfCondensedCashFlowStatementTableTextBlock",
       "us-gaap:CashFlowSupplementalDisclosuresTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestPaidNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41401 - Disclosure - RELATED PARTIES (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureRelatedPartiesDetails",
     "shortName": "RELATED PARTIES (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_4_1_2020_To_6_30_2020_7MtwvVMqYUGKt5IQJqjtgQ",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "focs:OtherDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2019_To_3_31_2019_ePFq8-tyGEqvCkXhFQE44Q",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ManagementFeeExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "41501 - Disclosure - OTHER (Details)",
     "role": "http://focusfinancialpartners.com/role/DisclosureOtherDetails",
     "shortName": "OTHER (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "focs:OtherDisclosureTextBlock",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2019_To_3_31_2019_ePFq8-tyGEqvCkXhFQE44Q",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ManagementFeeExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00400 - Statement - Unaudited Condensed Consolidated Statements of Cash Flows",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
     "shortName": "Unaudited Condensed Consolidated Statements of Cash Flows",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OtherDepreciationAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2018_us-gaap_StatementEquityComponentsAxis_us-gaap_ParentMember_rRmKuQoRn02RwQpaeNRzCA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "00500 - Statement - Unaudited Condensed Consolidated Statements of Changes in Members' Deficit/Shareholders' Equity",
     "role": "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
     "shortName": "Unaudited Condensed Consolidated Statements of Changes in Members' Deficit/Shareholders' Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "As_Of_12_31_2018_us-gaap_StatementEquityComponentsAxis_us-gaap_ParentMember_rRmKuQoRn02RwQpaeNRzCA",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Unit_Standard_USD_gf_hZ1fcf0CxJK8Ik57FDg",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10101 - Disclosure - GENERAL",
     "role": "http://focusfinancialpartners.com/role/DisclosureGeneral",
     "shortName": "GENERAL",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "10201 - Disclosure - SUMMARY OF ACCOUNTING POLICIES",
     "role": "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPolicies",
     "shortName": "SUMMARY OF ACCOUNTING POLICIES",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "div",
       "div",
       "body",
       "html"
      ],
      "baseRef": "focs-20200630x10q.htm",
      "contextRef": "Duration_1_1_2020_To_6_30_2020_mQ-vJxyESEmy5cThOtz6dA",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 62,
   "tag": {
    "country_US": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "U [S]",
        "terseLabel": "Domestic revenue"
       }
      }
     },
     "localname": "US",
     "nsuri": "http://xbrl.sec.gov/country/2017-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "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"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "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"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "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"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in CCYY 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"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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 CCYY-MM-DD.",
        "label": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r298"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r299"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "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"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r300"
     ],
     "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"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r300"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r300"
     ],
     "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"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "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"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r301"
     ],
     "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"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r300"
     ],
     "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"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r300"
     ],
     "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"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r300"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r300"
     ],
     "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"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r296"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r297"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "focs_ActualTotalSecuredLeverageRatio": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Actual total secured leverage ratio maintained by the company.",
        "label": "Actual Total Secured Leverage Ratio",
        "terseLabel": "Actual total secured leverage ratio"
       }
      }
     },
     "localname": "ActualTotalSecuredLeverageRatio",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "focs_AdditionsToEstimatedContingentConsideration": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents Fair Value additions to estimated contingent consideration.",
        "label": "Additions To Estimated Contingent Consideration",
        "terseLabel": "Additions to estimated contingent consideration"
       }
      }
     },
     "localname": "AdditionsToEstimatedContingentConsideration",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_AdjustmentsToAdditionalPaidInCapitalChangeInNonControllingInterestAllocation": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease)  in additional paid in capital (APIC) for the change in non-controlling interest allocation.",
        "label": "Adjustments to Additional Paid in Capital, Change in Non-controlling Interest Allocation",
        "terseLabel": "Change in non-controlling interest allocation"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalChangeInNonControllingInterestAllocation",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_AdjustmentsToAdditionalPaidInCapitalForfeitureOfUnvestedCommonStock": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in additional paid in capital (APIC) resulting from forfeiture of unvested common stock.",
        "label": "Adjustments to Additional Paid in Capital Forfeiture of Unvested Common Stock",
        "negatedLabel": "Forfeiture of unvested Class A common stock"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalForfeitureOfUnvestedCommonStock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_AmortizationOfDebtFinancingCosts": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 4.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization expense attributable to debt financing costs.",
        "label": "Amortization of Debt Financing Costs",
        "negatedLabel": "Amortization of debt financing costs",
        "terseLabel": "Amortization of debt financing costs"
       }
      }
     },
     "localname": "AmortizationOfDebtFinancingCosts",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_AmountOfDilutiveNoncontrollingInterestRelatedToCommonAndIncentiiveUnits": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from noncontrolling interests related to common and incentive units.",
        "label": "Amount Of Dilutive Noncontrolling Interest Related To Common And Incentiive Units",
        "terseLabel": "Add: Dilutive effect of non-controlling interests related to Focus LLC common and incentive units"
       }
      }
     },
     "localname": "AmountOfDilutiveNoncontrollingInterestRelatedToCommonAndIncentiiveUnits",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_BusinessAcquisitionGoodwillExpectedTaxDeductibleAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of goodwill and intangible assets arising from a business combination that is expected to be deductible for tax purposes.",
        "label": "Business Acquisition, Goodwill, Expected Tax Deductible Amount",
        "terseLabel": "Amount of goodwill and intangibles expected to be deductible for tax purposes"
       }
      }
     },
     "localname": "BusinessAcquisitionGoodwillExpectedTaxDeductibleAmount",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_BusinessCombinationCashDueSubsequentToClosingAtNetPresentValueAndEstimatedWorkingCapitalAdjustment": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_BusinessCombinationConsiderationTransferred1",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of business during the period due subsequent to closing at net present value.",
        "label": "Business Combination Cash Due Subsequent To Closing At Net Present Value And Estimated Working Capital Adjustment",
        "terseLabel": "Estimated working capital adjustment"
       }
      }
     },
     "localname": "BusinessCombinationCashDueSubsequentToClosingAtNetPresentValueAndEstimatedWorkingCapitalAdjustment",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_BusinessCombinationEstimatedContingentConsiderationFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_BusinessCombinationConsiderationTransferred1",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of fair market value of estimated contingent consideration for the business combination.",
        "label": "Business Combination, Estimated Contingent Consideration, Fair Value",
        "terseLabel": "Fair market value of estimated contingent consideration"
       }
      }
     },
     "localname": "BusinessCombinationEstimatedContingentConsiderationFairValue",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_BusinessCombinationsGoodwillAndIntangibleAssetsAcquiredAmortizationPeriodOfDeductibilityForTaxPurposes": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The period of deductibility for tax purposes of the amortization of goodwill and intangible assets acquired in a business acquisition.",
        "label": "Business Combinations, Goodwill and Intangible Assets Acquired, Amortization, Period of Deductibility for Tax Purposes",
        "terseLabel": "Deductibility period for goodwill and intangible assets acquired in a business acquisition (in years)"
       }
      }
     },
     "localname": "BusinessCombinationsGoodwillAndIntangibleAssetsAcquiredAmortizationPeriodOfDeductibilityForTaxPurposes",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "focs_ChangesInFairValueOfEstimatedContingentConsideration": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 6.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of changes in fair value of estimated contingent consideration.",
        "label": "Changes in Fair Value of Estimated Contingent Consideration",
        "negatedLabel": "Non-cash changes in fair value of estimated contingent consideration"
       }
      }
     },
     "localname": "ChangesInFairValueOfEstimatedContingentConsideration",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_CommonUnitEquivalentsOfOutstandingVestedAndUnvestedIncentiveUnitsHeldByContinuingOwners": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 1.0,
       "parentTag": "focs_CommonUnitsAndUnitEquivalentsAttributableToNonControllingInterest",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of common unit equivalents of outstanding vested and unvested incentive units held by continuing owners.",
        "label": "Common Unit Equivalents of Outstanding Vested and Unvested Incentive Units Held By Continuing Owners",
        "terseLabel": "Common unit equivalents of outstanding vested and unvested incentive units held by continuing owners"
       }
      }
     },
     "localname": "CommonUnitEquivalentsOfOutstandingVestedAndUnvestedIncentiveUnitsHeldByContinuingOwners",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_CommonUnitsAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of common units acquired during the period.",
        "label": "Common Units Acquired",
        "terseLabel": "Common units acquired (in shares)"
       }
      }
     },
     "localname": "CommonUnitsAcquired",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_CommonUnitsAndUnitEquivalentsAttributableToNonControllingInterest": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of common units and common unit equivalents attributable to non-controlling interest.",
        "label": "Common Units And Unit Equivalents Attributable To Non Controlling Interest",
        "totalLabel": "Total common units and common unit equivalents attributable to non-controlling interest"
       }
      }
     },
     "localname": "CommonUnitsAndUnitEquivalentsAttributableToNonControllingInterest",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_CommonUnitsHeldByContinuingOwners": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 2.0,
       "parentTag": "focs_CommonUnitsAndUnitEquivalentsAttributableToNonControllingInterest",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of common units held by continuing owners.",
        "label": "Common Units, Held by Continuing Owners",
        "terseLabel": "Focus LLC common units held by continuing owners"
       }
      }
     },
     "localname": "CommonUnitsHeldByContinuingOwners",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_ConsolidatedEarningsBeforeInterestTaxesDepreciationAndAmortization": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of consolidated earnings before before interest, taxes, depreciation, and amortization.",
        "label": "Consolidated Earnings Before Interest, Taxes, Depreciation, and Amortization",
        "terseLabel": "Consolidated EBITDA"
       }
      }
     },
     "localname": "ConsolidatedEarningsBeforeInterestTaxesDepreciationAndAmortization",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ContingentPrincipalPayments": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of contingent principal payments due.",
        "label": "Contingent Principal Payments",
        "terseLabel": "Contingent Principal Payments"
       }
      }
     },
     "localname": "ContingentPrincipalPayments",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ContingentPrincipalPaymentsCurrentYear": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of contingent principal payments due in current year.",
        "label": "Contingent Principal Payments Current Year",
        "terseLabel": "Contingent principal payments due in current year"
       }
      }
     },
     "localname": "ContingentPrincipalPaymentsCurrentYear",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ConvertibleIncentiveUnits": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total number of vested and unvested incentive units convertible.",
        "label": "Convertible Incentive Units",
        "terseLabel": "Convertible incentive units"
       }
      }
     },
     "localname": "ConvertibleIncentiveUnits",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_DeemedCapitalContributionRequisiteServicePeriodRecognition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase to deemed capital contribution from recognition of equity-based compensation.",
        "label": "Deemed Capital Contribution, Requisite Service Period Recognition",
        "verboseLabel": "Non-cash equity compensation expense"
       }
      }
     },
     "localname": "DeemedCapitalContributionRequisiteServicePeriodRecognition",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_DeferredIncomeTaxExpenseBenefitAndOtherNoncashIncomeExpense": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations and income (expense) included in net income that results in no cash inflow (outflow), classified as other.",
        "label": "Deferred Income Tax Expense (Benefit) and Other Noncash Income (Expense)",
        "negatedLabel": "Deferred taxes and other non-cash items"
       }
      }
     },
     "localname": "DeferredIncomeTaxExpenseBenefitAndOtherNoncashIncomeExpense",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_DepreciationAndOtherAmortization": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 7.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "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 And Other Amortization",
        "terseLabel": "Depreciation and other amortization"
       }
      }
     },
     "localname": "DepreciationAndOtherAmortization",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_DocumentAndEntityInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Document and Entity Information"
       }
      }
     },
     "localname": "DocumentAndEntityInformationAbstract",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "xbrltype": "stringItemType"
    },
    "focs_FairValueEstimatedContingentConsiderationBusinessAcquisition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the fair value of estimated contingent consideration for business acquisitions.",
        "label": "Fair Value Estimated Contingent Consideration Business Acquisition",
        "periodEndLabel": "Balance at end of period",
        "periodStartLabel": "Balance at beginning of period"
       }
      }
     },
     "localname": "FairValueEstimatedContingentConsiderationBusinessAcquisition",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_FairValueOfEstimatedContingentConsiderationOther": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the fair value of estimated contingent consideration that is recorded in other.",
        "label": "Fair Value Of Estimated Contingent Consideration Other",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "FairValueOfEstimatedContingentConsiderationOther",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_FirstLienRevolverStepDownOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents First lien revolver step down one.",
        "label": "First Lien Revolver Step Down One [Member]",
        "terseLabel": "First Lien Revolver Step Down One"
       }
      }
     },
     "localname": "FirstLienRevolverStepDownOneMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FirstLienRevolverStepDownThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the first lien revolver step down three.",
        "label": "First Lien Revolver Step Down Three [Member]",
        "terseLabel": "First Lien Revolver Step Down Three"
       }
      }
     },
     "localname": "FirstLienRevolverStepDownThreeMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FirstLienRevolverStepDownTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the first lien revolver step down two.",
        "label": "First Lien Revolver Step Down Two [Member]",
        "terseLabel": "First Lien Revolver Step Down Two"
       }
      }
     },
     "localname": "FirstLienRevolverStepDownTwoMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FirstLienRevolvingCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to First Lien Revolving Credit Facility.",
        "label": "First Lien Revolving Credit Facility [Member]",
        "terseLabel": "First Lien Revolver"
       }
      }
     },
     "localname": "FirstLienRevolvingCreditFacilityMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FirstLienTermLoanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to First Lien Term Loan.",
        "label": "First Lien Term Loan [Member]",
        "terseLabel": "First Lien Term Loan"
       }
      }
     },
     "localname": "FirstLienTermLoanMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FloatingToFixedInterestRateSwapAgreementOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to floating to fixed interest rate swap agreement one.",
        "label": "Floating To Fixed Interest Rate Swap Agreement One [Member]",
        "terseLabel": "Floating to fixed interest rate swap one"
       }
      }
     },
     "localname": "FloatingToFixedInterestRateSwapAgreementOneMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FloatingToFixedInterestRateSwapAgreementTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to floating to fixed interest rate swap agreement two.",
        "label": "Floating To Fixed Interest Rate Swap Agreement Two [Member]",
        "terseLabel": "Floating to fixed interest rate swap two"
       }
      }
     },
     "localname": "FloatingToFixedInterestRateSwapAgreementTwoMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_FocusFinancialPartnersLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information pertains to Focus Financial Partners LLC.",
        "label": "Focus Financial Partners L L C [Member]",
        "terseLabel": "Focus LLC"
       }
      }
     },
     "localname": "FocusFinancialPartnersLLCMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_ForfeitureOfUnvestedCommonStock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "It represents the forfeiture of unvested common stock.",
        "label": "Forfeiture of Unvested Common Stock",
        "negatedLabel": "Forfeiture of unvested Class A common stock (in shares)"
       }
      }
     },
     "localname": "ForfeitureOfUnvestedCommonStock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_GainsLossesOnExtinguishmentOfDebtNonCash": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Difference between the fair value of payments made and the carrying amount of debt non cash portion which is extinguished prior to maturity.",
        "label": "Gains Losses On Extinguishment Of Debt Non Cash",
        "negatedLabel": "Loss on extinguishment of borrowings"
       }
      }
     },
     "localname": "GainsLossesOnExtinguishmentOfDebtNonCash",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_HurdleRate1.42Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 1.42.",
        "label": "Hurdle Rate1.42 [Member]",
        "terseLabel": "Hurdle Rate $1.42"
       }
      }
     },
     "localname": "HurdleRate1.42Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate11.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 11.00",
        "label": "Hurdle Rate11.00 [Member]",
        "terseLabel": "Hurdle Rate 11.00"
       }
      }
     },
     "localname": "HurdleRate11.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate12.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 12.00.",
        "label": "Hurdle Rate12.00 [Member]",
        "terseLabel": "Hurdle Rate 12.00"
       }
      }
     },
     "localname": "HurdleRate12.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate13.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 13.00.",
        "label": "Hurdle Rate13.00 [Member]",
        "terseLabel": "Hurdle Rate 13.00"
       }
      }
     },
     "localname": "HurdleRate13.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate14.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 14.00.",
        "label": "Hurdle Rate14.00 [Member]",
        "terseLabel": "Hurdle Rate 14.00"
       }
      }
     },
     "localname": "HurdleRate14.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate16.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 16.00.",
        "label": "Hurdle Rate16.00 [Member]",
        "terseLabel": "Hurdle Rate 16.00"
       }
      }
     },
     "localname": "HurdleRate16.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate17.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 17.00.",
        "label": "Hurdle Rate17.00 [Member]",
        "terseLabel": "Hurdle Rate 17.00"
       }
      }
     },
     "localname": "HurdleRate17.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate19.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 19.00.",
        "label": "Hurdle Rate19.00 [Member]",
        "terseLabel": "Hurdle Rate 19.00"
       }
      }
     },
     "localname": "HurdleRate19.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate21.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 21.00.",
        "label": "Hurdle Rate21.00 [Member]",
        "terseLabel": "Hurdle Rate 21.00"
       }
      }
     },
     "localname": "HurdleRate21.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate22.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 22.00.",
        "label": "Hurdle Rate22.00 [Member]",
        "terseLabel": "Hurdle Rate 22.00"
       }
      }
     },
     "localname": "HurdleRate22.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate23.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle rate 23.0.",
        "label": "Hurdle Rate23.00 [Member]",
        "terseLabel": "Hurdle Rate 23.00"
       }
      }
     },
     "localname": "HurdleRate23.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate26.26Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle rate 26.26.",
        "label": "Hurdle Rate26.26 [Member]",
        "terseLabel": "Hurdle Rate 26.26"
       }
      }
     },
     "localname": "HurdleRate26.26Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate27.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle rate 27.0.",
        "label": "Hurdle Rate27.00 [Member]",
        "terseLabel": "Hurdle Rate 27.00"
       }
      }
     },
     "localname": "HurdleRate27.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate27.90Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle rate 27.90.",
        "label": "Hurdle Rate27.90 [Member]",
        "terseLabel": "Hurdle Rate 27.90"
       }
      }
     },
     "localname": "HurdleRate27.90Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate28.50Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle 28.50.",
        "label": "Hurdle Rate28.50 [Member]",
        "terseLabel": "Hurdle Rate 28.50"
       }
      }
     },
     "localname": "HurdleRate28.50Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate33.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to hurdle rate 33.0.",
        "label": "Hurdle Rate33.00 [Member]",
        "terseLabel": "Hurdle Rate 33.00"
       }
      }
     },
     "localname": "HurdleRate33.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate36.64Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represent information pertaining to hurdle rate 36.64.",
        "label": "Hurdle Rate36.64 [Member]",
        "terseLabel": "Hurdle Rate 36.64"
       }
      }
     },
     "localname": "HurdleRate36.64Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate5.50Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 5.50.",
        "label": "Hurdle Rate5.50 [Member]",
        "terseLabel": "Hurdle Rate 5.50"
       }
      }
     },
     "localname": "HurdleRate5.50Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate6.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 6.00.",
        "label": "Hurdle Rate6.00 [Member]",
        "terseLabel": "Hurdle Rate 6.00"
       }
      }
     },
     "localname": "HurdleRate6.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate7.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 7.00.",
        "label": "Hurdle Rate7.00 [Member]",
        "terseLabel": "Hurdle Rate 7.00"
       }
      }
     },
     "localname": "HurdleRate7.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_HurdleRate9.00Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to Hurdle Rate 9.00.",
        "label": "Hurdle Rate9.00 [Member]",
        "terseLabel": "Hurdle Rate 9.00"
       }
      }
     },
     "localname": "HurdleRate9.00Member",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_IncentiveUnitsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents information pertaining to incentive units.",
        "label": "Incentive Units [Member]",
        "terseLabel": "Incentive Units"
       }
      }
     },
     "localname": "IncentiveUnitsMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_IncentiveUnitsRetiredDuringPeriodShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of incentive units retired during the period.",
        "label": "Incentive Units Retired During Period Shares",
        "terseLabel": "Inventive units retired (in shares)"
       }
      }
     },
     "localname": "IncentiveUnitsRetiredDuringPeriodShares",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_IncrementalCommonSharesAttributableToNoncontrollingInterests": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of non-controlling interests related to common and incentive units.",
        "label": "Incremental Common Shares Attributable To Noncontrolling Interests",
        "terseLabel": "Effect of non-controlling interests related to Focus LLC common and incentive units"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToNoncontrollingInterests",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_IncrementalCommonSharesAttributableToStockOptions": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of stock options.",
        "label": "Incremental Common Shares Attributable To Stock Options",
        "terseLabel": "Effect of dilutive stock options"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToStockOptions",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_IncrementalCommonSharesAttributableToUnvestedCommonStockAndRestrictiveStockUnits": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of unvested common stock and restricted stock units.",
        "label": "Incremental Common Shares Attributable To Unvested Common Stock And Restrictive Stock Units",
        "terseLabel": "Effect of dilutive unvested Class A common stock and restricted stock units"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToUnvestedCommonStockAndRestrictiveStockUnits",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_InitialAdjustmentOfDeferredTaxAssetsNetOfAmountsPayableUnderTaxReceivableAgreements": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of initial adjustment of deferred tax assets, net of amounts payable under tax receivable agreements and changes from LLC interest transactions.",
        "label": "Initial Adjustment of Deferred Tax Assets, Net of Amounts Payable Under Tax Receivable Agreements",
        "terseLabel": "Adjustment of deferred tax assets, net of amounts payable under tax receivable agreements and changes from Focus LLC interest transactions"
       }
      }
     },
     "localname": "InitialAdjustmentOfDeferredTaxAssetsNetOfAmountsPayableUnderTaxReceivableAgreements",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_LineOfCreditFacilityAccordionFeature": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of accordion feature in Line of Credit Facility.",
        "label": "Line of Credit Facility Accordion Feature",
        "terseLabel": "Accordion feature"
       }
      }
     },
     "localname": "LineOfCreditFacilityAccordionFeature",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ManagementContractBuyout": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 4.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Management contract buyout.",
        "label": "Management Contract Buyout",
        "terseLabel": "Management contract buyout"
       }
      }
     },
     "localname": "ManagementContractBuyout",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ManagementFees": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the management fees for the company.",
        "label": "Management Fees",
        "terseLabel": "Management fees"
       }
      }
     },
     "localname": "ManagementFees",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_MarketBasedStockOptionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This member stands for market based stock options.",
        "label": "Market Based Stock Options [Member]",
        "terseLabel": "Market based stock options"
       }
      }
     },
     "localname": "MarketBasedStockOptionsMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_NetIncomeLossAttributableToNoncontrollingInterestSubsequentToIpo": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest subsequent to the Initial Public Offering (IPO).",
        "label": "Net Income Loss Attributable To Noncontrolling Interest Subsequent To IPO",
        "negatedLabel": "Non-controlling interest"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterestSubsequentToIpo",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NonCashChangesInFairValueOfEstimatedContingentConsideration": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the non-cash changes in fair value of estimated contingent consideration.",
        "label": "Non-cash Changes in Fair value of Estimated Contingent Consideration",
        "terseLabel": "Non-cash changes in fair value of estimated contingent consideration"
       }
      }
     },
     "localname": "NonCashChangesInFairValueOfEstimatedContingentConsideration",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NonCashOrPartNonCashAcquisitionLeaseLiabilityOperatingLease": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The value of the noncash (or part noncash) consideration given for Lease liability related to operating leases.",
        "label": "Non Cash Or Part Non Cash Acquisition, Lease Liability, Operating Lease",
        "verboseLabel": "Operating lease liabilities"
       }
      }
     },
     "localname": "NonCashOrPartNonCashAcquisitionLeaseLiabilityOperatingLease",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NonCashOrPartNonCashAcquisitionRightOfUseAssetOperatingLease": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The value of the noncash (or part noncash) consideration given for Right of use asset related to operating leases.",
        "label": "Non Cash Or Part Non Cash Acquisition, Right of Use Asset, Operating Lease",
        "verboseLabel": "Operating lease assets"
       }
      }
     },
     "localname": "NonCashOrPartNonCashAcquisitionRightOfUseAssetOperatingLease",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NonControllingInterestsAndIncomeLossPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "n/a",
        "label": "NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE"
       }
      }
     },
     "localname": "NonControllingInterestsAndIncomeLossPerShareAbstract",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "xbrltype": "stringItemType"
    },
    "focs_NonControllingInterestsAndIncomeLossPerShareTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for Non-controlling Interests and Income (Loss) Per Share.",
        "label": "Non Controlling Interests And Income (Loss) Per Share [Text Block]",
        "terseLabel": "NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE"
       }
      }
     },
     "localname": "NonControllingInterestsAndIncomeLossPerShareTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShare"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_NonOperatingIncomeExpenseAndOtherExpenseNet": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of non operating income expense and other expense net.",
        "label": "Non Operating Income Expense And Other Expense Net",
        "totalLabel": "Total other expense-net"
       }
      }
     },
     "localname": "NonOperatingIncomeExpenseAndOtherExpenseNet",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NoncashOrPartNoncashFairMarketValueOfEstimatedContingentConsiderationInConnectionWithAcquisitions": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair market value of estimated contingent consideration in connection with acquisitions.",
        "label": "Noncash or Part Noncash, Fair Market Value of Estimated Contingent Consideration in Connection With Acquisitions",
        "terseLabel": "Fair market value of estimated contingent consideration in connection with acquisitions"
       }
      }
     },
     "localname": "NoncashOrPartNoncashFairMarketValueOfEstimatedContingentConsiderationInConnectionWithAcquisitions",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_NumberOfAssetAcquisitionsCompleted": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of asset acquisitions completed.",
        "label": "Number of Asset Acquisitions Completed",
        "terseLabel": "Number of asset acquisitions"
       }
      }
     },
     "localname": "NumberOfAssetAcquisitionsCompleted",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "focs_NumberOfBusinessAcquisitionsDuringPeriodWhichAreNewSubsidiaryPartnerFirms": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of business acquisitions closed during the period which are new subsidiary partner firms",
        "label": "Number of Business Acquisitions During the Period Which are New Subsidiary Partner Firms",
        "terseLabel": "Number of business acquisitions closed during the period which are new subsidiary partner firms"
       }
      }
     },
     "localname": "NumberOfBusinessAcquisitionsDuringPeriodWhichAreNewSubsidiaryPartnerFirms",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "focs_NumberOfInterestRateSwapAgreements": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of interest rate swap agreements.",
        "label": "Number of Interest Rate Swap Agreements",
        "terseLabel": "Number of interest rate swap agreements"
       }
      }
     },
     "localname": "NumberOfInterestRateSwapAgreements",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "focs_NumberOfTaxReceivableAgreements": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of tax receivable agreements.",
        "label": "Number of Tax Receivable Agreements",
        "terseLabel": "Number of tax receivable agreements"
       }
      }
     },
     "localname": "NumberOfTaxReceivableAgreements",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreementsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "focs_OtherDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "No definition available.",
        "label": "OTHER"
       }
      }
     },
     "localname": "OtherDisclosureAbstract",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "xbrltype": "stringItemType"
    },
    "focs_OtherDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure of other information.",
        "label": "Other Disclosure [Text Block]",
        "terseLabel": "OTHER"
       }
      }
     },
     "localname": "OtherDisclosureTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureOther"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_OtherServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to other services.",
        "label": "Other Services [Member]",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "OtherServicesMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "focs_PaymentOfDistributions": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of cash outflow related to payment of distributions.",
        "label": "Payment of Distributions",
        "negatedLabel": "Distributions for unitholders"
       }
      }
     },
     "localname": "PaymentOfDistributions",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_PaymentsOfContingentConsideration": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents fair value payments of contingent consideration.",
        "label": "Payments of Contingent Consideration",
        "negatedLabel": "Payments of contingent consideration"
       }
      }
     },
     "localname": "PaymentsOfContingentConsideration",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_PaymentsOfContingentConsiderationInCash": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents fair value payments of contingent consideration in cash.",
        "label": "Payments Of Contingent Consideration In Cash",
        "terseLabel": "Contingent consideration paid in cash"
       }
      }
     },
     "localname": "PaymentsOfContingentConsiderationInCash",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_PercentageOfPaymentsToEachHolderOfTaxReceivableAgreementsOnNetCashSavings": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The percentage of payment by Focus Inc. to each TRA holder of the net cash savings.",
        "label": "Percentage of Payments to Each Holder of Tax Receivable Agreements on Net Cash Savings",
        "terseLabel": "Payment to TRA holder on net cash savings (as a percent)"
       }
      }
     },
     "localname": "PercentageOfPaymentsToEachHolderOfTaxReceivableAgreementsOnNetCashSavings",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreementsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "focs_PercentageOfRetainedBenefitOnNetCashSavings": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The percentage of benefit retained on cash savings.",
        "label": "Percentage of Retained Benefit on Net Cash Savings",
        "terseLabel": "Retained benefit on net cash savings (as a percent)"
       }
      }
     },
     "localname": "PercentageOfRetainedBenefitOnNetCashSavings",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreementsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "focs_ReserveForUncertainTaxPositions": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of reserve for uncertain tax positions.",
        "label": "Reserve for Uncertain Tax Positions",
        "terseLabel": "Uncertain tax positions reserve"
       }
      }
     },
     "localname": "ReserveForUncertainTaxPositions",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureIncomeTaxesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_ScheduleOfControllingAndNoncontrollingInterestTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the calculation of controlling and non-controlling interest.",
        "label": "Schedule Of Controlling And Noncontrolling Interest [Table Text Block]",
        "terseLabel": "Schedule of controlling and non-controlling interest"
       }
      }
     },
     "localname": "ScheduleOfControllingAndNoncontrollingInterestTableTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestsAndIncomeLossPerShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_ScheduleOfPurchasePriceAssociatedWithBusinessAcquisitionsAndAllocationOfConsiderationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The tabular disclosure of purchase price associated with business acquisitions and the allocation thereof.",
        "label": "Schedule of Purchase Price Associated with Business Acquisitions and Allocation of Consideration [Table Text Block]",
        "terseLabel": "Schedule of purchase price associated with business acquisitions and the allocation thereof"
       }
      }
     },
     "localname": "ScheduleOfPurchasePriceAssociatedWithBusinessAcquisitionsAndAllocationOfConsiderationTableTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_ScheduleOfReconciliationOfNetLossAvailableToCommonStockholdersTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of reconciliation of net loss before noncontrolling interest to net loss available to common stockholders.",
        "label": "Schedule of Reconciliation of Net Loss Available to Common Stockholders [Table Text Block]",
        "terseLabel": "Schedule of reconciliation of net income before noncontrolling interest to net income (loss) attributable to common stockholders"
       }
      }
     },
     "localname": "ScheduleOfReconciliationOfNetLossAvailableToCommonStockholdersTableTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestsAndIncomeLossPerShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_ScheduleOfShareBasedCompensationStockOptionsNonvestedActivityTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the number and weighted-average grant date fair value for stock options that were unvested at the beginning and end of the year, and the number of stock options were granted, forfeited and vested during the year.",
        "label": "Schedule Of Share Based Compensation Stock Options Nonvested Activity [Table Text Block]",
        "terseLabel": "Schedule of unvested stock"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockOptionsNonvestedActivityTableTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of share-based payment award, non-option equity instruments.",
        "label": "Schedule of Share-based Payment Award, Non-Option Equity Instruments [Table Text Block]",
        "terseLabel": "Schedule of incentive units granted"
       }
      }
     },
     "localname": "ScheduleOfShareBasedPaymentAwardNonOptionEquityInstrumentsTableTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_SecuredLeverageRatioThresholdForRequiredContingentPrincipalPayments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The First Lien Leverage Ratio that the entity must not equal or exceed without being subject to contingent principal payments based on excess cash flow, as defined in the Credit Facility.",
        "label": "Secured Leverage Ratio Threshold For Required Contingent Principal Payments",
        "terseLabel": "Secured leverage ratio threshold for contingent principal payments"
       }
      }
     },
     "localname": "SecuredLeverageRatioThresholdForRequiredContingentPrincipalPayments",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "pureItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExchangedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "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 exchanged 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, Exchanged, Weighted Average Grant Date Fair Value",
        "terseLabel": "Exchanged"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExchangedWeightedAverageGrantDateFairValue",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "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 vested.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Weighted Average Grant Date Fair Value",
        "terseLabel": "Vested at the end of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The weighted average fair value of vested and nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value",
        "periodEndLabel": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValue",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardHurdleRate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The hurdle rate for incentive units.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Hurdle Rate",
        "terseLabel": "Hurdle Rates"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardHurdleRate",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExchanged": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares under non-option equity instrument agreements that were exchanged as a result of occurrence of a terminating event.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exchanged",
        "negatedLabel": "Exchanged"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExchanged",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of the outstanding equity based awards that are vested.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested",
        "terseLabel": "Vested at the end of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdVolumeWeightedAveragePerSharePriceTrigger": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Threshold volume weighted average per share price trigger for any ninety calendar day period within such five year period immediately following the pricing of the IPO.",
        "label": "Share Based Compensation Arrangement by Share Based Payment Award, Threshold Volume Weighted Average Per Share Price Trigger",
        "terseLabel": "Threshold volume weighted average per share price trigger"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdVolumeWeightedAveragePerSharePriceTrigger",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "focs_ShareBasedCompensationArrangementByShareBasedPaymentAwardVolumeWeightedAveragePerSharePriceThresholdPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Volume weighted average per share trigger price threshold period within such five year period immediately following the pricing of the IPO.",
        "label": "Share Based Compensation Arrangement by Share Based Payment Award, Volume Weighted Average Per Share Price, Threshold Period",
        "terseLabel": "Threshold period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardVolumeWeightedAveragePerSharePriceThresholdPeriod",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "focs_StockIssuedCancelledSharesInConnectionWithExchangeOfCommonUnits": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the shares stock issued/cancelled in connection with the exchange of Focus LLC common units.",
        "label": "Stock Issued (Cancelled) Shares In Connection With Exchange of Common Units",
        "terseLabel": "Issuance (cancellation) of common stock in connection with exercise of Focus LLC common unit exchange rights (in shares)"
       }
      }
     },
     "localname": "StockIssuedCancelledSharesInConnectionWithExchangeOfCommonUnits",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_StockIssuedCancelledSharesInConnectionWithExchangeOfIncentiveUnit": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the shares stock issued/cancelled in connection with the exchange of Focus LLC incentive units.",
        "label": "Stock Issued (Cancelled) Shares In Connection With Exchange of Incentive Unit",
        "terseLabel": "Issuance of common stock in connection with exercise of Focus LLC incentive unit exchange rights (in shares)"
       }
      }
     },
     "localname": "StockIssuedCancelledSharesInConnectionWithExchangeOfIncentiveUnit",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_StockIssuedCancelledValueInConnectionWithExchangeOfCommonUnits": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents value of stock issued/cancelled in connection with the exchange of Focus LLC common units.",
        "label": "Stock Issued (Cancelled) Value In Connection With Exchange of Common Units",
        "terseLabel": "Issuance (cancellation) of common stock in connection with exercise of Focus LLC common unit exchange rights"
       }
      }
     },
     "localname": "StockIssuedCancelledValueInConnectionWithExchangeOfCommonUnits",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_StockIssuedCancelledValueInConnectionWithExchangeOfIncentiveUnit": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents value of stock issued/cancelled in connection with the exchange of Focus LLC incentive units.",
        "label": "Stock Issued (Cancelled) Value In Connection With Exchange of Incentive Unit",
        "terseLabel": "Issuance of common stock in connection with exercise of Focus LLC incentive unit exchange rights"
       }
      }
     },
     "localname": "StockIssuedCancelledValueInConnectionWithExchangeOfIncentiveUnit",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_StockIssuedDuringPeriodSharesStockOptionsAndWarrantsExercised": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of share options and warrants (or share units) exercised during the current period.",
        "label": "Stock Issued During Period Shares Stock Options And Warrants Exercised",
        "terseLabel": "Exercise of stock options (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsAndWarrantsExercised",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_StockIssuedDuringPeriodValueStockOptionsAndWarrantsExercised": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock issued as a result of the exercise of stock options and warrants.",
        "label": "Stock Issued During Period Value Stock Options And Warrants Exercised",
        "terseLabel": "Exercise of stock options"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueStockOptionsAndWarrantsExercised",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_StockRetiredDuringPeriodShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares retired during the period.",
        "label": "Stock Retired During Period, Shares",
        "terseLabel": "Common stock retired (in shares)"
       }
      }
     },
     "localname": "StockRetiredDuringPeriodShares",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "focs_TaxReceivableAgreementObligation": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liability recorded for tax receivable agreement obligation.",
        "label": "Tax Receivable Agreement, Obligation",
        "terseLabel": "TRA obligations"
       }
      }
     },
     "localname": "TaxReceivableAgreementObligation",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_TaxReceivableAgreementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "No definition available.",
        "label": "TAX RECEIVABLE AGREEMENTS"
       }
      }
     },
     "localname": "TaxReceivableAgreementsAbstract",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "xbrltype": "stringItemType"
    },
    "focs_TaxReceivableAgreementsObligation": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of tax receivable agreements obligation.",
        "label": "Tax Receivable Agreements Obligation",
        "terseLabel": "Tax receivable agreements obligations"
       }
      }
     },
     "localname": "TaxReceivableAgreementsObligation",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "focs_TaxReceivableAgreementsTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure of information relating to tax receivable agreements.",
        "label": "Tax Receivable Agreements [Text block]",
        "terseLabel": "TAX RECEIVABLE AGREEMENTS"
       }
      }
     },
     "localname": "TaxReceivableAgreementsTextBlock",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureTaxReceivableAgreements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "focs_WealthManagementServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the information pertaining to wealth management services.",
        "label": "Wealth Management Services [Member]",
        "terseLabel": "Wealth management fees"
       }
      }
     },
     "localname": "WealthManagementServicesMember",
     "nsuri": "http://focusfinancialpartners.com/20200630",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Upper limit of the provided range.",
        "label": "Maximum [Member]",
        "terseLabel": "Maximum"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lower limit of the provided range.",
        "label": "Minimum [Member]",
        "terseLabel": "Minimum"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_OwnershipAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment.",
        "label": "Ownership [Axis]"
       }
      }
     },
     "localname": "OwnershipAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_OwnershipDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment.",
        "label": "Ownership [Domain]",
        "terseLabel": "Ownership [Domain]"
       }
      }
     },
     "localname": "OwnershipDomain",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r104",
      "r153",
      "r155",
      "r290",
      "r291"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by product and service, or group of similar products and similar services.",
        "label": "Product and Service [Axis]"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Product or service, or a group of similar products or similar services.",
        "label": "Products And Services [Domain]",
        "terseLabel": "Product and Service [Domain]"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.",
        "label": "Range [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.",
        "label": "Range [Member]",
        "terseLabel": "Range [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ScheduleOfCondensedCashFlowStatementTableTextBlock": {
     "auth_ref": [
      "r304"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations.",
        "label": "Condensed Cash Flow Statement [Table Text Block]",
        "terseLabel": "Schedule of supplemental cash flow information"
       }
      }
     },
     "localname": "ScheduleOfCondensedCashFlowStatementTableTextBlock",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Geographical area.",
        "label": "Segment Geographical [Domain]",
        "terseLabel": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r105",
      "r153",
      "r156",
      "r292",
      "r294",
      "r295",
      "r302",
      "r303"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by geographical components.",
        "label": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "SUMMARY OF ACCOUNTING POLICIES"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountsPayableCurrentAndNoncurrent": {
     "auth_ref": [
      "r269",
      "r284"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 8.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.",
        "label": "Accounts Payable",
        "terseLabel": "Accounts payable"
       }
      }
     },
     "localname": "AccountsPayableCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableNet": {
     "auth_ref": [
      "r8",
      "r277"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 8.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.",
        "label": "Accounts Receivable, Net",
        "terseLabel": "Accounts receivable less allowances of $684 at 2019 and $997 at 2020"
       }
      }
     },
     "localname": "AccountsReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccruedLiabilitiesCurrentAndNoncurrent": {
     "auth_ref": [
      "r269",
      "r284"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 7.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.",
        "label": "Accrued Liabilities",
        "terseLabel": "Accrued expenses"
       }
      }
     },
     "localname": "AccruedLiabilitiesCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r23",
      "r25",
      "r26"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax",
        "terseLabel": "Accumulated other comprehensive loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r22",
      "r26",
      "r27",
      "r210"
     ],
     "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": "Accumulated Other Comprehensive Income [Member]",
        "terseLabel": "Accumulated Other Comprehensive Loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems": {
     "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": "Acquired Finite-Lived Intangible Assets [Line Items]",
        "terseLabel": "Asset Acquisitions",
        "verboseLabel": "Amortizing acquired intangible assets"
       }
      }
     },
     "localname": "AcquiredFiniteLivedIntangibleAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife": {
     "auth_ref": [
      "r126"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Acquired Finite-lived Intangible Assets, Weighted Average Useful Life",
        "terseLabel": "Weighted-average useful life of all intangibles acquired"
       }
      }
     },
     "localname": "AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_AdditionalPaidInCapital": {
     "auth_ref": [
      "r9"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "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. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.",
        "label": "Additional Paid in Capital",
        "terseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapital",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [],
     "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]",
        "terseLabel": "Additional Paid-In Capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "Adjustments to reconcile net income to net cash provided by operating activities-net of effect of acquisitions:"
       }
      }
     },
     "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r161",
      "r175",
      "r178"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.",
        "label": "Allocated Share-based Compensation Expense",
        "terseLabel": "Compensation expense recognized",
        "verboseLabel": "Non-cash equity compensation expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivable": {
     "auth_ref": [
      "r106",
      "r111",
      "r112",
      "r113"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on accounts receivable.",
        "label": "Allowance for Doubtful Accounts Receivable",
        "terseLabel": "Accounts receivable, allowances"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfIntangibleAssets": {
     "auth_ref": [
      "r59",
      "r124",
      "r131"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 16.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 5.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "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 amortization"
       }
      }
     },
     "localname": "AmortizationOfIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r89"
     ],
     "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",
        "verboseLabel": "Antidilutive shares"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AociDerivativeQualifyingAsHedgeExcludedComponentAfterTax": {
     "auth_ref": [
      "r235"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after tax, of accumulated gain (loss) from increase (decrease) in value of excluded component of derivative hedge.",
        "label": "AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax",
        "verboseLabel": "Offsetting adjustment in fair value in AOCI net of tax"
       }
      }
     },
     "localname": "AociDerivativeQualifyingAsHedgeExcludedComponentAfterTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r102",
      "r264",
      "r278"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "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"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "ASSETS"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AwardTypeAxis": {
     "auth_ref": [
      "r162",
      "r176"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of award under share-based payment arrangement.",
        "label": "Award Type [Axis]"
       }
      }
     },
     "localname": "AwardTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "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]"
       }
      }
     },
     "localname": "BalanceSheetLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationDomain": {
     "auth_ref": [
      "r222",
      "r225"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BaseRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum rate investor will accept.",
        "label": "Base Rate [Member]",
        "terseLabel": "Base rate"
       }
      }
     },
     "localname": "BaseRateMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "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]",
        "terseLabel": "Basis of Presentation"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessAcquisitionAcquireeDomain": {
     "auth_ref": [],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAxis": {
     "auth_ref": [
      "r186",
      "r187"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business combination or series of individually immaterial business combinations.",
        "label": "Business Acquisition [Axis]"
       }
      }
     },
     "localname": "BusinessAcquisitionAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionLineItems": {
     "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": "Business Acquisition [Line Items]",
        "terseLabel": "ACQUISITIONS"
       }
      }
     },
     "localname": "BusinessAcquisitionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferred1": {
     "auth_ref": [
      "r193",
      "r194",
      "r196"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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",
        "totalLabel": "Total consideration"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferred1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferredAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combination, Consideration Transferred [Abstract]",
        "terseLabel": "Consideration:"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferredAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationContingentConsiderationLiability": {
     "auth_ref": [
      "r192",
      "r195",
      "r198"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "label": "Business Combination, Contingent Consideration, Liability",
        "terseLabel": "Estimated contingent consideration"
       }
      }
     },
     "localname": "BusinessCombinationContingentConsiderationLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput": {
     "auth_ref": [
      "r240"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure contingent consideration liability from business combination.",
        "label": "Business Combination, Contingent Consideration, Liability, Measurement Input",
        "terseLabel": "Estimated contingent consideration (in percent)"
       }
      }
     },
     "localname": "BusinessCombinationContingentConsiderationLiabilityMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_BusinessCombinationDisclosureTextBlock": {
     "auth_ref": [
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).",
        "label": "Business Combination Disclosure [Text Block]",
        "terseLabel": "ACQUISITIONS"
       }
      }
     },
     "localname": "BusinessCombinationDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitions"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual": {
     "auth_ref": [
      "r185"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.",
        "label": "Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual",
        "terseLabel": "Income from acquired entity in business acquisitions"
       }
      }
     },
     "localname": "BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual": {
     "auth_ref": [
      "r185"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.",
        "label": "Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual",
        "terseLabel": "Revenue from acquired entity in business acquisitions"
       }
      }
     },
     "localname": "BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": {
     "auth_ref": [
      "r188",
      "r189"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "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": "Finite-lived intangible assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities": {
     "auth_ref": [
      "r189"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities assumed at the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities",
        "negatedLabel": "Total liabilities assumed"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment": {
     "auth_ref": [
      "r188",
      "r189"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of property, plant, and equipment recognized as of the acquisition date.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment",
        "terseLabel": "Total tangible assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet": {
     "auth_ref": [
      "r189"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.",
        "label": "Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net",
        "totalLabel": "Total allocated consideration"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]",
        "terseLabel": "Allocation of purchase price:"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "ACQUISITIONS"
       }
      }
     },
     "localname": "BusinessCombinationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CashAndCashEquivalentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cash and Cash Equivalents [Abstract]",
        "terseLabel": "CASH AND CASH EQUIVALENTS:"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r1",
      "r14",
      "r61"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 9.0,
       "parentTag": "us-gaap_Assets",
       "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. Also includes 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. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash and Cash Equivalents, at Carrying Value",
        "terseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r55",
      "r61",
      "r66"
     ],
     "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": "End of period",
        "periodStartLabel": "Beginning of period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r55",
      "r246"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "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": "CHANGE IN CASH AND CASH EQUIVALENTS"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]",
        "terseLabel": "Supplemental non-cash cash flow information:"
       }
      }
     },
     "localname": "CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CashFlowSupplementalDisclosuresTextBlock": {
     "auth_ref": [
      "r67"
     ],
     "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]",
        "terseLabel": "CASH FLOW INFORMATION"
       }
      }
     },
     "localname": "CashFlowSupplementalDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ClassOfStockDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.",
        "label": "Class Of Stock [Domain]",
        "terseLabel": "Class of Stock [Domain]"
       }
      }
     },
     "localname": "ClassOfStockDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r19",
      "r137",
      "r271",
      "r283"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.",
        "label": "Commitments and Contingencies.",
        "terseLabel": "COMMITMENTS AND CONTINGENCIES (Note 12)"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "COMMITMENTS AND CONTINGENCIES"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r136",
      "r138"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments and Contingencies Disclosure [Text Block]",
        "terseLabel": "COMMITMENTS AND CONTINGENCIES"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCommitmentsAndContingencies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonClassAMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Classification of common stock representing ownership interest in a corporation.",
        "label": "Common Class A [Member]",
        "terseLabel": "Class A common stock"
       }
      }
     },
     "localname": "CommonClassAMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonClassBMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Classification of common stock that has different rights than Common Class A, representing ownership interest in a corporation.",
        "label": "Common Class B [Member]",
        "terseLabel": "Class B common stock"
       }
      }
     },
     "localname": "CommonClassBMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Common Stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock, Par or Stated Value Per Share",
        "terseLabel": "Common stock, par value"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r7"
     ],
     "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",
        "terseLabel": "Common stock, authorized shares"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r7"
     ],
     "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",
        "terseLabel": "Common stock, issued shares"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r7",
      "r147"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common Stock, Shares, Outstanding",
        "terseLabel": "Common stock, outstanding shares"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r7"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 4.0,
       "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"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommonUnitOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of common units of ownership outstanding of a limited liability company (LLC).",
        "label": "Common Unit, Outstanding",
        "terseLabel": "Total common units and common unit equivalents of incentive units outstanding"
       }
      }
     },
     "localname": "CommonUnitOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r29",
      "r31",
      "r32"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "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": "Comprehensive income (loss) attributable to common shareholders"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r29",
      "r31",
      "r204",
      "r205",
      "r213"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest",
        "negatedLabel": "Less: Comprehensive income attributable to noncontrolling interest"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r29",
      "r31",
      "r203",
      "r213"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "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. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest",
        "totalLabel": "Comprehensive income (loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractBasedIntangibleAssetsMember": {
     "auth_ref": [
      "r190"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Right received from contract, including, but not limited to, advertising contract, broadcast rights, franchise agreement, lease agreement, licensing agreement, and use rights.",
        "label": "Contract Based Intangible Assets [Member]",
        "terseLabel": "Management contracts"
       }
      }
     },
     "localname": "ContractBasedIntangibleAssetsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ContractWithCustomerLiability": {
     "auth_ref": [
      "r150",
      "r151",
      "r154"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.",
        "label": "Contract with Customer, Liability",
        "terseLabel": "Deferred revenue"
       }
      }
     },
     "localname": "ContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostsAndExpenses": {
     "auth_ref": [
      "r38"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total costs of sales and operating expenses for the period.",
        "label": "Cost And Expenses",
        "totalLabel": "Total operating expenses"
       }
      }
     },
     "localname": "CostsAndExpenses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CustomerRelationshipsMember": {
     "auth_ref": [
      "r191"
     ],
     "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": "Customer relationships"
       }
      }
     },
     "localname": "CustomerRelationshipsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "CREDIT FACILITY"
       }
      }
     },
     "localname": "DebtDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtDisclosureTextBlock": {
     "auth_ref": [
      "r146"
     ],
     "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]",
        "terseLabel": "CREDIT FACILITY"
       }
      }
     },
     "localname": "DebtDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacility"
     ],
     "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": "Margin (as a percent)"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentCarryingAmount": {
     "auth_ref": [
      "r4",
      "r141",
      "r265",
      "r276"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.",
        "label": "Long-term Debt, Gross",
        "verboseLabel": "Outstanding debt"
       }
      }
     },
     "localname": "DebtInstrumentCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentFaceAmount": {
     "auth_ref": [
      "r248",
      "r250"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face (par) amount of debt instrument at time of issuance.",
        "label": "Debt Instrument, Face Amount",
        "terseLabel": "Borrowings under credit facilities, stated value",
        "verboseLabel": "Face amount of debt"
       }
      }
     },
     "localname": "DebtInstrumentFaceAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentFairValue": {
     "auth_ref": [
      "r244"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.",
        "label": "Debt Instrument, Fair Value Disclosure",
        "terseLabel": "Fair value"
       }
      }
     },
     "localname": "DebtInstrumentFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentUnamortizedDiscount": {
     "auth_ref": [
      "r247",
      "r250"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtLongtermAndShorttermCombinedAmount",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of debt discount.",
        "label": "Debt Instrument, Unamortized Discount",
        "negatedLabel": "Unamortized discount"
       }
      }
     },
     "localname": "DebtInstrumentUnamortizedDiscount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet": {
     "auth_ref": [
      "r142",
      "r249"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unamortized debt discount (premium) and debt issuance costs.",
        "label": "Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net",
        "terseLabel": "Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total"
       }
      }
     },
     "localname": "DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount": {
     "auth_ref": [
      "r18"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.",
        "label": "Debt Instrument, Unused Borrowing Capacity, Amount",
        "terseLabel": "Unused commitment line"
       }
      }
     },
     "localname": "DebtInstrumentUnusedBorrowingCapacityAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtLongtermAndShorttermCombinedAmount": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the aggregate of total long-term debt, including current maturities and short-term debt.",
        "label": "Debt Long-term And Short-term Combined Amount",
        "terseLabel": "Borrowings under credit facilities (stated value of $1,279,188 and $1,293,405 at December 31, 2019 and June 30, 2020, respectively)",
        "totalLabel": "Amount outstanding under credit facility",
        "verboseLabel": "Stated value"
       }
      }
     },
     "localname": "DebtLongtermAndShorttermCombinedAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtWeightedAverageInterestRate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average interest rate of debt outstanding.",
        "label": "Debt, Weighted Average Interest Rate",
        "terseLabel": "Weighted average interest rate"
       }
      }
     },
     "localname": "DebtWeightedAverageInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DeferredFinanceCostsNet": {
     "auth_ref": [
      "r15",
      "r249"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.",
        "label": "Debt Issuance Costs, Net",
        "terseLabel": "Debt financing costs-net",
        "verboseLabel": "Deferred financing costs"
       }
      }
     },
     "localname": "DeferredFinanceCostsNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxAssetsNet": {
     "auth_ref": [
      "r182"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 7.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.",
        "label": "Deferred Income Tax Assets, Net",
        "terseLabel": "Deferred tax assets-net"
       }
      }
     },
     "localname": "DeferredIncomeTaxAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "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 Type [Domain]",
        "terseLabel": "Derivative Contract [Domain]"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r223",
      "r224",
      "r227",
      "r229"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "DERIVATIVES"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r236"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivatives"
     ],
     "xbrltype": "textBlockItemType"
    },
    "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": "Derivatives"
       }
      }
     },
     "localname": "DerivativeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r217",
      "r219"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "Derivative, Notional Amount",
        "terseLabel": "Notional amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeTable": {
     "auth_ref": [
      "r76",
      "r216",
      "r218",
      "r219",
      "r220",
      "r221",
      "r226",
      "r227",
      "r230",
      "r232",
      "r234"
     ],
     "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]"
       }
      }
     },
     "localname": "DerivativeTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "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": "Term of contract"
       }
      }
     },
     "localname": "DerivativeTermOfContract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DerivativeVariableInterestRate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.",
        "label": "Derivative, Variable Interest Rate",
        "verboseLabel": "Interest payable to counterparty (as a percent)"
       }
      }
     },
     "localname": "DerivativeVariableInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DerivativesPolicyTextBlock": {
     "auth_ref": [
      "r68",
      "r77",
      "r216",
      "r218",
      "r220",
      "r221",
      "r231"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for its derivative instruments and hedging activities.",
        "label": "Derivatives, Policy [Policy Text Block]",
        "terseLabel": "Derivatives"
       }
      }
     },
     "localname": "DerivativesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisaggregationOfRevenueLineItems": {
     "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": "Disaggregation of Revenue [Line Items]",
        "terseLabel": "Revenue Recognition"
       }
      }
     },
     "localname": "DisaggregationOfRevenueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DisaggregationOfRevenueTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.",
        "label": "Disaggregation of Revenue [Table]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DisaggregationOfRevenueTableTextBlock": {
     "auth_ref": [
      "r153"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.",
        "label": "Disaggregation of Revenue [Table Text Block]",
        "terseLabel": "Schedule of disaggregated revenues based on the location of the partner firm"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DueToRelatedPartiesCurrentAndNoncurrent": {
     "auth_ref": [
      "r75",
      "r256",
      "r268",
      "r285"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 6.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of obligations due all related parties.",
        "label": "Due to Related Parties",
        "terseLabel": "Due to affiliates"
       }
      }
     },
     "localname": "DueToRelatedPartiesCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "LOSS PER SHARE",
        "terseLabel": "Income (loss) per share of Class A common stock:"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r36",
      "r79",
      "r83",
      "r86",
      "r87",
      "r88",
      "r91",
      "r275",
      "r288"
     ],
     "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",
        "verboseLabel": "Basic income (loss) per share"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareBasicAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Earnings Per Share, Basic [Abstract]",
        "terseLabel": "Basic income (loss) per share:"
       }
      }
     },
     "localname": "EarningsPerShareBasicAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasicLineItems": {
     "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": "Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]",
        "terseLabel": "LOSS PER SHARE"
       }
      }
     },
     "localname": "EarningsPerShareBasicLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r36",
      "r79",
      "r83",
      "r86",
      "r87",
      "r88",
      "r91",
      "r275",
      "r288"
     ],
     "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",
        "verboseLabel": "Diluted income (loss) per share"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDilutedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Earnings Per Share, Diluted [Abstract]",
        "terseLabel": "Diluted income (loss) per share:"
       }
      }
     },
     "localname": "EarningsPerShareDilutedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r246"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts 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": "Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "terseLabel": "EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateContinuingOperations": {
     "auth_ref": [
      "r74",
      "r180",
      "r181"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Effective Income Tax Rate Reconciliation, Percent",
        "terseLabel": "Effective income tax rate (as a percent)"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureIncomeTaxesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EmployeeStockOptionMember": {
     "auth_ref": [
      "r174"
     ],
     "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": "Employee Stock Option [Member]",
        "terseLabel": "Stock options"
       }
      }
     },
     "localname": "EmployeeStockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "EQUITY"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r147"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentDividendsOrDistributions": {
     "auth_ref": [
      "r34",
      "r54",
      "r59",
      "r286"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.",
        "label": "Proceeds from Equity Method Investment, Distribution",
        "terseLabel": "Distributions received from equity method investments"
       }
      }
     },
     "localname": "EquityMethodInvestmentDividendsOrDistributions",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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": "Inputs used in the fair value measurement of estimated contingent consideration"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r239"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": {
     "auth_ref": [
      "r239"
     ],
     "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": "Schedule of inputs used in the fair value measurement of estimated contingent consideration"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": {
     "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, Balance Sheet Grouping, Financial Statement Captions [Line Items]",
        "terseLabel": "Implied fair value based on level 2 inputs"
       }
      }
     },
     "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTextBlock": {
     "auth_ref": [
      "r237",
      "r245"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.",
        "label": "Fair Value, by Balance Sheet Grouping [Table Text Block]",
        "terseLabel": "Schedule of implied fair value of the Company's First Lien Term Loan (as defined below)"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r157",
      "r158",
      "r159",
      "r238",
      "r260"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "FAIR VALUE MEASUREMENTS"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r242"
     ],
     "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]",
        "terseLabel": "FAIR VALUE MEASUREMENTS"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r157",
      "r158",
      "r159",
      "r238",
      "r261"
     ],
     "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 Level3 [Member]",
        "terseLabel": "Level 3"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": {
     "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, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]",
        "terseLabel": "Changes in the fair value of estimated contingent consideration for business acquisitions"
       }
      }
     },
     "localname": "FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": {
     "auth_ref": [
      "r241",
      "r243"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes 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 liability.",
        "label": "Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]",
        "terseLabel": "Schedule of changes in the fair value of estimated contingent consideration for business acquisitions"
       }
      }
     },
     "localname": "FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Measurements Fair Value Hierarchy [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinanceLeasePrincipalPayments": {
     "auth_ref": [
      "r253",
      "r254"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for principal payment on finance lease.",
        "label": "Finance Lease, Principal Payments",
        "negatedLabel": "Payments on finance lease obligations"
       }
      }
     },
     "localname": "FinanceLeasePrincipalPayments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization": {
     "auth_ref": [
      "r130"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails": {
       "order": 1.0,
       "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",
        "negatedLabel": "Accumulated Amortization"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAccumulatedAmortization",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable": {
     "auth_ref": [
      "r125"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A table containing detailed characteristics of finite-lived intangible assets acquired during a business combination. Finite-lived intangible assets are assets that have no physical form, but have expected future economic benefit, and are expected to be used over a defined period. Acquired finite-lived intangible assets are disclosed by major class (assets that can be grouped together because they are similar, either by their nature or by their use in operations of the Entity) and in total. Additionally, any significant residual value (the expected value of the asset at the end of its useful life) and the weighted-average amortization period are also disclosed.",
        "label": "Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": {
     "auth_ref": [
      "r125",
      "r127",
      "r130",
      "r132",
      "r262"
     ],
     "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]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsGross": {
     "auth_ref": [
      "r130",
      "r262"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails": {
       "order": 2.0,
       "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": "Gross Carry Amount"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": {
     "auth_ref": [
      "r125",
      "r129"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsNet": {
     "auth_ref": [
      "r130"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails": {
       "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": "Net Book Value"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainsLossesOnExtinguishmentOfDebt": {
     "auth_ref": [
      "r59",
      "r144",
      "r145"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 3.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.",
        "label": "Gain (Loss) on Extinguishment of Debt",
        "terseLabel": "Loss on extinguishment of borrowings"
       }
      }
     },
     "localname": "GainsLossesOnExtinguishmentOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Goodwill": {
     "auth_ref": [
      "r115",
      "r116"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
       "weight": 1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 2.0,
       "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": "Balance end of period",
        "periodStartLabel": "Balance beginning of period",
        "terseLabel": "Goodwill"
       }
      }
     },
     "localname": "Goodwill",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAcquiredDuringPeriod": {
     "auth_ref": [
      "r118"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_GoodwillPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "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": "Goodwill acquired"
       }
      }
     },
     "localname": "GoodwillAcquiredDuringPeriod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "GOODWILL AND OTHER INTANGIBLE ASSETS"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r133"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for goodwill and intangible assets.",
        "label": "Goodwill and Intangible Assets Disclosure [Text Block]",
        "terseLabel": "GOODWILL AND OTHER INTANGIBLE ASSETS"
       }
      }
     },
     "localname": "GoodwillAndIntangibleAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssets"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GoodwillGross": {
     "auth_ref": [
      "r117",
      "r120"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before 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, Gross",
        "periodEndLabel": "Goodwill end of period",
        "periodStartLabel": "Goodwill beginning of period"
       }
      }
     },
     "localname": "GoodwillGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillImpairedAccumulatedImpairmentLoss": {
     "auth_ref": [
      "r117",
      "r120"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated impairment loss for 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, Impaired, Accumulated Impairment Loss",
        "negatedPeriodEndLabel": "Cumulative impairment losses end of period",
        "negatedPeriodStartLabel": "Cumulative impairment losses beginning of period"
       }
      }
     },
     "localname": "GoodwillImpairedAccumulatedImpairmentLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillOtherIncreaseDecrease": {
     "auth_ref": [
      "r119"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_GoodwillPeriodIncreaseDecrease",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill, Other Increase (Decrease)",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "GoodwillOtherIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillPeriodIncreaseDecrease": {
     "auth_ref": [
      "r121"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) 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, Period Increase (Decrease)",
        "totalLabel": "Goodwill period increase (decrease)"
       }
      }
     },
     "localname": "GoodwillPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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": "Change in the goodwill"
       }
      }
     },
     "localname": "GoodwillRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsChangeInGoodwillDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r33",
      "r79",
      "r263",
      "r273",
      "r289"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "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 TAX"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromEquityMethodInvestments": {
     "auth_ref": [
      "r34",
      "r59",
      "r100",
      "r110",
      "r272",
      "r286"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (loss) for proportionate share of equity method investee's income (loss).",
        "label": "Income (Loss) from Equity Method Investments",
        "negatedLabel": "Income from equity method investments",
        "terseLabel": "Income from equity method investments"
       }
      }
     },
     "localname": "IncomeLossFromEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Unaudited Condensed Consolidated Statements of Operations"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "INCOME TAXES"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r184"
     ],
     "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]",
        "terseLabel": "INCOME TAXES"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureIncomeTaxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r71",
      "r101",
      "r183"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_ProfitLoss",
       "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 EXPENSE"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaidNet": {
     "auth_ref": [
      "r62"
     ],
     "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",
        "verboseLabel": "Income taxes"
       }
      }
     },
     "localname": "IncomeTaxesPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayable": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.",
        "label": "Increase (Decrease) in Accounts Payable",
        "terseLabel": "Accounts payable"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsReceivable": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.",
        "label": "Increase (Decrease) in Accounts Receivable",
        "negatedLabel": "Accounts receivable"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccruedLiabilities": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.",
        "label": "Increase (Decrease) in Accrued Liabilities",
        "terseLabel": "Accrued expenses"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInContractWithCustomerLiability": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.",
        "label": "Increase (Decrease) in Contract with Customer, Liability",
        "terseLabel": "Deferred revenue"
       }
      }
     },
     "localname": "IncreaseDecreaseInContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInDueToAffiliates": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) in obligations owed to an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.",
        "label": "Increase (Decrease) in Due to Affiliates",
        "terseLabel": "Due to affiliates"
       }
      }
     },
     "localname": "IncreaseDecreaseInDueToAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Increase (Decrease) in Operating Capital [Abstract]",
        "terseLabel": "Changes in cash resulting from changes in operating assets and liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingLiabilities": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in operating liabilities classified as other.",
        "label": "Increase (Decrease) in Other Operating Liabilities",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in prepaid expenses, and assets classified as other.",
        "label": "Increase (Decrease) in Prepaid Expense and Other Assets",
        "negatedLabel": "Prepaid expenses and other assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "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 shareholders' equity"
       }
      }
     },
     "localname": "IncreaseDecreaseInStockholdersEquityRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IntangibleAssetsNetExcludingGoodwill": {
     "auth_ref": [
      "r123",
      "r128"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 1.0,
       "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": "Other intangible assets-net"
       }
      }
     },
     "localname": "IntangibleAssetsNetExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseDebt": {
     "auth_ref": [
      "r43",
      "r143"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 5.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense for debt.",
        "label": "Interest Expense, Debt",
        "negatedLabel": "Interest expense"
       }
      }
     },
     "localname": "InterestExpenseDebt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r52",
      "r56",
      "r62"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateCashFlowHedgeDerivativeAtFairValueNet": {
     "auth_ref": [
      "r215"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.",
        "label": "Interest Rate Cash Flow Hedge Derivative at Fair Value, Net",
        "verboseLabel": "Fair value of interest rate swap"
       }
      }
     },
     "localname": "InterestRateCashFlowHedgeDerivativeAtFairValueNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateFloorMember": {
     "auth_ref": [
      "r228"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts in which the floor writer, in return for a premium, agrees to limit the risk associated with a decline in interest rates based on a notional amount. If rates fall below an agreed rate, the floor holder will receive cash payments from the floor writer equal to the difference between the market rate and an agreed rate multiplied by the notional principal amount.",
        "label": "Interest Rate Floor [Member]",
        "terseLabel": "Floor"
       }
      }
     },
     "localname": "InterestRateFloorMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateSwapMember": {
     "auth_ref": [
      "r228"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.",
        "label": "Interest Rate Swap [Member]",
        "terseLabel": "Interest rate swap"
       }
      }
     },
     "localname": "InterestRateSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentIncomeInterest": {
     "auth_ref": [
      "r42",
      "r99"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 6.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.",
        "label": "Investment Income, Interest",
        "terseLabel": "Interest income"
       }
      }
     },
     "localname": "InvestmentIncomeInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentInterestRate": {
     "auth_ref": [
      "r108",
      "r109"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Rate of interest on investment.",
        "label": "Investment Interest Rate",
        "verboseLabel": "Interest received from counterparty (as a percent)"
       }
      }
     },
     "localname": "InvestmentInterestRate",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LaborAndRelatedExpense": {
     "auth_ref": [
      "r37"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.",
        "label": "Labor And Related Expense",
        "terseLabel": "Compensation and related expenses"
       }
      }
     },
     "localname": "LaborAndRelatedExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LettersOfCreditOutstandingAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.",
        "label": "Letters of Credit Outstanding, Amount",
        "terseLabel": "Letter of credit outstanding"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r17"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities [Abstract]",
        "terseLabel": "LIABILITIES"
       }
      }
     },
     "localname": "LiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r13",
      "r267",
      "r281"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "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 EQUITY"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "terseLabel": "LIABILITIES AND EQUITY"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityInterestRateDuringPeriod": {
     "auth_ref": [
      "r16"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The effective interest rate during the reporting period.",
        "label": "Line of Credit Facility, Interest Rate During Period",
        "terseLabel": "Annual interest rate"
       }
      }
     },
     "localname": "LineOfCreditFacilityInterestRateDuringPeriod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LineOfCreditFacilityLineItems": {
     "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": "Line of Credit Facility [Line Items]",
        "terseLabel": "Credit Facility"
       }
      }
     },
     "localname": "LineOfCreditFacilityLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": {
     "auth_ref": [
      "r16"
     ],
     "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": "Maximum borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityMaximumBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityPeriodicPayment": {
     "auth_ref": [
      "r16"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the required periodic payments of both interest and principal.",
        "label": "Line of Credit Facility, Periodic Payment",
        "terseLabel": "Quarterly installment repayments"
       }
      }
     },
     "localname": "LineOfCreditFacilityPeriodicPayment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityTable": {
     "auth_ref": [
      "r16",
      "r72"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A table or schedule providing information pertaining to short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to 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.",
        "label": "Line of Credit Facility [Table]"
       }
      }
     },
     "localname": "LineOfCreditFacilityTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsImpliedFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.",
        "label": "Line of Credit Facility, Unused Capacity, Commitment Fee Percentage",
        "terseLabel": "Unused commitment fee (as a percent)"
       }
      }
     },
     "localname": "LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "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": "Credit Facility"
       }
      }
     },
     "localname": "LineOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails"
     ],
     "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 L I B O R [Member]",
        "terseLabel": "LIBOR"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBORMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LossContingencyLossInPeriod": {
     "auth_ref": [
      "r137"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.",
        "label": "Loss Contingency, Loss in Period",
        "terseLabel": "Liabilities, clearing brokers"
       }
      }
     },
     "localname": "LossContingencyLossInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCommitmentsAndContingenciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ManagementFeeExpense": {
     "auth_ref": [
      "r257"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expenses related to the managing member or general partner for management of the day-to-day business functions of the limited liability company (LLC) or limited partnership (LP).",
        "label": "Management Fee Expense",
        "terseLabel": "Management contract buyout expense"
       }
      }
     },
     "localname": "ManagementFeeExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureOtherDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MeasurementInputInceptionDiscountRateMember": {
     "auth_ref": [
      "r239"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using interest rate at inception of contract to determine present value of future cash flows.",
        "label": "Measurement Input Inception Discount Rate [Member]",
        "terseLabel": "Discount Rates"
       }
      }
     },
     "localname": "MeasurementInputInceptionDiscountRateMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputLongTermRevenueGrowthRateMember": {
     "auth_ref": [
      "r239"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using compounded annualized rate of long-term growth in revenue.",
        "label": "Measurement Input Long Term Revenue Growth Rate [Member]",
        "terseLabel": "Forecasted growth rates"
       }
      }
     },
     "localname": "MeasurementInputLongTermRevenueGrowthRateMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputTypeAxis": {
     "auth_ref": [
      "r239"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Axis]"
       }
      }
     },
     "localname": "MeasurementInputTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsContingentConsiderationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r21",
      "r266",
      "r280"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "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 is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).",
        "label": "Stockholders' Equity Attributable to Noncontrolling Interest",
        "terseLabel": "Non-controlling interest"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.",
        "label": "Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners",
        "terseLabel": "Non-controlling interest allocation"
       }
      }
     },
     "localname": "MinorityInterestOwnershipPercentageByNoncontrollingOwners",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_MinorityInterestOwnershipPercentageByParent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The parent entity's interest in net assets of the subsidiary, expressed as a percentage.",
        "label": "Noncontrolling Interest, Ownership Percentage by Parent",
        "terseLabel": "Company's interest in Focus LLC"
       }
      }
     },
     "localname": "MinorityInterestOwnershipPercentageByParent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r55"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "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 ins) financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r55"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 3.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "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 investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r55",
      "r57",
      "r60"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r28",
      "r30",
      "r35",
      "r60",
      "r90",
      "r274",
      "r287"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "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 (loss) attributable to common shareholders",
        "totalLabel": "NET INCOME (LOSS ) ATTRIBUTABLE TO COMMON SHAREHOLDERS"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Income (Loss) Attributable to Parent [Abstract]",
        "terseLabel": "Net income (loss) attributable to common stockholders"
       }
      }
     },
     "localname": "NetIncomeLossAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r28",
      "r30",
      "r207",
      "r212"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.",
        "label": "Net Income (Loss) Attributable to Noncontrolling Interest",
        "negatedLabel": "Non-controlling interest"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": {
     "auth_ref": [
      "r79",
      "r81"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.",
        "label": "Net Income (Loss) Available to Common Stockholders, Basic",
        "terseLabel": "Net income (loss) attributable to common shareholders"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersBasic",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted": {
     "auth_ref": [
      "r81",
      "r82"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.",
        "label": "Net income attributable to common shareholders",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersDiluted",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "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]",
        "terseLabel": "Recent Accounting Pronouncements"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NonUsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Countries excluding the United States of America (US).",
        "label": "Non Us [Member]",
        "terseLabel": "International revenue"
       }
      }
     },
     "localname": "NonUsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1": {
     "auth_ref": [
      "r63",
      "r64",
      "r65"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions 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. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future.",
        "label": "Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)",
        "terseLabel": "Net tangible assets (liabilities) acquired in connection with business acquisitions"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r201"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.",
        "label": "Noncontrolling Interest [Member]",
        "terseLabel": "Non-controlling Interest"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NonoperatingIncomeExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Nonoperating Income (Expense) [Abstract]",
        "terseLabel": "OTHER INCOME (EXPENSE):"
       }
      }
     },
     "localname": "NonoperatingIncomeExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NumberOfBusinessesAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of businesses acquired by the entity during the period.",
        "label": "Number of Businesses Acquired",
        "terseLabel": "Number of business acquisitions closed",
        "verboseLabel": "Number of business acquisitions"
       }
      }
     },
     "localname": "NumberOfBusinessesAcquired",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OperatingExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Operating Expenses [Abstract]",
        "terseLabel": "OPERATING EXPENSES:"
       }
      }
     },
     "localname": "OperatingExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net result for the period of deducting operating expenses from operating revenues.",
        "label": "Operating Income (Loss)",
        "totalLabel": "INCOME FROM OPERATIONS"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r252"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "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": "Operating lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r251"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 6.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "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": "Operating lease assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "GENERAL"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock": {
     "auth_ref": [
      "r0",
      "r214"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.",
        "label": "Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]",
        "verboseLabel": "GENERAL"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGeneral"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent": {
     "auth_ref": [
      "r203",
      "r204",
      "r209"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.",
        "label": "Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent",
        "terseLabel": "Foreign currency translation adjustments",
        "verboseLabel": "Currency translation adjustment - net of tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent": {
     "auth_ref": [
      "r24"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.",
        "label": "Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent",
        "negatedLabel": "Unrealized loss on interest rate swap designated as a cash flow hedge"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]",
        "terseLabel": "Other comprehensive income (loss), net of tax:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherDepreciationAndAmortization": {
     "auth_ref": [
      "r40",
      "r59",
      "r134"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 15.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense charged against earnings to allocate the cost of tangible and intangible assets over their remaining economic lives, classified as other.",
        "label": "Other Depreciation and Amortization",
        "verboseLabel": "Depreciation and other amortization"
       }
      }
     },
     "localname": "OtherDepreciationAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherIntangibleAssetsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Intangible assets classified as other.",
        "label": "Other Intangible Assets [Member]",
        "terseLabel": "Other intangibles"
       }
      }
     },
     "localname": "OtherIntangibleAssetsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r270"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "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"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesMember": {
     "auth_ref": [
      "r222",
      "r233"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpense": {
     "auth_ref": [
      "r44"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 2.0,
       "parentTag": "focs_NonOperatingIncomeExpenseAndOtherExpenseNet",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.",
        "label": "Other Nonoperating Income (Expense)",
        "terseLabel": "Other (expense) income-net"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ParentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portion of equity, or net assets, in the consolidated entity attributable, directly or indirectly, to the parent. Excludes noncontrolling interests.",
        "label": "Parent [Member]",
        "terseLabel": "Total Shareholders' Equity"
       }
      }
     },
     "localname": "ParentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities": {
     "auth_ref": [
      "r51"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.",
        "label": "Payment for Contingent Consideration Liability, Financing Activities",
        "negatedLabel": "Contingent consideration paid"
       }
      }
     },
     "localname": "PaymentForContingentConsiderationLiabilityFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDebtIssuanceCosts": {
     "auth_ref": [
      "r50"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.",
        "label": "Payments of Debt Issuance Costs",
        "negatedLabel": "Payments of debt financing costs",
        "terseLabel": "Debt issuance costs"
       }
      }
     },
     "localname": "PaymentsOfDebtIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireBusinessesGross": {
     "auth_ref": [
      "r45",
      "r197"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_BusinessCombinationConsiderationTransferred1",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.",
        "label": "Payments to Acquire Businesses, Gross",
        "terseLabel": "Cash due at closing",
        "verboseLabel": "Purchase consideration for asset acquisitions"
       }
      }
     },
     "localname": "PaymentsToAcquireBusinessesGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired": {
     "auth_ref": [
      "r45"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 2.0,
       "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": "Cash paid for acquisitions and contingent consideration-net of cash acquired"
       }
      }
     },
     "localname": "PaymentsToAcquireBusinessesNetOfCashAcquired",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r46"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.",
        "label": "Payments to Acquire Property, Plant, and Equipment",
        "negatedLabel": "Purchase of fixed assets"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrepaidExpenseAndOtherAssets": {
     "auth_ref": [],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.",
        "label": "Prepaid Expense and Other Assets",
        "terseLabel": "Prepaid expenses and other assets"
       }
      }
     },
     "localname": "PrepaidExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLinesOfCredit": {
     "auth_ref": [
      "r48",
      "r73"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 7.0,
       "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": "Borrowings under credit facilities"
       }
      }
     },
     "localname": "ProceedsFromLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromStockOptionsExercised": {
     "auth_ref": [
      "r47",
      "r177"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 3.0,
       "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",
        "terseLabel": "Proceeds from exercise of stock options"
       }
      }
     },
     "localname": "ProceedsFromStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r28",
      "r30",
      "r53",
      "r102",
      "r103",
      "r203",
      "r206",
      "r208",
      "r212",
      "r213"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 17.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss": {
       "order": 3.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      },
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.",
        "label": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest",
        "totalLabel": "NET INCOME",
        "verboseLabel": "Net income"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveIncomeLoss",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r2",
      "r3",
      "r135",
      "r282"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "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",
        "terseLabel": "Fixed assets-net"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty": {
     "auth_ref": [
      "r255"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.",
        "label": "Related Party Transaction, Expenses from Transactions with Related Party",
        "terseLabel": "Expenses recognized"
       }
      }
     },
     "localname": "RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureRelatedPartiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "RELATED PARTIES"
       }
      }
     },
     "localname": "RelatedPartyTransactionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": {
     "auth_ref": [
      "r258"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Related Party Transactions Disclosure [Text Block]",
        "terseLabel": "RELATED PARTIES"
       }
      }
     },
     "localname": "RelatedPartyTransactionsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureRelatedParties"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RepaymentsOfDebt": {
     "auth_ref": [
      "r49"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.",
        "label": "Repayments Of Debt",
        "negatedLabel": "Repayments of borrowings under credit facilities"
       }
      }
     },
     "localname": "RepaymentsOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "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 R S U [Member]",
        "terseLabel": "Restricted Stock Units (RSUs)"
       }
      }
     },
     "localname": "RestrictedStockUnitsRSUMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r10",
      "r148",
      "r279"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 2.0,
       "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 (deficit)"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Retained Earnings (Deficit)"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r152",
      "r153"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.",
        "label": "Revenue from Contract with Customer, Excluding Assessed Tax",
        "verboseLabel": "Total revenues"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesRevenueDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueRecognitionPolicyTextBlock": {
     "auth_ref": [
      "r69",
      "r70"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.",
        "label": "Revenue Recognition, Policy [Policy Text Block]",
        "verboseLabel": "Revenue"
       }
      }
     },
     "localname": "RevenueRecognitionPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revenues [Abstract]",
        "terseLabel": "REVENUES:"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": {
     "auth_ref": [
      "r186",
      "r187"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.",
        "label": "Schedule of Business Acquisitions, by Acquisition [Table]"
       }
      }
     },
     "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable": {
     "auth_ref": [
      "r83",
      "r84",
      "r88",
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The table contains disclosure pertaining to an entity's basic earnings per share.",
        "label": "Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicByCommonClassTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTextBlock": {
     "auth_ref": [
      "r83",
      "r84",
      "r88",
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the effect of income (loss) on basic earnings per share.",
        "label": "Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block]",
        "terseLabel": "Schedule of calculation of basic earnings per share"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicByCommonClassTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestsAndIncomeLossPerShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock": {
     "auth_ref": [
      "r39",
      "r83",
      "r84",
      "r85",
      "r88",
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.",
        "label": "Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block]",
        "terseLabel": "Schedule of calculation of diluted earnings per share"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestsAndIncomeLossPerShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock": {
     "auth_ref": [
      "r125"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of finite-lived intangible assets acquired as part of a business combination or through an asset purchase, by major class and in total, including the value of the asset acquired, any significant residual value (the expected value of the asset at the end of its useful life) and the weighted-average amortization period.",
        "label": "Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]",
        "terseLabel": "Schedule of weighted-average useful lives of intangible assets acquired"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable": {
     "auth_ref": [
      "r125",
      "r129"
     ],
     "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]"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfGoodwillTextBlock": {
     "auth_ref": [
      "r121",
      "r122"
     ],
     "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": "Summary of changes in the goodwill balances"
       }
      }
     },
     "localname": "ScheduleOfGoodwillTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock": {
     "auth_ref": [
      "r121"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class.",
        "label": "Schedule of Intangible Assets and Goodwill [Table Text Block]",
        "terseLabel": "Summary of amortizing acquired intangible assets"
       }
      }
     },
     "localname": "ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureGoodwillAndOtherIntangibleAssetsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock": {
     "auth_ref": [
      "r16",
      "r72"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to 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.",
        "label": "Schedule of Line of Credit Facilities [Table Text Block]",
        "terseLabel": "Schedule of reconciliation of principal amounts outstanding under the Credit Facility to borrowings under credit facilities recorded in the unaudited condensed consolidated balance sheet"
       }
      }
     },
     "localname": "ScheduleOfLineOfCreditFacilitiesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock": {
     "auth_ref": [
      "r171"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the changes in outstanding nonvested restricted stock units.",
        "label": "Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]",
        "verboseLabel": "Schedule of changes in restricted stock units"
       }
      }
     },
     "localname": "ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": {
     "auth_ref": [
      "r162",
      "r176"
     ],
     "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]"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock": {
     "auth_ref": [
      "r176"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.",
        "label": "Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]",
        "terseLabel": "Schedule of incentive units outstanding and vested by hurdle rates"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock": {
     "auth_ref": [
      "r165"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year.",
        "label": "Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]",
        "terseLabel": "Schedule of stock options granted"
       }
      }
     },
     "localname": "ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SellingGeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r41",
      "r114"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations": {
       "order": 3.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.",
        "label": "Selling, General and Administrative Expense",
        "terseLabel": "Selling, general and administrative"
       }
      }
     },
     "localname": "SellingGeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember": {
     "auth_ref": [
      "r187"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the aggregation and reporting of combined amounts of individually immaterial business combinations that were completed during the period.",
        "label": "Series Of Individually Immaterial Business Acquisitions [Member]",
        "terseLabel": "Business acquisitions"
       }
      }
     },
     "localname": "SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsBusinessAcquisitionsDetails",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows": {
       "order": 13.0,
       "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 Compensation",
        "terseLabel": "Non-cash equity compensation expense"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": {
     "auth_ref": [
      "r163"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": {
     "auth_ref": [
      "r172"
     ],
     "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",
        "terseLabel": "Forfeited"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "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": "Weighted Average Hurdle Price"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "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]",
        "terseLabel": "Fair value of the stock option grants determined with assumptions"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "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]",
        "verboseLabel": "EQUITY"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures": {
     "auth_ref": [
      "r170"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures",
        "negatedLabel": "Forfeited"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber": {
     "auth_ref": [
      "r166",
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of equity instruments other than options outstanding, including both vested and non-vested instruments.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number",
        "periodEndLabel": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward": {
     "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, Non-Option Equity Instruments, Outstanding [Roll Forward]",
        "terseLabel": "Incentive Units"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": {
     "auth_ref": [
      "r170"
     ],
     "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": "Forfeited"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": {
     "auth_ref": [
      "r167",
      "r176"
     ],
     "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": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "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": "Changes in stock options"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": {
     "auth_ref": [
      "r166"
     ],
     "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": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "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": "Changes in stock option, Weighted Average Exercise Price"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": {
     "auth_ref": [
      "r160",
      "r164"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Award under share-based payment arrangement.",
        "label": "Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]",
        "terseLabel": "Equity Award [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails"
     ],
     "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",
        "terseLabel": "Exercised"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "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",
        "terseLabel": "Forfeited"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis": {
     "auth_ref": [
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by range of option prices pertaining to options granted.",
        "label": "Exercise Price Range [Axis]"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain": {
     "auth_ref": [
      "r174"
     ],
     "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": "Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Domain]",
        "terseLabel": "Exercise Price Range [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityFocusLlcIncentiveUnitDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of non-vested options outstanding.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares",
        "periodEndLabel": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward": {
     "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, Nonvested, Number of Shares [Roll Forward]",
        "terseLabel": "Changes in unvested common stock"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of non-vested options forfeited.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares",
        "negatedLabel": "Forfeited"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average grant-date fair value of non-vested options forfeited.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value",
        "terseLabel": "Forfeited"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average grant-date fair value of non-vested options outstanding.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price",
        "periodEndLabel": "Outstanding at the end of the period",
        "periodStartLabel": "Outstanding at the beginning of the period"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]",
        "terseLabel": "Changes in unvested common stock, Grant Date Fair Value"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "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",
        "negatedLabel": "Vested",
        "terseLabel": "Vested"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average grant-date fair value of options vested.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value",
        "terseLabel": "Vested"
       }
      }
     },
     "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock": {
     "auth_ref": [
      "r149",
      "r179"
     ],
     "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]",
        "terseLabel": "EQUITY"
       }
      }
     },
     "localname": "ShareholdersEquityAndShareBasedPaymentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquity"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares issued which are neither cancelled nor held in the treasury.",
        "label": "Shares, Outstanding",
        "periodEndLabel": "Ending Balance (in shares)",
        "periodStartLabel": "Beginning balance (in shares)"
       }
      }
     },
     "localname": "SharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r78"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.",
        "label": "Significant Accounting Policies [Text Block]",
        "verboseLabel": "SUMMARY OF ACCOUNTING POLICIES"
       }
      }
     },
     "localname": "SignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StandbyLettersOfCreditMember": {
     "auth_ref": [
      "r139",
      "r140",
      "r200",
      "r293"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "An irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation.",
        "label": "Standby Letters Of Credit [Member]",
        "terseLabel": "Letter of credit"
       }
      }
     },
     "localname": "StandbyLettersOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityFirstLienRevolverAndLettersOfCreditDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StatementClassOfStockAxis": {
     "auth_ref": [
      "r5",
      "r6",
      "r7",
      "r147"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by the different classes of stock of the entity.",
        "label": "Class of Stock [Axis]"
       }
      }
     },
     "localname": "StatementClassOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r20",
      "r147"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "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]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Unaudited Condensed Consolidated Statements of Cash Flows"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Unaudited Condensed Consolidated Balance Sheets"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Unaudited Condensed Consolidated Statements of Changes in Members' Deficit/Shareholders' Equity"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [],
     "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]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityTables",
      "http://focusfinancialpartners.com/role/DisclosureFairValueMeasurementsChangesInFairValueDetails",
      "http://focusfinancialpartners.com/role/DocumentDocumentAndEntityInformation",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r6",
      "r7",
      "r147",
      "r148"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of new stock issued during the period.",
        "label": "Stock Issued During Period, Shares, New Issues",
        "terseLabel": "Issuance of common stock (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": {
     "auth_ref": [
      "r6",
      "r7",
      "r147",
      "r148",
      "r169"
     ],
     "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": "Exercised"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureEquityDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": {
     "auth_ref": [
      "r20",
      "r147",
      "r148"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock issued as a result of the exercise of stock options.",
        "label": "Stock Issued During Period, Value, Stock Options Exercised",
        "terseLabel": "Issuance (cancellation) of common stock in connection with exercise of Focus LLC common unit exchange rights"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r7",
      "r11",
      "r12",
      "r107"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "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",
        "totalLabel": "Total shareholders' equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r201",
      "r202",
      "r211"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.",
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance",
        "totalLabel": "Total equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInMembersDeficitShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]",
        "terseLabel": "EQUITY"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event [Member]",
        "terseLabel": "Subsequent Events"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r259"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Axis]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r259"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Domain]",
        "terseLabel": "Subsequent Event Type [Domain]"
       }
      }
     },
     "localname": "SubsequentEventTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureAcquisitionsAssetAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SupplementalCashFlowElementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "CASH FLOW INFORMATION"
       }
      }
     },
     "localname": "SupplementalCashFlowElementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Supplemental Cash Flow Information [Abstract]",
        "terseLabel": "Supplemental disclosures of cash flow information-cash paid for:"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCashFlowInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_UnamortizedDebtIssuanceExpense": {
     "auth_ref": [
      "r15"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtLongtermAndShorttermCombinedAmount",
       "weight": -1.0
      }
     },
     "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",
        "negatedLabel": "Unamortized debt financing costs"
       }
      }
     },
     "localname": "UnamortizedDebtIssuanceExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityReconciliationOfPrincipalAmountsOutstandingDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r92",
      "r93",
      "r94",
      "r95",
      "r96",
      "r97",
      "r98"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureSummaryOfAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "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/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails",
      "http://focusfinancialpartners.com/role/DisclosureDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r82",
      "r88"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "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",
        "totalLabel": "Total",
        "verboseLabel": "Weighted average shares of Class A common stock outstanding"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Weighted Average Number of Shares Outstanding, Diluted [Abstract]",
        "terseLabel": "Weighted average shares of Class A common stock outstanding:"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r80",
      "r88"
     ],
     "calculation": {
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails": {
       "order": 1.0,
       "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",
        "verboseLabel": "Weighted average shares of Class A common stock outstanding"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureNonControllingInterestAndIncomeLossPerShareDetails",
      "http://focusfinancialpartners.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WriteOffOfDeferredDebtIssuanceCost": {
     "auth_ref": [
      "r43"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.",
        "label": "Write off of Deferred Debt Issuance Cost",
        "terseLabel": "Write-off of debt issuance cost"
       }
      }
     },
     "localname": "WriteOffOfDeferredDebtIssuanceCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://focusfinancialpartners.com/role/DisclosureCreditFacilityOldAndNewCreditFacilityDetails"
     ],
     "xbrltype": "monetaryItemType"
    }
   },
   "unitCount": 6
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "205",
   "URI": "http://asc.fasb.org/topic&trid=2122149"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765"
  },
  "r10": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524"
  },
  "r107": {
   "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"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563"
  },
  "r11": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "10",
   "Topic": "330",
   "URI": "http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311"
  },
  "r115": {
   "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"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r12": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267"
  },
  "r123": {
   "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"
  },
  "r124": {
   "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"
  },
  "r125": {
   "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"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(3)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r127": {
   "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"
  },
  "r128": {
   "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"
  },
  "r129": {
   "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"
  },
  "r13": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r130": {
   "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"
  },
  "r131": {
   "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"
  },
  "r132": {
   "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"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "350",
   "URI": "http://asc.fasb.org/topic&trid=2144416"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r135": {
   "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"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=118943654&loc=d3e12021-110248"
  },
  "r14": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=118956092&loc=d3e12803-110250"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "50",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "50",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "470",
   "URI": "http://asc.fasb.org/topic&trid=2208564"
  },
  "r147": {
   "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"
  },
  "r148": {
   "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=27012166&loc=d3e187085-122770"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r15": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046"
  },
  "r157": {
   "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"
  },
  "r158": {
   "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"
  },
  "r159": {
   "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"
  },
  "r16": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r166": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r167": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(ii)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r169": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r17": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r170": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r172": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r175": {
   "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=116856206&loc=d3e5070-113901"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901"
  },
  "r178": {
   "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"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "718",
   "URI": "http://asc.fasb.org/topic&trid=2228938"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r180": {
   "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"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319"
  },
  "r182": {
   "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"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r186": {
   "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"
  },
  "r187": {
   "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"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "37",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472"
  },
  "r19": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5227-128473"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5333-128473"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476"
  },
  "r193": {
   "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"
  },
  "r194": {
   "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"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "805",
   "URI": "http://asc.fasb.org/topic&trid=2303972"
  },
  "r2": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r20": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116873149&loc=d3e923-111674"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683"
  },
  "r203": {
   "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"
  },
  "r204": {
   "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"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4613674-111683"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r209": {
   "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"
  },
  "r21": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r210": {
   "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"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4590271-111686"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "810",
   "URI": "http://asc.fasb.org/topic&trid=2197479"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41675-113959"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "182",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=116861445&loc=SL5629052-113961"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "25",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80784-113994"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "815",
   "URI": "http://asc.fasb.org/topic&trid=2229140"
  },
  "r237": {
   "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"
  },
  "r238": {
   "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"
  },
  "r239": {
   "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"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580"
  },
  "r240": {
   "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"
  },
  "r241": {
   "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"
  },
  "r242": {
   "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"
  },
  "r243": {
   "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"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611"
  },
  "r246": {
   "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"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580"
  },
  "r250": {
   "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"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "850",
   "URI": "http://asc.fasb.org/topic&trid=2122745"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r262": {
   "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"
  },
  "r263": {
   "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"
  },
  "r264": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r265": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r267": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(3),(4))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(5))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580"
  },
  "r270": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r271": {
   "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=6876686&loc=d3e534808-122878"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(f))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r273": {
   "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=116637391&loc=SL114874048-224260"
  },
  "r274": {
   "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=116637391&loc=SL114874048-224260"
  },
  "r275": {
   "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=116637391&loc=SL114874048-224260"
  },
  "r276": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(5))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r278": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r279": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(24))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r281": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r282": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r283": {
   "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=119400593&loc=d3e572229-122910"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.15(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.17)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r287": {
   "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=116637232&loc=SL114874131-224263"
  },
  "r288": {
   "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=116637232&loc=SL114874131-224263"
  },
  "r289": {
   "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=116637232&loc=SL114874131-224263"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580"
  },
  "r290": {
   "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"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=66023616&loc=SL35737432-115832"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29(Footnote 4))",
   "Topic": "948",
   "URI": "http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 2))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024"
  },
  "r296": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r297": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r298": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-13"
  },
  "r299": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1-"
  },
  "r3": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580"
  },
  "r300": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r301": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r302": {
   "Footnote": "2",
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "28"
  },
  "r303": {
   "Footnote": "4",
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "29"
  },
  "r304": {
   "Name": "Regulation S-X (SX)",
   "Number": "210",
   "Paragraph": "i",
   "Publisher": "SEC",
   "Section": "3",
   "Subsection": "10"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580"
  },
  "r33": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(12))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r35": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r36": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(4))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r39": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r4": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.3)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(b))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r43": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r44": {
   "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=116634182&loc=SL114868664-224227"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(27))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3000-108585"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21D",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=SL94080555-108585"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r6": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "230",
   "URI": "http://asc.fasb.org/topic&trid=2134446"
  },
  "r68": {
   "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"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790"
  },
  "r7": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790"
  },
  "r71": {
   "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=26873400&loc=d3e23780-122690"
  },
  "r72": {
   "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=26873400&loc=d3e23780-122690"
  },
  "r73": {
   "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=26873400&loc=d3e23780-122690"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(h)(2))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(k)(1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(n)(2))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(n))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1377-109256"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1278-109256"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1311-109256"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256"
  },
  "r88": {
   "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"
  },
  "r89": {
   "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"
  },
  "r9": {
   "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=6877327&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258"
  },
  "r92": {
   "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"
  },
  "r93": {
   "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"
  },
  "r94": {
   "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"
  },
  "r95": {
   "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"
  },
  "r96": {
   "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"
  },
  "r97": {
   "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"
  },
  "r98": {
   "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"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  }
 },
 "version": "2.1"
}
