{
 "instance": {
  "gahr-20200930.htm": {
   "axisCustom": 7,
   "axisStandard": 31,
   "contextCount": 336,
   "dts": {
    "calculationLink": {
     "local": [
      "gahr-20200930_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "gahr-20200930_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-eedm-def-2020-01-31.xml",
      "http://xbrl.fasb.org/srt/2020/elts/srt-eedm1-def-2020-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "gahr-20200930.htm"
     ]
    },
    "labelLink": {
     "local": [
      "gahr-20200930_lab.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-doc-2020-01-31.xml",
      "https://xbrl.sec.gov/dei/2020/dei-doc-2020-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "gahr-20200930_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2020/dei-ref-2020-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-ref-2020-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "gahr-20200930.xsd"
     ],
     "remote": [
      "http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd",
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-roles-2020-01-31.xsd",
      "https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd",
      "https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd",
      "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-parts-codification-2020-01-31.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd"
     ]
    }
   },
   "elementCount": 695,
   "entityCount": 1,
   "hidden": {
    "http://xbrl.sec.gov/dei/2020-01-31": 5,
    "total": 5
   },
   "keyCustom": 143,
   "keyStandard": 340,
   "memberCustom": 67,
   "memberStandard": 37,
   "nsprefix": "gahr",
   "nsuri": "http://www.griffincapital.com/20200930",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0001001 - Document - Document and Entity Information",
     "role": "http://www.griffincapital.com/role/DocumentandEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2109103 - Disclosure - Real Estate Investments, Net",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNet",
     "shortName": "Real Estate Investments, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2115104 - Disclosure - Identified Intangible Assets, Net",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNet",
     "shortName": "Identified Intangible Assets, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IntangibleAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2120105 - Disclosure - Other Assets, Net",
     "role": "http://www.griffincapital.com/role/OtherAssetsNet",
     "shortName": "Other Assets, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MortgageNotesPayableDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2125106 - Disclosure - Mortgage Loans Payable, Net",
     "role": "http://www.griffincapital.com/role/MortgageLoansPayableNet",
     "shortName": "Mortgage Loans Payable, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MortgageNotesPayableDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:LinesOfCreditTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2131107 - Disclosure - Line of Credit and Term Loan",
     "role": "http://www.griffincapital.com/role/LineofCreditandTermLoan",
     "shortName": "Line of Credit and Term Loan",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:LinesOfCreditTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2133108 - Disclosure - Derivative Financial Instruments",
     "role": "http://www.griffincapital.com/role/DerivativeFinancialInstruments",
     "shortName": "Derivative Financial Instruments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2137109 - Disclosure - Identified Intangible Liabilities, Net",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNet",
     "shortName": "Identified Intangible Liabilities, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2141110 - Disclosure - Commitments and Contingencies",
     "role": "http://www.griffincapital.com/role/CommitmentsandContingencies",
     "shortName": "Commitments and Contingencies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:RedeemableNoncontrollingInterestTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2142111 - Disclosure - Redeemable Noncontrolling Interests",
     "role": "http://www.griffincapital.com/role/RedeemableNoncontrollingInterests",
     "shortName": "Redeemable Noncontrolling Interests",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:RedeemableNoncontrollingInterestTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2146112 - Disclosure - Equity",
     "role": "http://www.griffincapital.com/role/Equity",
     "shortName": "Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfRealEstateInvestmentsNetTableTextBlock",
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateInvestmentPropertyNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1001002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
     "shortName": "CONDENSED CONSOLIDATED BALANCE SHEETS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:AccountsReceivableNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2155114 - Disclosure - Fair Value Measurements",
     "role": "http://www.griffincapital.com/role/FairValueMeasurements",
     "shortName": "Fair Value Measurements",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2159115 - Disclosure - Income Taxes",
     "role": "http://www.griffincapital.com/role/IncomeTaxes",
     "shortName": "Income Taxes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2162116 - Disclosure - Leases",
     "role": "http://www.griffincapital.com/role/Leases",
     "shortName": "Leases",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2169117 - Disclosure - Segment Reporting",
     "role": "http://www.griffincapital.com/role/SegmentReporting",
     "shortName": "Segment Reporting",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConcentrationRiskDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2172118 - Disclosure - Concentration of Credit Risk",
     "role": "http://www.griffincapital.com/role/ConcentrationofCreditRisk",
     "shortName": "Concentration of Credit Risk",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConcentrationRiskDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2176119 - Disclosure - Per Share Data",
     "role": "http://www.griffincapital.com/role/PerShareData",
     "shortName": "Per Share Data",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConsolidationPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2204201 - Disclosure - Summary of Significant Accounting Policies (Policies)",
     "role": "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies",
     "shortName": "Summary of Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ConsolidationPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2305301 - Disclosure - Summary of Significant Accounting Policies (Tables)",
     "role": "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesTables",
     "shortName": "Summary of Significant Accounting Policies (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfRealEstateInvestmentsNetTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2310302 - Disclosure - Real Estate Investments, Net (Tables)",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNetTables",
     "shortName": "Real Estate Investments, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfRealEstateInvestmentsNetTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2316303 - Disclosure - Identified Intangible Assets, Net (Tables)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetTables",
     "shortName": "Identified Intangible Assets, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LineOfCredit",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1002003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
     "shortName": "CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "INF",
      "lang": "en-US",
      "name": "us-gaap:PreferredStockSharesIssued",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2321304 - Disclosure - Other Assets, Net (Tables)",
     "role": "http://www.griffincapital.com/role/OtherAssetsNetTables",
     "shortName": "Other Assets, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleofActivityRelatedtoMortgageNotesPayableTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2326305 - Disclosure - Mortgage Loans Payable, Net (Tables)",
     "role": "http://www.griffincapital.com/role/MortgageLoansPayableNetTables",
     "shortName": "Mortgage Loans Payable, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleofActivityRelatedtoMortgageNotesPayableTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2334306 - Disclosure - Derivative Financial Instruments (Tables)",
     "role": "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsTables",
     "shortName": "Derivative Financial Instruments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfExpectedAmortizationExpenseIntangibleLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2338307 - Disclosure - Identified Intangible Liabilities, Net (Tables)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetTables",
     "shortName": "Identified Intangible Liabilities, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfExpectedAmortizationExpenseIntangibleLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "gahr:RedeemableNoncontrollingInterestTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RedeemableNoncontrollingInterestTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2343308 - Disclosure - Redeemable Noncontrolling Interests (Tables)",
     "role": "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsTables",
     "shortName": "Redeemable Noncontrolling Interests (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "gahr:RedeemableNoncontrollingInterestTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RedeemableNoncontrollingInterestTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2347309 - Disclosure - Equity (Tables)",
     "role": "http://www.griffincapital.com/role/EquityTables",
     "shortName": "Equity (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfLimitationOnAffiliateReimbursementTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2351310 - Disclosure - Related Party Transactions (Tables)",
     "role": "http://www.griffincapital.com/role/RelatedPartyTransactionsTables",
     "shortName": "Related Party Transactions (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gahr:ScheduleOfLimitationOnAffiliateReimbursementTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2356311 - Disclosure - Fair Value Measurements (Tables)",
     "role": "http://www.griffincapital.com/role/FairValueMeasurementsTables",
     "shortName": "Fair Value Measurements (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2360312 - Disclosure - Income Taxes (Tables)",
     "role": "http://www.griffincapital.com/role/IncomeTaxesTables",
     "shortName": "Income Taxes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LessorOperatingLeasePaymentsToBeReceivedMaturityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2363313 - Disclosure - Leases (Tables)",
     "role": "http://www.griffincapital.com/role/LeasesTables",
     "shortName": "Leases (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LessorOperatingLeasePaymentsToBeReceivedMaturityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseLeaseIncome",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1003004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:CostsAndExpenses",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2370314 - Disclosure - Segment Reporting (Tables)",
     "role": "http://www.griffincapital.com/role/SegmentReportingTables",
     "shortName": "Segment Reporting (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:ConcentrationRiskDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SchedulesOfConcentrationOfRiskByRiskFactorTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2373315 - Disclosure - Concentration of Credit Risk (Tables)",
     "role": "http://www.griffincapital.com/role/ConcentrationofCreditRiskTables",
     "shortName": "Concentration of Credit Risk (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:ConcentrationRiskDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SchedulesOfConcentrationOfRiskByRiskFactorTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:NatureOfOperations",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i4425a199d5254bb6b53e897978cb0da7_D20150123-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:EntityIncorporationDateOfIncorporation",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2402401 - Disclosure - Organization and Description of Business (Detail)",
     "role": "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
     "shortName": "Organization and Description of Business (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:NatureOfOperations",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i4425a199d5254bb6b53e897978cb0da7_D20150123-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:EntityIncorporationDateOfIncorporation",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:GovernmentGrantIncomeFromCARESAct",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2406402 - Disclosure - Summary of Accounting Policies (Details)",
     "role": "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails",
     "shortName": "Summary of Accounting Policies (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "id30ec3cf15454b9298bf8741250e3976_I20191231",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:AllowanceForDoubtfulAccountsReceivable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2407403 - Disclosure - Summary of Significant Accounting Policies Disaggregation of Revenues (Details)",
     "role": "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails",
     "shortName": "Summary of Significant Accounting Policies Disaggregation of Revenues (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "id1af3727871a4dfaa0f0f5015db6d5ae_D20200701-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i589096bf1f9b44349f50ae7e8489f9cb_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ContractWithCustomerAssetNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2408404 - Disclosure - Summary of Significant Accounting Policies Accounts Receivable and Deferred Revenue (Details)",
     "role": "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
     "shortName": "Summary of Significant Accounting Policies Accounts Receivable and Deferred Revenue (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i589096bf1f9b44349f50ae7e8489f9cb_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ContractWithCustomerAssetNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfRealEstateInvestmentsNetTableTextBlock",
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateInvestmentPropertyAtCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2411405 - Disclosure - Real Estate Investments, Net - Investments in Consolidated Properties (Detail)",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
     "shortName": "Real Estate Investments, Net - Investments in Consolidated Properties (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfRealEstateInvestmentsNetTableTextBlock",
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateInvestmentPropertyAtCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Depreciation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2412406 - Disclosure - Real Estate Investments, Net - Additional Information (Detail)",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
     "shortName": "Real Estate Investments, Net - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:RealEstateDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Depreciation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:NatureOfOperations",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "if9af74ad236048e184777cced1f574db_D20150206-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:AcquisitionAggregatedCostOfAcquiredPropertiesPurchasePrice",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2413407 - Disclosure - Real Estate Investments, Net - Summary of Acquisitions (Details)",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
     "shortName": "Real Estate Investments, Net - Summary of Acquisitions (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfAcquisitionsOfPropertiesTableTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i9551caad2a6a4ecea7d30a06fadfcc19_D20200101-20200930",
      "decimals": null,
      "lang": "en-US",
      "name": "gahr:TypeOfPropertyAcquired",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i570b3719e4854af79691c004e28a0dc3_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBuildingsandImprovements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2414408 - Disclosure - Real Estate Investments, Net - Assets and Liabilities Acquired (Details)",
     "role": "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
     "shortName": "Real Estate Investments, Net - Assets and Liabilities Acquired (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i570b3719e4854af79691c004e28a0dc3_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBuildingsandImprovements",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i85f74912ca734e8a8b53ab7b8ea0024a_I20181231",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SharesIssued",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF EQUITY",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ie511667046a14828a545b7ac3aebfa49_I20181231",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IntangibleAssetsNetExcludingGoodwill",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2417409 - Disclosure - Identified Intangible Assets - Summary of Identified Intangibles (Detail)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail",
     "shortName": "Identified Intangible Assets - Summary of Identified Intangibles (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i8592d3090a98459a8f4a85f6af171ade_I20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetsNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2418410 - Disclosure - Identified Intangible Assets - Summary of Amortization Expense on Identified Intangible Assets, Net (Detail)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail",
     "shortName": "Identified Intangible Assets - Summary of Amortization Expense on Identified Intangible Assets, Net (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfIntangibleAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2419411 - Disclosure - Identified Intangible Assets, Net Identified Intangible Assets, Net (Phantom) (Details)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
     "shortName": "Identified Intangible Assets, Net Identified Intangible Assets, Net (Phantom) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:IntangibleAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfIntangibleAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EquityMethodInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2422412 - Disclosure - Other Assets, Net - Other Assets, Net (Detail)",
     "role": "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail",
     "shortName": "Other Assets, Net - Other Assets, Net (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EquityMethodInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2423413 - Disclosure - Other Assets, Net - Additional Information (Detail)",
     "role": "http://www.griffincapital.com/role/OtherAssetsNetAdditionalInformationDetail",
     "shortName": "Other Assets, Net - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AmortizationOfFinancingCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccumulatedAmortizationDeferredFinanceCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2424414 - Disclosure - Other Assets, Net Other Assets, Net (Phantom) (Details)",
     "role": "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetPhantomDetails",
     "shortName": "Other Assets, Net Other Assets, Net (Phantom) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherAssetsTableTextBlock",
       "us-gaap:OtherAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccumulatedAmortizationDeferredFinanceCosts",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:MortgageNotesPayableDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtInstrumentCarryingAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2427415 - Disclosure - Mortgage Loans Payable, Net - Additional Information (Detail)",
     "role": "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail",
     "shortName": "Mortgage Loans Payable, Net - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:MortgageNotesPayableDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "INF",
      "lang": "en-US",
      "name": "gahr:NumberOfFixedRateMortgageLoansPayable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "mortgageloan",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "id30ec3cf15454b9298bf8741250e3976_I20191231",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SecuredDebt",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2428416 - Disclosure - Mortgage Loans Payable, Net - Mortgage Loans Payable (Detail)",
     "role": "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail",
     "shortName": "Mortgage Loans Payable, Net - Mortgage Loans Payable (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "gahr:Borrowingsandassumptionsonmortgageloanspayablenet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2429417 - Disclosure - Mortgage Loans Payable - Principal Payments Due on Mortgage Loans Payable (Detail)",
     "role": "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail",
     "shortName": "Mortgage Loans Payable - Principal Payments Due on Mortgage Loans Payable (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2432419 - Disclosure - Line of Credit and Term Loan (Detail)",
     "role": "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
     "shortName": "Line of Credit and Term Loan (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockDividendsPerShareDeclared",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parentheticals)",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommonStockDividendsPerShareDeclared",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usdPerShare",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2435420 - Disclosure - Derivative Financial Instruments - Additional Information (Details)",
     "role": "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails",
     "shortName": "Derivative Financial Instruments - Additional Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i7ba3996219b74ed6b0ad54fdebc3419b_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2436421 - Disclosure - Derivative Financial Instruments (Detail)",
     "role": "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail",
     "shortName": "Derivative Financial Instruments (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i7ba3996219b74ed6b0ad54fdebc3419b_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:FiniteLivedIntangibleLiabilitiesAmortizationExpensesRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2439422 - Disclosure - Identified Intangible Liabilities, Net - Summary of Amortization Expense on Below Market Leases (Detail)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail",
     "shortName": "Identified Intangible Liabilities, Net - Summary of Amortization Expense on Below Market Leases (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:FiniteLivedIntangibleLiabilitiesAmortizationExpensesRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OffMarketLeaseUnfavorable",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2440423 - Disclosure - Identified Intangible Liabilities, Net Identified Intangible Liabilities, Net - Additional Information (Details)",
     "role": "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails",
     "shortName": "Identified Intangible Liabilities, Net Identified Intangible Liabilities, Net - Additional Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "gahr:IdentifiedIntangibleLiabilitiesNetTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "gahr:AmortizationofIdentifiedIntangibleLiabilities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "gahr:RedeemableNoncontrollingInterestTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "id30ec3cf15454b9298bf8741250e3976_I20191231",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RedeemableNoncontrollingInterestEquityFairValue",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2444424 - Disclosure - Redeemable Noncontrolling Interests (Details)",
     "role": "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
     "shortName": "Redeemable Noncontrolling Interests (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "gahr:RedeemableNoncontrollingInterestTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "gahr:Proceedsfromredeemablenoncontrollinginterest",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:MinorityInterestOwnershipPercentageByParent",
       "span",
       "div",
       "gahr:RedeemableNoncontrollingInterestTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i9641cba3e64146a38ec36fc537e6ab58_I20200930",
      "decimals": "4",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MinorityInterestOwnershipPercentageByParent",
      "reportCount": 1,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2445425 - Disclosure - Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest (Phantom) (Details)",
     "role": "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails",
     "shortName": "Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest (Phantom) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PreferredStockSharesAuthorized",
       "span",
       "div",
       "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PreferredStockSharesAuthorized",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2448426 - Disclosure - Equity (Detail)",
     "role": "http://www.griffincapital.com/role/EquityDetail",
     "shortName": "Equity (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i517cbe5f13b340fb9bca402f5851a5a4_D20180216-20200930",
      "decimals": "3",
      "lang": "en-US",
      "name": "gahr:MaximumPercentageOfCommonStockRepurchasedDuringPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PreferredStockSharesAuthorized",
       "span",
       "div",
       "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PreferredStockSharesAuthorized",
      "reportCount": 1,
      "unitRef": "shares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2449427 - Disclosure - Equity Phantom (Details)",
     "role": "http://www.griffincapital.com/role/EquityPhantomDetails",
     "shortName": "Equity Phantom (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2452428 - Disclosure - Related Party Transactions - Additional Information (Detail)",
     "role": "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
     "shortName": "Related Party Transactions - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i6ed43939a6934a92891e40d92999df5d_D20190701-20190930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockIssuedDuringPeriodValueNewIssues",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2453429 - Disclosure - Related Party Transactions - Related Party Description (Detail)",
     "role": "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
     "shortName": "Related Party Transactions - Related Party Description (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i23921b26041d46b293327962c2f69f72_D20190101-20190930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:StockIssuedDuringPeriodValueNewIssues",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1006007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "role": "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
     "shortName": "CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "-3",
      "lang": "en-US",
      "name": "us-gaap:DepreciationDepletionAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfAmountOutstandingToAffiliatesTableTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DueToAffiliateCurrentAndNoncurrent",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2454430 - Disclosure - Related Party Transactions - Schedule of Amount Outstanding to Affiliates (Detail)",
     "role": "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
     "shortName": "Related Party Transactions - Schedule of Amount Outstanding to Affiliates (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "gahr:ScheduleOfAmountOutstandingToAffiliatesTableTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "if96968e38d864633ab31bf007a22973c_I20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:DueToAffiliateCurrentAndNoncurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i871933ef3cca4892afd35c53c4d08cc5_I20200930",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2457431 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)",
     "role": "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail",
     "shortName": "Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i871933ef3cca4892afd35c53c4d08cc5_I20200930",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:MortgageNotesPayableDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "-3",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SecuredDebt",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2458432 - Disclosure - Fair Value Measurements Fair Value by Balance Sheet Grouping (Details)",
     "role": "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails",
     "shortName": "Fair Value Measurements Fair Value by Balance Sheet Grouping (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "gahr:Linesofcreditandtermloannet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredFederalIncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2461433 - Disclosure - Income Taxes - Income Tax Expense (Benefit) (Details)",
     "role": "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails",
     "shortName": "Income Taxes - Income Tax Expense (Benefit) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DeferredFederalIncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseLeaseIncome",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2464434 - Disclosure - Leases Additional Information (Details)",
     "role": "http://www.griffincapital.com/role/LeasesAdditionalInformationDetails",
     "shortName": "Leases Additional Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:VariableLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2465435 - Disclosure - Leases Lessor, Future Minimum Rents Due (Details)",
     "role": "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails",
     "shortName": "Leases Lessor, Future Minimum Rents Due (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2466436 - Disclosure - Leases Components of Lease Cost (Details)",
     "role": "http://www.griffincapital.com/role/LeasesComponentsofLeaseCostDetails",
     "shortName": "Leases Components of Lease Cost (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R77": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2467437 - Disclosure - Leases Lease Term and Discount Rate (Details)",
     "role": "http://www.griffincapital.com/role/LeasesLeaseTermandDiscountRateDetails",
     "shortName": "Leases Lease Term and Discount Rate (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "us-gaap:OperatingLeasesOfLessorDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R78": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2468438 - Disclosure - Leases Future Minimum Rent Payments, Operating Leases (Details)",
     "role": "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails",
     "shortName": "Leases Future Minimum Rent Payments, Operating Leases (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R79": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:NatureOfOperations",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i725a148a4fa64551bc7382e9e9b83712_D20200930-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfReportableSegments",
      "reportCount": 1,
      "unitRef": "segment",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2471439 - Disclosure - Segment Reporting - Summary Information for Reportable Segments (Detail)",
     "role": "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail",
     "shortName": "Segment Reporting - Summary Information for Reportable Segments (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:OperatingLeasesIncomeStatementLeaseRevenue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NatureOfOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2101101 - Disclosure - Organization and Description of Business",
     "role": "http://www.griffincapital.com/role/OrganizationandDescriptionofBusiness",
     "shortName": "Organization and Description of Business",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NatureOfOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R80": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:ConcentrationRiskDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "idf1d37f416774f9f9ddb068d5aef906e_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfStatesInWhichEntityOperates",
      "reportCount": 1,
      "unitRef": "state",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2474440 - Disclosure - Concentration of Credit Risk - Additional Information (Detail)",
     "role": "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
     "shortName": "Concentration of Credit Risk - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R81": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:SchedulesOfConcentrationOfRiskByRiskFactorTextBlock",
       "us-gaap:ConcentrationRiskDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i2ad58eda4cd74594bcb1aa9f699c8965_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:AnnualBaseRent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2475441 - Disclosure - Concentration of Credit Risk - Schedule of Annualized Base Rent from Tenants at Consolidated Properties (Detail)",
     "role": "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
     "shortName": "Concentration of Credit Risk - Schedule of Annualized Base Rent from Tenants at Consolidated Properties (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:SchedulesOfConcentrationOfRiskByRiskFactorTextBlock",
       "us-gaap:ConcentrationRiskDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i2ad58eda4cd74594bcb1aa9f699c8965_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "gahr:AnnualBaseRent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R82": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i90760470104447d4bf5bfef4f3859368_D20200701-20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2477442 - Disclosure - Per Share Data (Detail)",
     "role": "http://www.griffincapital.com/role/PerShareDataDetail",
     "shortName": "Per Share Data (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "i136362087edb4b1799d805d64889bc1f_D20200101-20200930",
      "decimals": "0",
      "lang": "en-US",
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "shares",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2103102 - Disclosure - Summary of Significant Accounting Policies",
     "role": "http://www.griffincapital.com/role/SummaryofSignificantAccountingPolicies",
     "shortName": "Summary of Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gahr-20200930.htm",
      "contextRef": "ib49689bb562442bb991d52baafe44d1f_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 115,
   "tag": {
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "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",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "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",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentInformationTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package.",
        "label": "Document Information [Table]",
        "terseLabel": "Document Information [Table]"
       }
      }
     },
     "localname": "DocumentInformationTable",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r495"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report",
        "terseLabel": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r496"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "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",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine2": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Address Line 2 such as Street or Suite number",
        "label": "Entity Address, Address Line Two",
        "terseLabel": "Entity Address, Address Line Two"
       }
      }
     },
     "localname": "EntityAddressAddressLine2",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.",
        "label": "Entity [Domain]",
        "terseLabel": "Entity [Domain]"
       }
      }
     },
     "localname": "EntityDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityExTransitionPeriod": {
     "auth_ref": [
      "r499"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.",
        "label": "Entity Ex Transition Period",
        "terseLabel": "Entity Ex Transition Period"
       }
      }
     },
     "localname": "EntityExTransitionPeriod",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationDateOfIncorporation": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Date when an entity was incorporated",
        "label": "Entity Incorporation, Date of Incorporation",
        "terseLabel": "Date of incorporation"
       }
      }
     },
     "localname": "EntityIncorporationDateOfIncorporation",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInformationLineItems": {
     "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": "Entity Information [Line Items]",
        "terseLabel": "Entity Information [Line Items]"
       }
      }
     },
     "localname": "EntityInformationLineItems",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r497"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LegalEntityAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The set of legal entities associated with a report.",
        "label": "Legal Entity [Axis]",
        "terseLabel": "Legal Entity [Axis]"
       }
      }
     },
     "localname": "LegalEntityAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "gahr_A2018LineofCreditMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "2018 Line of Credit [Member]",
        "label": "2018 Line of Credit [Member]",
        "terseLabel": "2018 Line of Credit"
       }
      }
     },
     "localname": "A2018LineofCreditMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_A2020AcquisitionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "2020 Acquisitions [Member]",
        "label": "2020 Acquisitions [Member]",
        "terseLabel": "2020 Acquisitions"
       }
      }
     },
     "localname": "A2020AcquisitionsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AHIGroupHoldingsLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "AHI Group Holdings, LLC [Member]",
        "label": "AHI Group Holdings, LLC [Member]",
        "terseLabel": "AHI Group Holdings, LLC"
       }
      }
     },
     "localname": "AHIGroupHoldingsLLCMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Accruedstockholderservicingfee": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accrued stockholder servicing fee",
        "label": "Accrued stockholder servicing fee",
        "terseLabel": "Accrued stockholder servicing fee"
       }
      }
     },
     "localname": "Accruedstockholderservicingfee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AcquisitionAggregatedCostOfAcquiredPropertiesPurchasePrice": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition aggregated cost of acquired properties purchase price",
        "label": "Acquisition Aggregated Cost Of Acquired Properties Purchase Price",
        "terseLabel": "Contract Purchase Price"
       }
      }
     },
     "localname": "AcquisitionAggregatedCostOfAcquiredPropertiesPurchasePrice",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AcquisitionFeeOfContractPurchasePriceForPropertyAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition fee of contract purchase price for property acquired.",
        "label": "Acquisition Fee Of Contract Purchase Price For Property Acquired",
        "terseLabel": "Maximum acquisition fee of contract purchase price for property we acquire"
       }
      }
     },
     "localname": "AcquisitionFeeOfContractPurchasePriceForPropertyAcquired",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AcquisitionFeeOfContractPurchasePriceOfRealEstateRelatedInvestments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition fee of contract purchase price for real estate related investments.",
        "label": "Acquisition Fee Of Contract Purchase Price Of Real Estate Related Investments",
        "verboseLabel": "Maximum acquisition fee of real estate-related investment purchase price we originate or acquire"
       }
      }
     },
     "localname": "AcquisitionFeeOfContractPurchasePriceOfRealEstateRelatedInvestments",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AcquisitionFeeofEarnOutAmountPercent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition Fee of Earn-Out Amount, Percent",
        "label": "Acquisition Fee of Earn-Out Amount, Percent",
        "terseLabel": "Acquisition fee (as a percent of earn-out amount)"
       }
      }
     },
     "localname": "AcquisitionFeeofEarnOutAmountPercent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AcquisitionFeeofEarnoutAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition Fee of Earn-out Amount",
        "label": "Acquisition Fee of Earn-out Amount",
        "terseLabel": "Acquisition fee of earn-out amount paid"
       }
      }
     },
     "localname": "AcquisitionFeeofEarnoutAmount",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AcquisitionanddevelopmentfeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Acquisition and development fees",
        "label": "Acquisition and development fees [Member]",
        "terseLabel": "Acquisition and development fees [Member]"
       }
      }
     },
     "localname": "AcquisitionanddevelopmentfeesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AdjustmentstoAdditionalPaidinCapitalFairValueAdjustmenttoRedeemableNoncontrollingInterests": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Adjustments to Additional Paid in Capital, Fair Value Adjustment to Redeemable Noncontrolling Interests",
        "label": "Adjustments to Additional Paid in Capital, Fair Value Adjustment to Redeemable Noncontrolling Interests",
        "negatedTerseLabel": "Fair value adjustment to redeemable noncontrolling interests",
        "terseLabel": "Fair value adjustment to redeemable noncontrolling interests"
       }
      }
     },
     "localname": "AdjustmentstoAdditionalPaidinCapitalFairValueAdjustmenttoRedeemableNoncontrollingInterests",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AdvisorMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Advisor [Member]",
        "label": "Advisor [Member]",
        "terseLabel": "Advisor"
       }
      }
     },
     "localname": "AdvisorMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AdvisoryAgreementTerm": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Advisory Agreement Term",
        "label": "Advisory Agreement Term",
        "terseLabel": "Advisory agreement term"
       }
      }
     },
     "localname": "AdvisoryAgreementTerm",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "gahr_AggregateMaximumAmountOfCommonStockIssuableUnderPublicOffering": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate Maximum Amount Of Common Stock Issuable Under Public Offering",
        "label": "Aggregate Maximum Amount Of Common Stock Issuable Under Public Offering",
        "terseLabel": "Maximum amount of common stock issuable under public offering"
       }
      }
     },
     "localname": "AggregateMaximumAmountOfCommonStockIssuableUnderPublicOffering",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AggregateReallocatedMaximumAmountofCommonStockIssuableUnderPrimaryPublicOffering": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate Reallocated Maximum Amount of Common Stock Issuable Under Primary Public Offering",
        "label": "Aggregate Reallocated Maximum Amount of Common Stock Issuable Under Primary Public Offering",
        "terseLabel": "Aggregate reallocated maximum amount of common stock issuable under primary public offering"
       }
      }
     },
     "localname": "AggregateReallocatedMaximumAmountofCommonStockIssuableUnderPrimaryPublicOffering",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AmericanHealthcareInvestorsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "American Healthcare Investors [Member]",
        "label": "American Healthcare Investors [Member]",
        "terseLabel": "American Healthcare Investors"
       }
      }
     },
     "localname": "AmericanHealthcareInvestorsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AmortizationExpenseOnLeaseCommissions": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortization expense on lease commissions.",
        "label": "Amortization Expense On Lease Commissions",
        "terseLabel": "Amortization expense on lease commissions"
       }
      }
     },
     "localname": "AmortizationExpenseOnLeaseCommissions",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AmortizationofIdentifiedIntangibleLiabilities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortization of Identified Intangible Liabilities",
        "label": "Amortization of Identified Intangible Liabilities",
        "terseLabel": "Amortization of identified intangible liabilities"
       }
      }
     },
     "localname": "AmortizationofIdentifiedIntangibleLiabilities",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Amortizationofdeferredfinancingcostsrelatedtomortgage": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortization of deferred financing costs related to mortgage",
        "label": "Amortization of deferred financing costs related to mortgage",
        "terseLabel": "Amortization of deferred financing costs"
       }
      }
     },
     "localname": "Amortizationofdeferredfinancingcostsrelatedtomortgage",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AnnualBaseRent": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Annual base rent.",
        "label": "Annual Base Rent",
        "terseLabel": "Annual Base Rent"
       }
      }
     },
     "localname": "AnnualBaseRent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AnnualCumulativeNonCompoundedReturnOnGrossProceedsFromSaleOfSharesofourcommonstock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Annual Cumulative Non Compounded Return On Gross Proceeds From Sale Of Shares of our common stock",
        "label": "Annual Cumulative Non Compounded Return On Gross Proceeds From Sale Of Shares of our common stock",
        "terseLabel": "Annual cumulative non compounded return on gross proceeds from sale of shares of our common stock"
       }
      }
     },
     "localname": "AnnualCumulativeNonCompoundedReturnOnGrossProceedsFromSaleOfSharesofourcommonstock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AnnualCumulativeNonCompoundedReturnUponListingOfSharesofcommonstock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Annual Cumulative Non Compounded Return Upon Listing Of Shares of common stock",
        "label": "Annual Cumulative Non Compounded Return Upon Listing Of Shares of common stock",
        "terseLabel": "Annual cumulative non compounded return upon listing from sale of shares of common stock"
       }
      }
     },
     "localname": "AnnualCumulativeNonCompoundedReturnUponListingOfSharesofcommonstock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AssetAcquisitionAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition [Axis]",
        "label": "Asset Acquisition [Axis]",
        "terseLabel": "Asset Acquisition [Axis]"
       }
      }
     },
     "localname": "AssetAcquisitionAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_AssetAcquisitionDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for Asset Acquisition [Axis]",
        "label": "Asset Acquisition [Domain]",
        "terseLabel": "Asset Acquisition [Domain]"
       }
      }
     },
     "localname": "AssetAcquisitionDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets",
        "label": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets",
        "totalLabel": "Total assets acquired"
       }
      }
     },
     "localname": "AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBuildingsandImprovements": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails": {
       "order": 1.0,
       "parentTag": "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements",
        "label": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements",
        "terseLabel": "Building and improvements"
       }
      }
     },
     "localname": "AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBuildingsandImprovements",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFurnitureFixuresandEquipment": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails": {
       "order": 4.0,
       "parentTag": "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Furniture, Fixtures and Equipment",
        "label": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Furniture, Fixures and Equipment",
        "terseLabel": "Furniture, fixtures and equipment"
       }
      }
     },
     "localname": "AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFurnitureFixuresandEquipment",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedInplaceleases": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails": {
       "order": 3.0,
       "parentTag": "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, In- place leases",
        "label": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, In-place leases",
        "terseLabel": "In-place leases"
       }
      }
     },
     "localname": "AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedInplaceleases",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLand": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails": {
       "order": 2.0,
       "parentTag": "gahr_AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land",
        "label": "Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land",
        "terseLabel": "Land"
       }
      }
     },
     "localname": "AssetAcquisitionRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLand",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_AssetAndPropertyManagementFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset and property management fees.",
        "label": "Asset And Property Management Fees [Member]",
        "terseLabel": "Asset Management Fees [Member]"
       }
      }
     },
     "localname": "AssetAndPropertyManagementFeesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_AssetManagementFeePercent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset Management Fee Percentage",
        "label": "Asset Management Fee Percent",
        "terseLabel": "Asset management fee percentage"
       }
      }
     },
     "localname": "AssetManagementFeePercent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_AvalonMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Avalon [Member]",
        "label": "Avalon [Member]",
        "terseLabel": "Avalon"
       }
      }
     },
     "localname": "AvalonMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_BaseAcquisitionFeeForPropertyAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Base Acquisition Fee For Property Acquired",
        "label": "Base Acquisition Fee For Property Acquired",
        "terseLabel": "Base acquisition fee for property acquired"
       }
      }
     },
     "localname": "BaseAcquisitionFeeForPropertyAcquired",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_BaseAcquisitionFeeForRealEstateRelatedInvestments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Base Acquisition Fee For Real Estate Related Investments",
        "label": "Base Acquisition Fee For Real Estate Related Investments",
        "terseLabel": "Base acquisition fee for real estate related investment we acquire"
       }
      }
     },
     "localname": "BaseAcquisitionFeeForRealEstateRelatedInvestments",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_BaseAcquisitionFeePaidMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Base Acquisition Fee Paid [Member]",
        "label": "Base Acquisition Fee Paid [Member]",
        "terseLabel": "Base Acquisition Fee Paid"
       }
      }
     },
     "localname": "BaseAcquisitionFeePaidMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_BelowMarketLeaseMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Below market lease",
        "label": "Below Market Lease [Member]",
        "terseLabel": "Below-market leases"
       }
      }
     },
     "localname": "BelowMarketLeaseMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Borrowingsandassumptionsonmortgageloanspayablenet": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Borrowings and assumptions on mortgage loans payable, net",
        "label": "Borrowings and assumptions on mortgage loans payable, net",
        "terseLabel": "Assumption of mortgage loan payable, net"
       }
      }
     },
     "localname": "Borrowingsandassumptionsonmortgageloanspayablenet",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_CapitalExpendituresIncurred": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Capital expenditures incurred.",
        "label": "Capital Expenditures Incurred",
        "terseLabel": "Capital expenditures incurred"
       }
      }
     },
     "localname": "CapitalExpendituresIncurred",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_CapitalizedAcquisitionCostsandFeesAdditions": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Capitalized Acquisition Costs and Fees Additions",
        "label": "Capitalized Acquisition Costs and Fees Additions",
        "terseLabel": "Capitalized acquisition costs and fees additions"
       }
      }
     },
     "localname": "CapitalizedAcquisitionCostsandFeesAdditions",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Capitalizeddeferredfinancingcostsformortgages": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Capitalized deferred financing costs for mortgages",
        "label": "Capitalized deferred financing costs for mortgages",
        "negatedTerseLabel": "Deferred financing costs"
       }
      }
     },
     "localname": "Capitalizeddeferredfinancingcostsformortgages",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_CashFlowNoncashFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financing Activities:",
        "label": "Cash Flow Noncash Financing Activities [Abstract]",
        "terseLabel": "Financing Activities:"
       }
      }
     },
     "localname": "CashFlowNoncashFinancingActivitiesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_CashFlowNoncashInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investing Activities:",
        "label": "Cash Flow Noncash Investing Activities [Abstract]",
        "terseLabel": "Investing Activities:"
       }
      }
     },
     "localname": "CashFlowNoncashInvestingActivitiesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_CatalinaMaderaALFMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Catalina Madera ALF [Member]",
        "label": "Catalina Madera ALF [Member]",
        "terseLabel": "Catalina Madera ALF"
       }
      }
     },
     "localname": "CatalinaMaderaALFMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CatalinaWestHavenALFMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Catalina West Haven ALF [Member]",
        "label": "Catalina West Haven ALF [Member]",
        "terseLabel": "Catalina West Haven ALF"
       }
      }
     },
     "localname": "CatalinaWestHavenALFMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CatalinaWestHavenALFandCatalinaMaderaALFMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Catalina West Haven ALF and Catalina Madera ALF [Member]",
        "label": "Catalina West Haven ALF and Catalina Madera ALF [Member]",
        "terseLabel": "Catalina West Haven ALF and Catalina Madera ALF"
       }
      }
     },
     "localname": "CatalinaWestHavenALFandCatalinaMaderaALFMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CertificatesOfNeedMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Certificates Of Need [Member]",
        "label": "Certificates Of Need [Member]",
        "terseLabel": "Certificates of need"
       }
      }
     },
     "localname": "CertificatesOfNeedMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ChristopherM.BelfordMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Christopher M. Belford",
        "label": "Christopher M. Belford [Member]",
        "terseLabel": "Christopher M. Belford [Member]"
       }
      }
     },
     "localname": "ChristopherM.BelfordMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ColonyCapitalInc.Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Colony Capital Inc.",
        "label": "Colony Capital Inc. [Member]",
        "terseLabel": "Colony Capital Inc."
       }
      }
     },
     "localname": "ColonyCapitalInc.Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CommonClassIMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Common Class I [Member]",
        "label": "Common Class I [Member]",
        "terseLabel": "Common Class I"
       }
      }
     },
     "localname": "CommonClassIMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/DocumentandEntityInformation",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CommonClassTMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Common Class T [Member]",
        "label": "Common Class T [Member]",
        "terseLabel": "Common Class T"
       }
      }
     },
     "localname": "CommonClassTMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/DocumentandEntityInformation",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_CommonStockRepuchasedDuringPeriodUnderShareRepurchasePlanShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Common Stock repuchased during period under the share repurchase plan share",
        "label": "Common Stock Repuchased During Period Under Share Repurchase Plan Shares",
        "terseLabel": "Common stock repurchased during period under share repurchase plan shares"
       }
      }
     },
     "localname": "CommonStockRepuchasedDuringPeriodUnderShareRepurchasePlanShares",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "gahr_ConcentrationofCreditRiskAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Concentration of Credit Risk [Abstract]",
        "label": "Concentration of Credit Risk [Abstract]",
        "terseLabel": "Concentration of Credit Risk [Abstract]"
       }
      }
     },
     "localname": "ConcentrationofCreditRiskAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_ConditionOnePercentageOfOperatingExpensesOfAverageInvestedAsset": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Condition One: Percentage Of Operating Expenses Of Average Invested Asset",
        "label": "Condition One: Percentage Of Operating Expenses Of Average Invested Asset",
        "terseLabel": "Condition One: Percentage Of Operating Expenses Of Average Invested Asset"
       }
      }
     },
     "localname": "ConditionOnePercentageOfOperatingExpensesOfAverageInvestedAsset",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_ConditionTwoPercentageOfOperatingExpenseOfNetIncome": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Condition Two: Percentage Of Operating Expense Of Net Income",
        "label": "Condition Two: Percentage Of Operating Expense Of Net Income",
        "terseLabel": "Condition Two: Percentage Of Operating Expense Of Net Income"
       }
      }
     },
     "localname": "ConditionTwoPercentageOfOperatingExpenseOfNetIncome",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_ConstructionManagementFeeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Construction Management Fee [Member]",
        "label": "Construction Management Fee [Member]",
        "terseLabel": "Construction Management Fee [Member]"
       }
      }
     },
     "localname": "ConstructionManagementFeeMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ContingentAdvisorPaymentFee": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contingent Advisor Payment Fee",
        "label": "Contingent Advisor Payment Fee",
        "terseLabel": "Contingent advisor payment fee"
       }
      }
     },
     "localname": "ContingentAdvisorPaymentFee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_ContingentAdvisorPaymentIncurredMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contingent Advisor Payment Incurred [Member]",
        "label": "Contingent Advisor Payment Incurred [Member]",
        "terseLabel": "Contingent Advisor Payment Incurred"
       }
      }
     },
     "localname": "ContingentAdvisorPaymentIncurredMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ContractwithCustomerAssetIncreaseDecrease": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract with Customer, Asset, Increase (Decrease)",
        "label": "Contract with Customer, Asset, Increase (Decrease)",
        "terseLabel": "Contract with customer, asset, increase (decrease)"
       }
      }
     },
     "localname": "ContractwithCustomerAssetIncreaseDecrease",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_DRIPS3PublicOfferingMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "DRIP S-3 Public Offering [Member]",
        "label": "DRIP S-3 Public Offering [Member]",
        "terseLabel": "DRIP S-3 Public Offering"
       }
      }
     },
     "localname": "DRIPS3PublicOfferingMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_DateOfAcquisitionOfProperty": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Date of acquisition of property.",
        "label": "Date Of Acquisition Of Property",
        "terseLabel": "Date Acquired"
       }
      }
     },
     "localname": "DateOfAcquisitionOfProperty",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "dateItemType"
    },
    "gahr_DealerManagerFees": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Dealer manager fees",
        "label": "Dealer Manager Fees",
        "terseLabel": "Dealer manager fees"
       }
      }
     },
     "localname": "DealerManagerFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_DealermanagerfeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Dealer manager fees [Member]",
        "label": "Dealer manager fees [Member]",
        "terseLabel": "Dealer manager fees"
       }
      }
     },
     "localname": "DealermanagerfeesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_DebtInstrumentBaseRatePercent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt Instrument, Base Rate, Percent",
        "label": "Debt Instrument, Base Rate, Percent",
        "terseLabel": "Base rate"
       }
      }
     },
     "localname": "DebtInstrumentBaseRatePercent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_DeferralandExtensionTermCOVID19": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferral and Extension Term, COVID-19",
        "label": "Deferral and Extension Term, COVID-19",
        "terseLabel": "Deferral and extension term"
       }
      }
     },
     "localname": "DeferralandExtensionTermCOVID19",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "gahr_DerivativeFinancialInstrumentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative Financial Instruments [Abstract]",
        "label": "Derivative Financial Instruments [Abstract]",
        "terseLabel": "Derivative Financial Instruments [Abstract]"
       }
      }
     },
     "localname": "DerivativeFinancialInstrumentsAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_DevelopmentFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Development Fees",
        "label": "Development Fees [Member]",
        "terseLabel": "Development Fees [Member]"
       }
      }
     },
     "localname": "DevelopmentFeesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_DispositionFeeAsPercentageOfContractSalesPrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disposition Fee As Percentage Of Contract Sales Price",
        "label": "Disposition Fee As Percentage Of Contract Sales Price",
        "terseLabel": "Disposition fees as percentage of contract sales price"
       }
      }
     },
     "localname": "DispositionFeeAsPercentageOfContractSalesPrice",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_DispositionFeeAsPercentageOfCustomaryCompetitiveRealEstateCommission": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disposition Fee As Percentage Of Customary Competitive Real Estate Commission",
        "label": "Disposition Fee As Percentage Of Customary Competitive Real Estate Commission",
        "terseLabel": "Disposition fees as percentage of customary competitive real estate commission"
       }
      }
     },
     "localname": "DispositionFeeAsPercentageOfCustomaryCompetitiveRealEstateCommission",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_DistributionReinvestmentPlanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Distribution reinvestment plan.",
        "label": "Distribution Reinvestment Plan [Member]",
        "terseLabel": "Distribution Reinvestment Plan"
       }
      }
     },
     "localname": "DistributionReinvestmentPlanMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Distributionrateofcommonstockcapitaltoadvisor": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Distribution rate of common stock capital to advisor",
        "label": "Distribution rate of common stock capital to advisor",
        "terseLabel": "Distribution rate of common stock capital to advisor"
       }
      }
     },
     "localname": "Distributionrateofcommonstockcapitaltoadvisor",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_DocumentAndEntityInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Document and Entity Information [Abstract]",
        "label": "Document and Entity Information [Abstract]",
        "terseLabel": "Document and Entity Information [Abstract]"
       }
      }
     },
     "localname": "DocumentAndEntityInformationAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_ExecutiveVicePresidentAcquisitionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Executive Vice President, Acquisitions [Member]",
        "label": "Executive Vice President, Acquisitions [Member]",
        "terseLabel": "Executive Vice President, Acquisitions [Member]"
       }
      }
     },
     "localname": "ExecutiveVicePresidentAcquisitionsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ExecutiveVicePresidentAssetManagementMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Executive Vice President, Asset Management [Member]",
        "label": "Executive Vice President, Asset Management [Member]",
        "terseLabel": "Executive Vice President, Asset Management [Member]"
       }
      }
     },
     "localname": "ExecutiveVicePresidentAssetManagementMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_FederalFundsRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Federal Funds Rate [Member]",
        "label": "Federal Funds Rate [Member]",
        "terseLabel": "Federal Funds Rate"
       }
      }
     },
     "localname": "FederalFundsRateMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_FinancingReceivableAllowanceforCreditLossCollectionsorAdjustments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financing Receivable, Allowance for Credit Loss, Collections or Adjustments",
        "label": "Financing Receivable, Allowance for Credit Loss, Collections or Adjustments",
        "terseLabel": "Reduction in allowances from collections or adjustments"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceforCreditLossCollectionsorAdjustments",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite-Lived Intangible Asset, Expected Amortization, after Year Four",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, after Year Four",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAccumulatedAmortization": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Accumulated Amortization.",
        "label": "Finite Lived Intangible Liabilities Accumulated Amortization",
        "terseLabel": "Finite lived intangible liabilities accumulated amortization"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAccumulatedAmortization",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesAfterYearFive": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 6.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses After Year Five",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses After Year Five",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesAfterYearFive",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesRemainderOfFiscalYear": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 1.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses Remainder Of Fiscal Year",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses Remainder Of Fiscal Year",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesRemainderOfFiscalYear",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearFive": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 5.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses Year Five",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses Year Five",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearFive",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearFour": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 4.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses Year Four",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses Year Four",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearFour",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearThree": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 3.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses Year Three",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses Year Three",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearThree",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearTwo": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": 2.0,
       "parentTag": "gahr_FiniteLivedIntangibleLiabilitiesNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Amortization Expenses Year Two",
        "label": "Finite Lived Intangible Liabilities Amortization Expenses Year Two",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesAmortizationExpensesYearTwo",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesByMajorClassAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities By Major Class [Axis]",
        "label": "Finite Lived Intangible Liabilities By Major Class [Axis]",
        "terseLabel": "Finite Lived Intangible Liabilities By Major Class [Axis]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesByMajorClassAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesByMajorClassDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities By Major Class [Domain]",
        "label": "Finite Lived Intangible Liabilities By Major Class [Domain]",
        "terseLabel": "Finite Lived Intangible Liabilities By Major Class [Domain]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesByMajorClassDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesNet": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite lived intangible liabilities net.",
        "label": "Finite Lived Intangible Liabilities Net",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesNet",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetSummaryofAmortizationExpenseonBelowMarketLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_FiniteLivedIntangibleLiabilitiesUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Finite Lived Intangible Liabilities Useful Life.",
        "label": "Finite Lived Intangible Liabilities Useful Life",
        "terseLabel": "Finite lived intangible liabilities useful life"
       }
      }
     },
     "localname": "FiniteLivedIntangibleLiabilitiesUsefulLife",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "gahr_GeneralPartnershipMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "General Partnership [Member]",
        "label": "General Partnership [Member]",
        "terseLabel": "General Partnership"
       }
      }
     },
     "localname": "GeneralPartnershipMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_GovernmentGrantIncomeFromCARESAct": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "gahr_RevenuesandGovernmentGrantIncomeFromCARESAct",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": 5.0,
       "parentTag": "gahr_Segmentnetoperatingincome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Government Grant Income From CARES Act",
        "label": "Government Grant Income From CARES Act",
        "terseLabel": "Grant income"
       }
      }
     },
     "localname": "GovernmentGrantIncomeFromCARESAct",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_GovernmentGrantsPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Government Grants [Policy Text Block]",
        "label": "Government Grants [Policy Text Block]",
        "terseLabel": "Government Grants"
       }
      }
     },
     "localname": "GovernmentGrantsPolicyTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_GriffinAmericanAdvisorMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Griffin American Advisor.",
        "label": "Griffin American Advisor [Member]",
        "terseLabel": "Griffin American Advisor"
       }
      }
     },
     "localname": "GriffinAmericanAdvisorMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_GriffinAmericanHealthcareREITIVInc.Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Griffin-American Healthcare REIT IV, Inc. [Member]",
        "label": "Griffin-American Healthcare REIT IV, Inc. [Member]",
        "terseLabel": "Griffin-American Healthcare REIT IV, Inc."
       }
      }
     },
     "localname": "GriffinAmericanHealthcareREITIVInc.Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_GriffinCapitalCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Griffin Capital Corporation [Member]",
        "label": "Griffin Capital Corporation [Member]",
        "terseLabel": "Griffin Capital Corporation"
       }
      }
     },
     "localname": "GriffinCapitalCorporationMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_GrossLeasableArea": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Gross Leasable Area",
        "label": "Gross Leasable Area",
        "terseLabel": "GLA (Sq Ft)"
       }
      }
     },
     "localname": "GrossLeasableArea",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail"
     ],
     "xbrltype": "areaItemType"
    },
    "gahr_IdentifiedIntangibleLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identified Intangible Liabilities [Abstract]",
        "label": "Identified Intangible Liabilities [Abstract]",
        "terseLabel": "Identified Intangible Liabilities [Abstract]"
       }
      }
     },
     "localname": "IdentifiedIntangibleLiabilitiesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_IdentifiedIntangibleLiabilitiesNetTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identified Intangible Liabilities, Net",
        "label": "Identified Intangible Liabilities Net [Text Block]",
        "terseLabel": "Identified Intangible Liabilities Net"
       }
      }
     },
     "localname": "IdentifiedIntangibleLiabilitiesNetTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_Imputedleverageonequityraisepercentageasbasisofacquisitionfee": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Imputed leverage on equity raise percentage as basis of acquisition fee",
        "label": "Imputed leverage on equity raise percentage as basis of acquisition fee",
        "terseLabel": "Imputed leverage on equity raise percentage as basis of acquisition fee"
       }
      }
     },
     "localname": "Imputedleverageonequityraisepercentageasbasisofacquisitionfee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_IncomeTaxesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Income Taxes [Abstract]",
        "label": "Income Taxes [Abstract]",
        "terseLabel": "Income Taxes [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_IncreaseDecreasetoOperatingLeaseLiability": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Increase (Decrease) to Operating Lease Liability",
        "label": "Increase (Decrease) to Operating Lease Liability",
        "terseLabel": "Operating lease liability"
       }
      }
     },
     "localname": "IncreaseDecreasetoOperatingLeaseLiability",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_IncreaseDecreasetoRightofUseAsset": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Increase (Decrease) to Right-of-Use Asset",
        "label": "Increase (Decrease) to Right-of-Use Asset",
        "terseLabel": "Right-of-use asset"
       }
      }
     },
     "localname": "IncreaseDecreasetoRightofUseAsset",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_IntangibleAssetNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Intangible Asset Net [Abstract]",
        "label": "Intangible Asset Net [Abstract]",
        "terseLabel": "Intangible Asset Net [Abstract]"
       }
      }
     },
     "localname": "IntangibleAssetNetAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_IntangibleLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Intangible Liabilities [Abstract]",
        "label": "Intangible Liabilities [Abstract]",
        "terseLabel": "Intangible Liabilities [Abstract]"
       }
      }
     },
     "localname": "IntangibleLiabilitiesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_InterestrateAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "interest rate [Axis]",
        "label": "interest rate [Axis]",
        "terseLabel": "interest rate [Axis]"
       }
      }
     },
     "localname": "InterestrateAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_InterestrateDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for interest rate [Axis]",
        "label": "interest rate [Domain]",
        "terseLabel": "interest rate [Domain]"
       }
      }
     },
     "localname": "InterestrateDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_InvestmentRateByOfficer": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investment rate by officer.",
        "label": "Investment Rate By Officer",
        "terseLabel": "Investment Rate By Officer"
       }
      }
     },
     "localname": "InvestmentRateByOfficer",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_JamesF.FlahertyIIIMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "James F. Flaherty III [Member]",
        "label": "James F. Flaherty III [Member]",
        "terseLabel": "James F. Flaherty III"
       }
      }
     },
     "localname": "JamesF.FlahertyIIIMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_JeffreyT.HansonDannyProskyandMathieuB.StreiffMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Jeffrey T. Hanson, Danny Prosky, and Mathieu B. Streiff [Member]",
        "label": "Jeffrey T. Hanson, Danny Prosky, and Mathieu B. Streiff [Member]",
        "terseLabel": "Jeffrey T. Hanson, Danny Prosky, and Mathieu B. Streiff [Member]"
       }
      }
     },
     "localname": "JeffreyT.HansonDannyProskyandMathieuB.StreiffMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_JointVentureunamortizedbasisdifference": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Joint venture unamortized basis difference",
        "label": "Joint Venture unamortized basis difference",
        "terseLabel": "Joint Venture unamortized basis difference"
       }
      }
     },
     "localname": "JointVentureunamortizedbasisdifference",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Jointventureownershipinterest": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Joint venture ownership interest",
        "label": "Joint venture ownership interest",
        "terseLabel": "Joint venture ownership interest"
       }
      }
     },
     "localname": "Jointventureownershipinterest",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_LeaseCommissionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lease commissions.",
        "label": "Lease Commissions [Member]",
        "terseLabel": "Lease Commissions [Member]"
       }
      }
     },
     "localname": "LeaseCommissionsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lessee, Operating Lease, Liability, to be Paid, after Year Four",
        "label": "Lessee, Operating Lease, Liability, to be Paid, after Year Four",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityToBePaidAfterYearFour",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LessorOperatingLeasePaymentToBeReceivedAfterYearFour": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lessor, Operating Lease, Payment to be Received, after Year Four",
        "label": "Lessor, Operating Lease, Payment to be Received, after Year Four",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentToBeReceivedAfterYearFour",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LimitedPartnershipMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Limited Partnership [Member]",
        "label": "Limited Partnership [Member]",
        "terseLabel": "Limited Partnership"
       }
      }
     },
     "localname": "LimitedPartnershipMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_LineOfCreditFacilityAverageDailyUsedAmountPercentageConditionOne": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line of credit facility average daily used amount percentage condition one.",
        "label": "Line Of Credit Facility Average Daily Used Amount Percentage Condition One",
        "terseLabel": "Average daily used amount percentage condition one"
       }
      }
     },
     "localname": "LineOfCreditFacilityAverageDailyUsedAmountPercentageConditionOne",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_LineOfCreditFacilityAverageDailyUsedAmountPercentageConditionTwo": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line of credit facility average daily used amount percentage condition two.",
        "label": "Line Of Credit Facility Average Daily Used Amount Percentage Condition Two",
        "terseLabel": "Average daily used amount percentage condition two"
       }
      }
     },
     "localname": "LineOfCreditFacilityAverageDailyUsedAmountPercentageConditionTwo",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_LineOfCreditFacilityIncreaseAmountToBorrowingCapacity": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line Of Credit Facility, Increase Amount To Borrowing Capacity",
        "label": "Line Of Credit Facility, Increase Amount To Borrowing Capacity",
        "terseLabel": "Potential increase to borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityIncreaseAmountToBorrowingCapacity",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LineOfCreditFacilityPotentialMaximumBorrowingCapacity": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line Of Credit Facility, Potential Maximum Borrowing Capacity",
        "label": "Line Of Credit Facility, Potential Maximum Borrowing Capacity",
        "terseLabel": "Potential maximum borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityPotentialMaximumBorrowingCapacity",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageConditionOne": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line of credit facility unused capacity commitment fee percentage condition one.",
        "label": "Line Of Credit Facility Unused Capacity Commitment Fee Percentage Condition One",
        "terseLabel": "Commitment fee percentage condition one"
       }
      }
     },
     "localname": "LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageConditionOne",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageConditionTwo": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line of credit facility unused capacity commitment fee percentage condition two.",
        "label": "Line Of Credit Facility Unused Capacity Commitment Fee Percentage Condition Two",
        "terseLabel": "Commitment fee percentage condition two"
       }
      }
     },
     "localname": "LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageConditionTwo",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_LinesOfCreditRelatedToAcquisitionOfProperties": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lines Of Credit Related To Acquisition Of Properties",
        "label": "Lines Of Credit Related To Acquisition Of Properties",
        "verboseLabel": "Line of Credit"
       }
      }
     },
     "localname": "LinesOfCreditRelatedToAcquisitionOfProperties",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LinesOfCreditTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lines of credit.",
        "label": "Lines Of Credit [Text Block]",
        "terseLabel": "Line of Credit and Term Loan"
       }
      }
     },
     "localname": "LinesOfCreditTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoan"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_Linesofcreditandtermloannet": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lines of credit and term loan, net of deferred financing costs",
        "label": "Lines of credit and term loan, net",
        "terseLabel": "Line of credit and term loans"
       }
      }
     },
     "localname": "Linesofcreditandtermloannet",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LongTermDebtMaturityAfterYearFour": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Long-Term Debt, Maturity, after Year Four",
        "label": "Long-Term Debt, Maturity, after Year Four",
        "terseLabel": "Thereafter"
       }
      }
     },
     "localname": "LongTermDebtMaturityAfterYearFour",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_LouisianaSeniorHousingPortfolioMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Louisiana Senior Housing Portfolio [Member]",
        "label": "Louisiana Senior Housing Portfolio [Member]",
        "terseLabel": "Louisiana Senior Housing Portfolio"
       }
      }
     },
     "localname": "LouisianaSeniorHousingPortfolioMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_MaximumAmountOfCommonStockIssuableUnderPublicOffering": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum amount of common stock issuable under public offering.",
        "label": "Maximum Amount Of Common Stock Issuable Under Public Offering",
        "terseLabel": "Maximum dollar amount of common stock issuable under public offering"
       }
      }
     },
     "localname": "MaximumAmountOfCommonStockIssuableUnderPublicOffering",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_MaximumInvestmentRateByOfficerEVP": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum Investment Rate By Officer EVP",
        "label": "Maximum Investment Rate By Officer EVP",
        "terseLabel": "Maximum Investment Rate By Officer EVP"
       }
      }
     },
     "localname": "MaximumInvestmentRateByOfficerEVP",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MaximumPercentageOfCommonStockRepurchasedDuringPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum Percentage of common stock repurchased during the period as a percentage of weighted average number of shares of common stock outstanding during the prior calendar year.",
        "label": "Maximum Percentage Of Common Stock Repurchased During Period",
        "terseLabel": "Maximum percentage of common stock repurchased during period"
       }
      }
     },
     "localname": "MaximumPercentageOfCommonStockRepurchasedDuringPeriod",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MaximumPercentageOfConstructionManagementFees": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum Percentage Of Construction Management Fees",
        "label": "Maximum Percentage Of Construction Management Fees",
        "terseLabel": "Maximum Percentage Of Construction Management Fees"
       }
      }
     },
     "localname": "MaximumPercentageOfConstructionManagementFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MaximumPercentageOfDispositionFees": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum Percentage Of Disposition Fee of Contract Sales Price",
        "label": "Maximum Percentage Of Disposition Fees",
        "terseLabel": "Maximum percentage of disposition fee"
       }
      }
     },
     "localname": "MaximumPercentageOfDispositionFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MaximumPercentageOfFeesAndExpensesAssociatedWithAcquisition": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum percentage of fees and expenses associated with the acquisition.",
        "label": "Maximum percentage Of Fees And Expenses Associated With Acquisition",
        "terseLabel": "Maximum percentage of fees and expenses associated with the acquisition"
       }
      }
     },
     "localname": "MaximumPercentageOfFeesAndExpensesAssociatedWithAcquisition",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MaximumPercentageOfLeaseFees": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum Percentage Of Lease Fees",
        "label": "Maximum Percentage Of Lease Fees",
        "terseLabel": "Maximum percentage of lease fee"
       }
      }
     },
     "localname": "MaximumPercentageOfLeaseFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_Maximumpercentageofdealermanagerfee": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum percentage of dealer manager fee",
        "label": "Maximum percentage of dealer manager fee",
        "terseLabel": "Maximum percentage of dealer manager fee"
       }
      }
     },
     "localname": "Maximumpercentageofdealermanagerfee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_Maximumpercentageofstockholderservicingfee": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum percentage of stockholder servicing fee",
        "label": "Maximum percentage of stockholder servicing fee",
        "terseLabel": "Maximum percentage of stockholder servicing fee"
       }
      }
     },
     "localname": "Maximumpercentageofstockholderservicingfee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MedicaidMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Medicaid [Member]",
        "label": "Medicaid [Member]",
        "terseLabel": "Medicaid"
       }
      }
     },
     "localname": "MedicaidMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_MedicalOfficeBuildingMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Medical office building.",
        "label": "Medical Office Building [Member]",
        "terseLabel": "Medical Office Building"
       }
      }
     },
     "localname": "MedicalOfficeBuildingMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_MeridianMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Meridian [Member]",
        "label": "Meridian [Member]",
        "terseLabel": "Meridian"
       }
      }
     },
     "localname": "MeridianMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_MinimumConditionContingentAdvisorPayment": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum Condition Contingent Advisor Payment",
        "label": "Minimum Condition Contingent Advisor Payment",
        "terseLabel": "Contingent Advisor Payment Holdback"
       }
      }
     },
     "localname": "MinimumConditionContingentAdvisorPayment",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_MinimumInvestmentRateByOfficerEVP": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum Investment Rate By Officer EVP",
        "label": "Minimum Investment Rate By Officer EVP",
        "terseLabel": "Minimum Investment Rate By Officer EVP"
       }
      }
     },
     "localname": "MinimumInvestmentRateByOfficerEVP",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MinimumPercentShareOfAnnualizedBaseRentAccountedByTenants": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum percent share of annualized base rent accounted by tenants.",
        "label": "Minimum Percent Share Of Annualized Base Rent Accounted By Tenants",
        "terseLabel": "Minimum Percent Share Of Annualized Base Rent Accounted By Tenants"
       }
      }
     },
     "localname": "MinimumPercentShareOfAnnualizedBaseRentAccountedByTenants",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MinimumPercentShareOfEachStateAnnualizedBaseRentThatCompanyOwned": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum percent share of each state annualized base rent that company owned.",
        "label": "Minimum Percent Share Of Each State Annualized Base Rent That Company Owned",
        "terseLabel": "Minimum percent share of each state annualized base rent"
       }
      }
     },
     "localname": "MinimumPercentShareOfEachStateAnnualizedBaseRentThatCompanyOwned",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MinimumPercentageOfLeaseFees": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Minimum Percentage Of Lease Fees",
        "label": "Minimum Percentage Of Lease Fees",
        "terseLabel": "Minimum percentage of lease fee"
       }
      }
     },
     "localname": "MinimumPercentageOfLeaseFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_MortgageLoanActivitiesRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage Loan Activities [Roll Forward]",
        "label": "Mortgage Loan Activities [Roll Forward]",
        "terseLabel": "Change in Carrying Amount of Mortgage Loans Payable [Roll Forward]"
       }
      }
     },
     "localname": "MortgageLoanActivitiesRollForward",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_MortgageLoansPayableNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage Loans Payable, Net [Abstract]",
        "label": "Mortgage Loans Payable, Net [Abstract]",
        "terseLabel": "Mortgage Loans Payable, Net [Abstract]"
       }
      }
     },
     "localname": "MortgageLoansPayableNetAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_MortgageLoansPayableNetMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage Loans Payable, Net [Member]",
        "label": "Mortgage Loans Payable, Net [Member]",
        "terseLabel": "Mortgage loan payable"
       }
      }
     },
     "localname": "MortgageLoansPayableNetMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NatureofRelatedPartyTransactionCostAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nature of Related Party Transaction Cost [Axis]",
        "label": "Nature of Related Party Transaction Cost [Axis]",
        "terseLabel": "Nature of Related Party Transaction Cost [Axis]"
       }
      }
     },
     "localname": "NatureofRelatedPartyTransactionCostAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_NatureofRelatedPartyTransactionExpenseDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for Nature of Related Party Transaction Expense [Axis]",
        "label": "Nature of Related Party Transaction Expense [Domain]",
        "terseLabel": "Nature of Related Party Transaction Expense [Domain]"
       }
      }
     },
     "localname": "NatureofRelatedPartyTransactionExpenseDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NetIncomeLossincludingPortionAttributabletoNoncontrollingInterestExcludingPreferredStockDividend": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The consolidated profit and loss for the period, net of income tax, including the portion attributable to the noncontrolling interest and excluding preferred stock dividend",
        "label": "Net Income (Loss), including Portion Attributable to Noncontrolling Interest Excluding Preferred Stock Dividend",
        "terseLabel": "Net loss"
       }
      }
     },
     "localname": "NetIncomeLossincludingPortionAttributabletoNoncontrollingInterestExcludingPreferredStockDividend",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Netearningofjointventureallocatedtononcontrollinginterest": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net earning of joint venture allocated to noncontrolling interest",
        "label": "Net earning of joint venture allocated to noncontrolling interest",
        "terseLabel": "Net earning of joint venture allocated to noncontrolling interest"
       }
      }
     },
     "localname": "Netearningofjointventureallocatedtononcontrollinginterest",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_NoncontrollingInterestPhantomAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Noncontrolling Interest Phantom [Abstract]",
        "label": "Noncontrolling Interest Phantom [Abstract]",
        "terseLabel": "Noncontrolling Interest Phantom [Abstract]"
       }
      }
     },
     "localname": "NoncontrollingInterestPhantomAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_NotionalAmount1395Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Notional Amount, 139.5",
        "label": "Notional Amount, 139.5 [Member]",
        "terseLabel": "Notional Amount, 139.5"
       }
      }
     },
     "localname": "NotionalAmount1395Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NotionalAmount150Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Notional Amount, 15.0",
        "label": "Notional Amount, 15.0 [Member]",
        "terseLabel": "Notional Amount, 15.0"
       }
      }
     },
     "localname": "NotionalAmount150Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NotionalAmount367Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Notional Amount, 36.7",
        "label": "Notional Amount, 36.7 [Member]",
        "terseLabel": "Notional Amount, 36.7"
       }
      }
     },
     "localname": "NotionalAmount367Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NotionalAmount450Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Notional Amount, 45.0",
        "label": "Notional Amount, 45.0 [Member]",
        "terseLabel": "Notional Amount, 45.0"
       }
      }
     },
     "localname": "NotionalAmount450Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NotionalAmount588Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Notional Amount, 58.8",
        "label": "Notional Amount, 58.8 [Member]",
        "terseLabel": "Notional Amount, 58.8"
       }
      }
     },
     "localname": "NotionalAmount588Member",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_NumberOfBuildingsAcquiredFromUnaffiliatedParties": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of Buildings Acquired From Unaffiliated Parties",
        "label": "Number of Buildings Acquired from Unaffiliated Parties",
        "terseLabel": "Number of buildings acquired from unaffiliated parties"
       }
      }
     },
     "localname": "NumberOfBuildingsAcquiredFromUnaffiliatedParties",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberOfConsecutiveFiscalQuarterForReimbursementMeasurement": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number Of Consecutive Fiscal Quarter For Reimbursement Measurement",
        "label": "Number Of Consecutive Fiscal Quarter For Reimbursement Measurement",
        "terseLabel": "Number Of Consecutive Fiscal Quarter For Reimbursement Measurement"
       }
      }
     },
     "localname": "NumberOfConsecutiveFiscalQuarterForReimbursementMeasurement",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberOfFixedRateMortgageLoansPayable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of fixed rate mortgage loans payable.",
        "label": "Number Of Fixed Rate Mortgage Loans Payable",
        "terseLabel": "Number Of fixed rate mortgage loans payable"
       }
      }
     },
     "localname": "NumberOfFixedRateMortgageLoansPayable",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberOfSeniorHousingRIDEAImpaired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of Senior Housing-RIDEA Impaired",
        "label": "Number of Senior Housing-RIDEA Impaired",
        "terseLabel": "Number of senior housing - RIDEA facilities"
       }
      }
     },
     "localname": "NumberOfSeniorHousingRIDEAImpaired",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberOfTenantsWithMoreThanTenPercentOfAnnualBaseRent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of tenants with More than ten percent of annual base rent.",
        "label": "Number Of Tenants With More Than Ten Percent Of Annual Base Rent",
        "terseLabel": "Number of tenants with more than ten percent of annual base rent"
       }
      }
     },
     "localname": "NumberOfTenantsWithMoreThanTenPercentOfAnnualBaseRent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberofAcquisitionsCompletedfromUnaffiliatedParties": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of acquisitions completed from unaffiliated parties",
        "label": "Number of Acquisitions Completed from Unaffiliated Parties",
        "terseLabel": "Number of acquisitions completed from unaffiliated parties"
       }
      }
     },
     "localname": "NumberofAcquisitionsCompletedfromUnaffiliatedParties",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_NumberofPropertiesAcquiredfromUnaffiliatedParties": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of properties acquired from unaffiliated parties",
        "label": "Number of Properties Acquired from Unaffiliated Parties",
        "terseLabel": "Number of properties acquired from unaffiliated parties"
       }
      }
     },
     "localname": "NumberofPropertiesAcquiredfromUnaffiliatedParties",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "gahr_OfficerAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Officer",
        "label": "Officer [Axis]",
        "terseLabel": "Officer [Axis]"
       }
      }
     },
     "localname": "OfficerAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_OfficerDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for Officer",
        "label": "Officer [Domain]",
        "terseLabel": "Officer [Domain]"
       }
      }
     },
     "localname": "OfficerDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_OneMonthEurodollarMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "One-Month Eurodollar [Member]",
        "label": "One-Month Eurodollar [Member]",
        "terseLabel": "One-Month Eurodollar"
       }
      }
     },
     "localname": "OneMonthEurodollarMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_OtherAmortization": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other amortization including deferred financing costs, above/below market leases, leasehold interests, above market leasehold interest, debt discount/premium, closing costs and origination fees",
        "label": "Other Amortization",
        "terseLabel": "Other amortization"
       }
      }
     },
     "localname": "OtherAmortization",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_OtherAssetsNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other Assets, Net [Abstract]",
        "label": "Other Assets, Net [Abstract]",
        "terseLabel": "Other Assets, Net [Abstract]"
       }
      }
     },
     "localname": "OtherAssetsNetAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_OtherAssetsNetPhantomAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other Assets, Net (Phantom) [Abstract]",
        "label": "Other Assets, Net (Phantom) [Abstract]",
        "terseLabel": "Other Assets, Net (Phantom) [Abstract]"
       }
      }
     },
     "localname": "OtherAssetsNetPhantomAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_OtherorganizationalandofferingexpensesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other organizational and offering expenses [Member]",
        "label": "Other organizational and offering expenses [Member]",
        "terseLabel": "Other organizational and offering expenses"
       }
      }
     },
     "localname": "OtherorganizationalandofferingexpensesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Ownershippercentageinaffiliate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Ownership percentage in affiliate",
        "label": "Ownership percentage in affiliate",
        "terseLabel": "Ownership percentage in affiliate"
       }
      }
     },
     "localname": "Ownershippercentageinaffiliate",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PaymentsForProceedsFromSecurityDepositsFinancingActivities": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash inflow or outflow of security deposits. Does not include the security deposits retained in the event of default or damage to the property or otherwise retained and applied to accounts receivable which are reflected as an operating activity.",
        "label": "Payments For Proceeds From Security Deposits Financing Activities",
        "terseLabel": "Security deposits"
       }
      }
     },
     "localname": "PaymentsForProceedsFromSecurityDepositsFinancingActivities",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PaymentsforPreacquisitionexpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payments for Pre-acquisition expenses",
        "label": "Payments for Pre-acquisition expenses",
        "negatedTerseLabel": "Pre-acquisition expenses"
       }
      }
     },
     "localname": "PaymentsforPreacquisitionexpenses",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PaymentsofEarnOut": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payments of Earn-Out",
        "label": "Payments of Earn-Out",
        "terseLabel": "Payments of earn-out"
       }
      }
     },
     "localname": "PaymentsofEarnOut",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PaymentstoRedeemableNoncontrollingInterest": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payments to redeemable noncontrolling interest",
        "label": "Payments to Redeemable Noncontrolling Interest",
        "negatedLabel": "Distributions to redeemable noncontrolling interests",
        "negatedTerseLabel": "Payments to Redeemable Noncontrolling Interest"
       }
      }
     },
     "localname": "PaymentstoRedeemableNoncontrollingInterest",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Payoffofmortgageloanpayable": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payoff of mortgage loan payable",
        "label": "Payoff of mortgage loan payable",
        "terseLabel": "Payoff of mortgage loan payable"
       }
      }
     },
     "localname": "Payoffofmortgageloanpayable",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PercentageOfAnnualBaseRent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of annual base rent.",
        "label": "Percentage Of Annual Base Rent",
        "terseLabel": "Percentage of annual base rent",
        "verboseLabel": "Percentage\u00a0of Annualized Base Rent"
       }
      }
     },
     "localname": "PercentageOfAnnualBaseRent",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfDealerManagerFee": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Dealer manager fee percentage.",
        "label": "Percentage Of Dealer Manager Fee",
        "terseLabel": "Percentage of dealer manager fee"
       }
      }
     },
     "localname": "PercentageOfDealerManagerFee",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfDistributionofNetProceedsFromSaleOfProperties": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Distribution of Net Proceeds From Sale Of Properties",
        "label": "Percentage Of Distribution of Net Proceeds From Sale Of Properties",
        "terseLabel": "Percentage of distribution of net proceeds from sale of properties"
       }
      }
     },
     "localname": "PercentageOfDistributionofNetProceedsFromSaleOfProperties",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfOperatingExpensesOfAverageInvestedAssets": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of operating expenses of average invested assets.",
        "label": "Percentage Of Operating Expenses Of Average Invested Assets",
        "terseLabel": "Percentage Of Operating Expenses Of Average Invested Assets"
       }
      }
     },
     "localname": "PercentageOfOperatingExpensesOfAverageInvestedAssets",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfOperatingExpensesOfNetIncome": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of operating expenses of net income.",
        "label": "Percentage Of Operating Expenses Of Net Income",
        "terseLabel": "Percentage Of Operating Expenses Of Net Income"
       }
      }
     },
     "localname": "PercentageOfOperatingExpensesOfNetIncome",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfPropertyManagementOversightFees": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Property Management Oversight Fees",
        "label": "Percentage Of Property Management Oversight Fees",
        "terseLabel": "Percentage of property management oversight fee"
       }
      }
     },
     "localname": "PercentageOfPropertyManagementOversightFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfPropertyManagementOversightFeesMultipleTenants": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Property Management Oversight Fees - Multiple Tenants",
        "label": "Percentage Of Property Management Oversight Fees - Multiple Tenants",
        "terseLabel": "Percentage of property management oversight fee - multiple tenants"
       }
      }
     },
     "localname": "PercentageOfPropertyManagementOversightFeesMultipleTenants",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PercentageOfPropertyOversightFeesGrossMonthlyCashReceipts": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Property Oversight Fees - Gross Monthly Cash Receipts",
        "label": "Percentage Of Property Oversight Fees - Gross Monthly Cash Receipts",
        "terseLabel": "Percentage of property management oversight fee - gross monthly cash receipts"
       }
      }
     },
     "localname": "PercentageOfPropertyOversightFeesGrossMonthlyCashReceipts",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_PreacquisitionexpensesIncurredbutNotyetPaid": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Pre-acquisition expenses Incurred but Not yet Paid",
        "label": "Pre-acquisition expenses Incurred but Not yet Paid",
        "terseLabel": "Accrued pre-acquisition expenses"
       }
      }
     },
     "localname": "PreacquisitionexpensesIncurredbutNotyetPaid",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PrivateandOtherPayorsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Private and Other Payors [Member]",
        "label": "Private and Other Payors [Member]",
        "terseLabel": "Private and Other Payors"
       }
      }
     },
     "localname": "PrivateandOtherPayorsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ProceedsfromRedeemableNoncontrollingInterests": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Proceeds from Redeemable Noncontrolling Interests",
        "label": "Proceeds from Redeemable Noncontrolling Interests",
        "terseLabel": "Contributions from redeemable noncontrolling interest"
       }
      }
     },
     "localname": "ProceedsfromRedeemableNoncontrollingInterests",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Proceedsfromredeemablenoncontrollinginterest": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from redeemable noncontrolling interest.",
        "label": "Proceeds from redeemable noncontrolling interest",
        "terseLabel": "Proceeds from redeemable noncontrolling interest"
       }
      }
     },
     "localname": "Proceedsfromredeemablenoncontrollinginterest",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_PropertyManagementFeeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Property management fee [Member]",
        "label": "Property Management Fee [Member]",
        "terseLabel": "Property Management Fee [Member]"
       }
      }
     },
     "localname": "PropertyManagementFeeMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RCTierPropertiesLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "RC Tier Properties, LLC [Member]",
        "label": "RC Tier Properties, LLC [Member]",
        "terseLabel": "RC Tier Properties LLC"
       }
      }
     },
     "localname": "RCTierPropertiesLLCMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RealEstateAcquisitionAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Real Estate Acquisition [Axis]",
        "label": "Real Estate Acquisition [Axis]",
        "terseLabel": "Real Estate Acquisition [Axis]"
       }
      }
     },
     "localname": "RealEstateAcquisitionAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_RealEstateAcquisitionDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for Real Estate Acquisition [Axis]",
        "label": "Real Estate Acquisition [Domain]",
        "terseLabel": "Real Estate Acquisition [Domain]"
       }
      }
     },
     "localname": "RealEstateAcquisitionDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Real Estate Investments, Net - Assets and Liabilities Acquired [Abstract]",
        "label": "Real Estate Investments, Net - Assets and Liabilities Acquired [Abstract]",
        "terseLabel": "Real Estate Investments, Net - Assets and Liabilities Acquired [Abstract]"
       }
      }
     },
     "localname": "RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_ReallocatedMaximumAmountOfCommonStockIssuableUnderPrimaryPublicOffering": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reallocated Maximum Amount Of Common Stock Issuable Under Public Offering",
        "label": "Reallocated Maximum Amount Of Common Stock Issuable Under Primary Public Offering",
        "terseLabel": "Reallocated maximum amount of common stock issuable under primary public offering"
       }
      }
     },
     "localname": "ReallocatedMaximumAmountOfCommonStockIssuableUnderPrimaryPublicOffering",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_RedeemableLimitedPartnershipUnitsMemberDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Redeemable Limited Partnership Units [Member]",
        "label": "Redeemable Limited Partnership Units [Member] [Domain]",
        "terseLabel": "Redeemable Limited Partnership Units"
       }
      }
     },
     "localname": "RedeemableLimitedPartnershipUnitsMemberDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RedeemableNoncontrollingInterestAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Redeemable Noncontrolling Interest [Abstract]",
        "label": "Redeemable Noncontrolling Interest [Abstract]",
        "terseLabel": "Redeemable Noncontrolling Interest [Abstract]"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_RedeemableNoncontrollingInterestTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Redeemable Noncontrolling Interest",
        "label": "Redeemable Noncontrolling Interest [Text Block]",
        "terseLabel": "Redeemable Noncontrolling Interests"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterests"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ReelectedorNewlyElectedIndependentDirectorsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Re-elected or Newly Elected Independent Directors [Member]",
        "label": "Re-elected or Newly Elected Independent Directors [Member]",
        "terseLabel": "Re-elected or Newly Elected Independent Directors [Member]"
       }
      }
     },
     "localname": "ReelectedorNewlyElectedIndependentDirectorsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ReimbursementofacquisitionexpensesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reimbursement of acquisition expenses [Member]",
        "label": "Reimbursement of acquisition expenses [Member]",
        "terseLabel": "Reimbursement of acquisition expenses [Member]"
       }
      }
     },
     "localname": "ReimbursementofacquisitionexpensesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RelatedPartyTransactionsTotalAcquisitionFees": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Related Party Transactions Total Acquisition Fees",
        "label": "Related Party Transactions Total Acquisition Fees",
        "verboseLabel": "Total Acquisition Fee"
       }
      }
     },
     "localname": "RelatedPartyTransactionsTotalAcquisitionFees",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_ResidentFeesandServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Resident Fees and Services [Member]",
        "label": "Resident Fees and Services [Member]",
        "terseLabel": "Resident Fees and Services"
       }
      }
     },
     "localname": "ResidentFeesandServicesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_RevenuesandGovernmentGrantIncomeFromCARESAct": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 7.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revenues and Government Grant Income From CARES Act",
        "label": "Revenues and Government Grant Income From CARES Act",
        "totalLabel": "Total revenues and grant income"
       }
      }
     },
     "localname": "RevenuesandGovernmentGrantIncomeFromCARESAct",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_SaleOfStockByClassOfOfferingAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sale Of Stock By Class Of Offering [Axis]",
        "label": "Sale Of Stock By Class Of Offering [Axis]",
        "terseLabel": "Sale Of Stock By Class Of Offering [Axis]"
       }
      }
     },
     "localname": "SaleOfStockByClassOfOfferingAxis",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_SaleOfStockByClassOfOfferingDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sale Of Stock By Class Of Offering [Domain]",
        "label": "Sale Of Stock By Class Of Offering [Domain]",
        "terseLabel": "Sale Of Stock By Class Of Offering [Domain]"
       }
      }
     },
     "localname": "SaleOfStockByClassOfOfferingDomain",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ScheduleOfAcquisitionsOfPropertiesTableTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of acquisitions of properties.",
        "label": "Schedule Of Acquisitions Of Properties Table [Table Text Block]",
        "terseLabel": "Schedule Of Acquisitions Of Properties Table"
       }
      }
     },
     "localname": "ScheduleOfAcquisitionsOfPropertiesTableTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleOfAmountOutstandingToAffiliatesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of amount outstanding to affiliates.",
        "label": "Schedule Of Amount Outstanding To Affiliates Table [Text Block]",
        "terseLabel": "Schedule Of Amount Outstanding To Affiliates Table"
       }
      }
     },
     "localname": "ScheduleOfAmountOutstandingToAffiliatesTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleOfExpectedAmortizationExpenseIntangibleLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the estimated aggregate amortization expense for intangible liabilities subject to amortization for each of the five succeeding fiscal years.",
        "label": "Schedule Of Expected Amortization Expense Intangible Liabilities Table [Text Block]",
        "terseLabel": "Schedule Of Expected Amortization Expense Intangible Liabilities Table"
       }
      }
     },
     "localname": "ScheduleOfExpectedAmortizationExpenseIntangibleLiabilitiesTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleOfLimitationOnAffiliateReimbursementTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of limitation on affiliate reimbursement [Text Block]",
        "label": "Schedule of limitation on affiliate reimbursement [Table Text Block]",
        "terseLabel": "Schedule of limitation on affiliate reimbursement"
       }
      }
     },
     "localname": "ScheduleOfLimitationOnAffiliateReimbursementTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleOfRealEstateInvestmentsNetTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the detail of real estate investments, net.",
        "label": "Schedule Of Real Estate Investments Net Table [Text Block]",
        "terseLabel": "Schedule Of Real Estate Investments Table"
       }
      }
     },
     "localname": "ScheduleOfRealEstateInvestmentsNetTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleofActivityRelatedtoMortgageNotesPayableTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of activity related to mortgage notes payable",
        "label": "Schedule of Activity Related to Mortgage Notes Payable [Table Text Block]",
        "terseLabel": "Schedule of Activity Related to Mortgage Notes Payable"
       }
      }
     },
     "localname": "ScheduleofActivityRelatedtoMortgageNotesPayableTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_ScheduleofAssetAcquisitionsbyAcquisitionTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of Asset Acquisitions, by Acquisition [Table Text Block]",
        "label": "Schedule of Asset Acquisitions, by Acquisition [Table Text Block]",
        "terseLabel": "Schedule of Recognized Identified Assets Acquired and Liabilities Assumed"
       }
      }
     },
     "localname": "ScheduleofAssetAcquisitionsbyAcquisitionTableTextBlock",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gahr_Segmentnetoperatingincome": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Segment net operating income",
        "label": "Segment net operating income",
        "totalLabel": "Segment net operating income"
       }
      }
     },
     "localname": "Segmentnetoperatingincome",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_SellingCommissionsExpenses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Selling commissions expenses.",
        "label": "Selling Commissions Expenses",
        "terseLabel": "Selling commissions expenses"
       }
      }
     },
     "localname": "SellingCommissionsExpenses",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_SellingCommissionsPercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Selling commissions percentage.",
        "label": "Selling Commissions Percentage",
        "terseLabel": "Selling commissions percentage"
       }
      }
     },
     "localname": "SellingCommissionsPercentage",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_SeniorHousingMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Senior Housing [Member]",
        "label": "Senior Housing [Member]",
        "terseLabel": "Senior Housing"
       }
      }
     },
     "localname": "SeniorHousingMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_SeniorHousingRIDEAMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Senior Housing-RIDEA [Member]",
        "label": "Senior Housing-RIDEA [Member]",
        "terseLabel": "Senior Housing-RIDEA"
       }
      }
     },
     "localname": "SeniorHousingRIDEAMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingPercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share based compensation arrangement by share based payment award equity instruments other than options vesting percentage on the grant date.",
        "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vesting Percentage",
        "terseLabel": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vesting Percentage"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingPercentage",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_ShareRepurchasePlanHoldingPeriodConditionOne": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share repurchase plan holding period condition one.",
        "label": "Share Repurchase Plan Holding Period Condition One",
        "terseLabel": "Share repurchase plan holding period"
       }
      }
     },
     "localname": "ShareRepurchasePlanHoldingPeriodConditionOne",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "gahr_ShareRepurchasePlanPercentageofPriceperShareConditionOne": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share Repurchase Plan Percentage of Price per-Share Condition One",
        "label": "Share Repurchase Plan Percentage of Price per-Share Condition One",
        "terseLabel": "Share repurchase plan percentage of price per-share condition one"
       }
      }
     },
     "localname": "ShareRepurchasePlanPercentageofPriceperShareConditionOne",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_ShareRepurchasePlanPercentageofPriceperShareConditionTwo": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share Repurchase Plan Percentage of Price per-Share Condition Two",
        "label": "Share Repurchase Plan Percentage of Price per-Share Condition Two",
        "terseLabel": "Share repurchase plan percentage of price per-share condition two"
       }
      }
     },
     "localname": "ShareRepurchasePlanPercentageofPriceperShareConditionTwo",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_SkilledNursingFacilitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Skilled Nursing Facilities [Member]",
        "label": "Skilled Nursing Facilities [Member]",
        "terseLabel": "Skilled Nursing Facilities"
       }
      }
     },
     "localname": "SkilledNursingFacilitiesMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_StockAcquiredAverageCostPerShare": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total cost of shares repurchased divided by the total number of shares repurchased.",
        "label": "Stock Acquired Average Cost Per Share",
        "terseLabel": "Stock acquired, average cost per share"
       }
      }
     },
     "localname": "StockAcquiredAverageCostPerShare",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "gahr_StockIssuedDuringPeriodValueNewIssue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock issued during period value new issue.",
        "label": "Stock Issued During Period Value New Issue",
        "terseLabel": "Value of stock purchased"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssue",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_StockRepuchasedDuringPeriodValueUnderShareRepurchasePlanValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Common tock repuchased during period under the share repurchase plan value",
        "label": "Stock Repuchased During Period Value Under the Share Repurchase Plan Value",
        "terseLabel": "Stock repurchased during period, value under the share repurchase plan, value"
       }
      }
     },
     "localname": "StockRepuchasedDuringPeriodValueUnderShareRepurchasePlanValue",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_StockholderServicingFeeIncurred": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stockholder Servicing Fee Incurred",
        "label": "Stockholder Servicing Fee Incurred",
        "terseLabel": "Stockholder servicing fee incurred"
       }
      }
     },
     "localname": "StockholderServicingFeeIncurred",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_StockholderServicingFeePayable": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stockholder Servicing Fee Payable",
        "label": "Stockholder Servicing Fee Payable",
        "terseLabel": "Stockholder servicing fee payable"
       }
      }
     },
     "localname": "StockholderServicingFeePayable",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_Stockholderdailyservicingfeepercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stockholder daily servicing fee percentage",
        "label": "Stockholder daily servicing fee percentage",
        "terseLabel": "Stockholder daily servicing fee percentage"
       }
      }
     },
     "localname": "Stockholderdailyservicingfeepercentage",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "gahr_SubordinatedDistributionOfNetSalesProceedsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subordinated distribution of net sales proceeds.",
        "label": "Subordinated Distribution Of Net Sales Proceeds [Member]",
        "terseLabel": "Subordinated Distribution Of Net Sales Proceeds [Member]"
       }
      }
     },
     "localname": "SubordinatedDistributionOfNetSalesProceedsMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_SubordinatedDistributionUponTerminationMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subordinated distribution upon termination.",
        "label": "Subordinated Distribution Upon Termination [Member]",
        "terseLabel": "Subordinated Distribution Upon Termination [Member]"
       }
      }
     },
     "localname": "SubordinatedDistributionUponTerminationMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_SubordinatedDistributionuponListingMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subordinated DistributionUpon Listing [Member]",
        "label": "Subordinated DistributionUpon Listing [Member]",
        "terseLabel": "Subordinated DistributionUpon Listing [Member]"
       }
      }
     },
     "localname": "SubordinatedDistributionuponListingMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_SubscriptionsInOfferingOfCommonStockReceivedAndAcceptedShares": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subscriptions in offering of common stock received and accepted, shares",
        "label": "Subscriptions In Offering Of Common Stock Received And Accepted Shares",
        "verboseLabel": "Subscriptions in offering of common stock received and accepted shares"
       }
      }
     },
     "localname": "SubscriptionsInOfferingOfCommonStockReceivedAndAcceptedShares",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "gahr_SubscriptionsInOfferingOfCommonStockReceivedAndAcceptedValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subscriptions in offering of common stock received and accepted, value",
        "label": "Subscriptions In Offering Of Common Stock Received And Accepted Value",
        "verboseLabel": "Subscriptions in offering of common stock received and accepted value"
       }
      }
     },
     "localname": "SubscriptionsInOfferingOfCommonStockReceivedAndAcceptedValue",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_SummaryofSignificantAccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summary of Significant Accounting Policies [Abstract]",
        "label": "Summary of Significant Accounting Policies [Abstract]",
        "terseLabel": "Summary of Significant Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "SummaryofSignificantAccountingPoliciesAbstract",
     "nsuri": "http://www.griffincapital.com/20200930",
     "xbrltype": "stringItemType"
    },
    "gahr_Swap020InterestRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Swap, 0.20% Interest Rate",
        "label": "Swap, 0.20% Interest Rate [Member]",
        "terseLabel": "Swap, 0.20% Interest Rate Member"
       }
      }
     },
     "localname": "Swap020InterestRateMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Swap2.49InterestRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Swap, 2.49% Interest Rate [Member]",
        "label": "Swap, 2.49% Interest Rate [Member]",
        "terseLabel": "Swap, 2.49% Interest Rate"
       }
      }
     },
     "localname": "Swap2.49InterestRateMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Swap2.53InterestRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Swap, 2.53% Interest Rate",
        "label": "Swap, 2.53% Interest Rate [Member]",
        "terseLabel": "Swap, 2.53% Interest Rate"
       }
      }
     },
     "localname": "Swap2.53InterestRateMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_Swinglineloan": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Swing line loan",
        "label": "Swing line loan",
        "terseLabel": "Swing line loan"
       }
      }
     },
     "localname": "Swinglineloan",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_TenantImprovementOverage": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tenant Improvement Overage",
        "label": "Tenant Improvement Overage",
        "terseLabel": "Tenant improvement overage"
       }
      }
     },
     "localname": "TenantImprovementOverage",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gahr_TermLoanFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Term Loan Facility [Member]",
        "label": "Term Loan Facility [Member]",
        "terseLabel": "Term Loan Facility"
       }
      }
     },
     "localname": "TermLoanFacilityMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_TermLoanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Term Loan [Member]",
        "label": "Term Loan [Member]",
        "terseLabel": "Term Loan"
       }
      }
     },
     "localname": "TermLoanMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_TwoThousandFifteenIncentivePlanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Two Thousand Fifteen Incentive Plan [Member]",
        "label": "Two Thousand Fifteen Incentive Plan [Member]",
        "terseLabel": "Two Thousand Fifteen Incentive Plan"
       }
      }
     },
     "localname": "TwoThousandFifteenIncentivePlanMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "gahr_TypeOfPropertyAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of property acquired.",
        "label": "Type Of Property Acquired",
        "terseLabel": "Type"
       }
      }
     },
     "localname": "TypeOfPropertyAcquired",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "gahr_WendieNewmanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Wendie Newman",
        "label": "Wendie Newman [Member]",
        "terseLabel": "Wendie Newman [Member]"
       }
      }
     },
     "localname": "WendieNewmanMember",
     "nsuri": "http://www.griffincapital.com/20200930",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_BoardOfDirectorsChairmanMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Board of Directors Chairman [Member]",
        "terseLabel": "Board of Directors Chairman [Member]"
       }
      }
     },
     "localname": "BoardOfDirectorsChairmanMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ChiefFinancialOfficerMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Chief Financial Officer [Member]",
        "terseLabel": "Chief Financial Officer [Member]"
       }
      }
     },
     "localname": "ChiefFinancialOfficerMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ExecutiveOfficerMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Executive Officer [Member]",
        "terseLabel": "Executive Officer [Member]"
       }
      }
     },
     "localname": "ExecutiveOfficerMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ExecutiveVicePresidentMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Executive Vice President [Member]",
        "terseLabel": "Executive Vice President [Member]"
       }
      }
     },
     "localname": "ExecutiveVicePresidentMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MajorCustomersAxis": {
     "auth_ref": [
      "r166",
      "r230",
      "r234",
      "r463"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Customer [Axis]",
        "terseLabel": "Customer [Axis]"
       }
      }
     },
     "localname": "MajorCustomersAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r247",
      "r250",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r460",
      "r464"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r247",
      "r250",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r460",
      "r464"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MortgageLoansOnRealEstateAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]",
        "terseLabel": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]"
       }
      }
     },
     "localname": "MortgageLoansOnRealEstateAbstract",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "srt_MortgageLoansOnRealEstateLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]",
        "terseLabel": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]"
       }
      }
     },
     "localname": "MortgageLoansOnRealEstateLineItems",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_MortgageLoansOnRealEstateScheduleTable": {
     "auth_ref": [
      "r479"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table]",
        "terseLabel": "SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table]"
       }
      }
     },
     "localname": "MortgageLoansOnRealEstateScheduleTable",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_NameOfMajorCustomerDomain": {
     "auth_ref": [
      "r166",
      "r230",
      "r234",
      "r463"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Customer [Domain]",
        "terseLabel": "Customer [Domain]"
       }
      }
     },
     "localname": "NameOfMajorCustomerDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_OwnershipAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Ownership [Axis]",
        "terseLabel": "Ownership [Axis]"
       }
      }
     },
     "localname": "OwnershipAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_OwnershipDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Ownership [Domain]",
        "terseLabel": "Ownership [Domain]"
       }
      }
     },
     "localname": "OwnershipDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_PresidentMember": {
     "auth_ref": [
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "President [Member]",
        "terseLabel": "President [Member]"
       }
      }
     },
     "localname": "PresidentMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r162",
      "r230",
      "r232",
      "r403",
      "r459",
      "r461"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Axis]",
        "terseLabel": "Product and Service [Axis]"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [
      "r162",
      "r230",
      "r232",
      "r403",
      "r459",
      "r461"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Domain]",
        "terseLabel": "Product and Service [Domain]"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r236",
      "r247",
      "r250",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r460",
      "r464"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statistical Measurement [Axis]",
        "terseLabel": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r236",
      "r247",
      "r250",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r401",
      "r402",
      "r460",
      "r464"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statistical Measurement [Domain]",
        "terseLabel": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RestatementAxis": {
     "auth_ref": [
      "r82",
      "r83",
      "r84",
      "r85",
      "r86",
      "r87",
      "r90",
      "r91",
      "r92",
      "r94",
      "r95",
      "r96",
      "r97",
      "r98",
      "r111",
      "r180",
      "r181",
      "r268",
      "r285",
      "r467",
      "r468",
      "r469",
      "r470",
      "r471",
      "r472",
      "r473",
      "r474",
      "r475",
      "r476"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revision of Prior Period [Axis]",
        "terseLabel": "Restatement [Axis]"
       }
      }
     },
     "localname": "RestatementAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RestatementDomain": {
     "auth_ref": [
      "r82",
      "r83",
      "r84",
      "r85",
      "r86",
      "r87",
      "r90",
      "r91",
      "r92",
      "r94",
      "r95",
      "r96",
      "r97",
      "r98",
      "r111",
      "r180",
      "r181",
      "r268",
      "r285",
      "r467",
      "r468",
      "r469",
      "r470",
      "r471",
      "r472",
      "r473",
      "r474",
      "r475",
      "r476"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revision of Prior Period [Domain]",
        "terseLabel": "Restatement [Domain]"
       }
      }
     },
     "localname": "RestatementDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ScenarioForecastMember": {
     "auth_ref": [
      "r248"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Forecast [Member]",
        "terseLabel": "Forecast"
       }
      }
     },
     "localname": "ScenarioForecastMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ScenarioUnspecifiedDomain": {
     "auth_ref": [
      "r248"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Scenario [Domain]",
        "terseLabel": "Scenario [Domain]"
       }
      }
     },
     "localname": "ScenarioUnspecifiedDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [
      "r163",
      "r164",
      "r230",
      "r233",
      "r462",
      "r481",
      "r482",
      "r483",
      "r484",
      "r485",
      "r486",
      "r487",
      "r488"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Geographical [Domain]",
        "terseLabel": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r163",
      "r164",
      "r230",
      "r233",
      "r462",
      "r478",
      "r481",
      "r482",
      "r483",
      "r484",
      "r485",
      "r486",
      "r487",
      "r488",
      "r489"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Geographical [Axis]",
        "terseLabel": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_StatementScenarioAxis": {
     "auth_ref": [
      "r211",
      "r248",
      "r392"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Scenario [Axis]",
        "terseLabel": "Scenario [Axis]"
       }
      }
     },
     "localname": "StatementScenarioAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_TitleOfIndividualAxis": {
     "auth_ref": [
      "r168",
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Title of Individual [Axis]",
        "terseLabel": "Title of Individual [Axis]"
       }
      }
     },
     "localname": "TitleOfIndividualAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_TitleOfIndividualWithRelationshipToEntityDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Title of Individual [Domain]",
        "terseLabel": "Title of Individual [Domain]"
       }
      }
     },
     "localname": "TitleOfIndividualWithRelationshipToEntityDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "stpr_MO": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "MISSOURI",
        "terseLabel": "MISSOURI"
       }
      }
     },
     "localname": "MO",
     "nsuri": "http://xbrl.sec.gov/stpr/2018-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AboveMarketLeasesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Leases acquired as part of a real property acquisition at above market lease rate.",
        "label": "Above Market Leases [Member]",
        "terseLabel": "Above-market leases"
       }
      }
     },
     "localname": "AboveMarketLeasesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Accounting Policies [Abstract]",
        "terseLabel": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent": {
     "auth_ref": [
      "r430",
      "r453"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.",
        "label": "Accounts Payable and Accrued Liabilities",
        "terseLabel": "Accounts payable and accrued liabilities"
       }
      }
     },
     "localname": "AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableNet": {
     "auth_ref": [
      "r13",
      "r441"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "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, after Allowance for Credit Loss",
        "terseLabel": "Accounts and other receivables, net"
       }
      }
     },
     "localname": "AccountsReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedAmortizationDeferredFinanceCosts": {
     "auth_ref": [
      "r22",
      "r359"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated amortization of debt issuance costs.",
        "label": "Accumulated Amortization, Debt Issuance Costs",
        "terseLabel": "Accumulated amortization, debt issuance costs"
       }
      }
     },
     "localname": "AccumulatedAmortizationDeferredFinanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetPhantomDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapital": {
     "auth_ref": [
      "r14",
      "r268"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r82",
      "r83",
      "r85",
      "r265",
      "r266",
      "r267"
     ],
     "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\u00a0Capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis": {
     "auth_ref": [
      "r86",
      "r87",
      "r88",
      "r89"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of change in accounting principle. Excludes change from amendment to accounting standards.",
        "label": "Change in Accounting Principle, Type [Axis]",
        "terseLabel": "Adjustments for Change in Accounting Principle [Axis]"
       }
      }
     },
     "localname": "AdjustmentsForChangeInAccountingPrincipleAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsForErrorCorrectionDomain": {
     "auth_ref": [
      "r84",
      "r90",
      "r91",
      "r94",
      "r95",
      "r97",
      "r98"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of error correction.",
        "label": "Error Correction, Type [Domain]",
        "terseLabel": "Adjustments for Error Correction [Domain]"
       }
      }
     },
     "localname": "AdjustmentsForErrorCorrectionDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": {
     "auth_ref": [
      "r86",
      "r87",
      "r88",
      "r89",
      "r176",
      "r177",
      "r178",
      "r179",
      "r180",
      "r181",
      "r261",
      "r262",
      "r263",
      "r264",
      "r265",
      "r266",
      "r267",
      "r268",
      "r282",
      "r283",
      "r284",
      "r285",
      "r405",
      "r406",
      "r407",
      "r465",
      "r466",
      "r467",
      "r468",
      "r469",
      "r470",
      "r471",
      "r472",
      "r473",
      "r474",
      "r475",
      "r476"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by amendment to accounting standards.",
        "label": "Accounting Standards Update [Axis]",
        "terseLabel": "Adjustments for New Accounting Pronouncements [Axis]"
       }
      }
     },
     "localname": "AdjustmentsForNewAccountingPronouncementsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for restricted stock unit under share-based payment arrangement.",
        "label": "APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition",
        "terseLabel": "Amortization of nonvested common stock compensation"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts": {
     "auth_ref": [
      "r221",
      "r222"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.",
        "label": "Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs",
        "terseLabel": "Offering costs - common stock"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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 loss to net cash provided by operating activities:"
       }
      }
     },
     "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AllOtherSegmentsMember": {
     "auth_ref": [
      "r131",
      "r149",
      "r150",
      "r151",
      "r152",
      "r154"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Operating segments classified as other. Excludes intersegment elimination and reconciling items.",
        "label": "Other Segments [Member]",
        "terseLabel": "Other"
       }
      }
     },
     "localname": "AllOtherSegmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AllocatedShareBasedCompensationExpense": {
     "auth_ref": [
      "r252",
      "r259",
      "r269"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.",
        "label": "Share-based Payment Arrangement, Expense",
        "terseLabel": "Share-based payment arrangement expense"
       }
      }
     },
     "localname": "AllocatedShareBasedCompensationExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivable": {
     "auth_ref": [
      "r172",
      "r182",
      "r183",
      "r185"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on accounts receivable.",
        "label": "Accounts Receivable, Allowance for Credit Loss",
        "terseLabel": "Allowance for credit losses"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfDebtDiscountPremium": {
     "auth_ref": [
      "r44",
      "r62",
      "r357"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.",
        "label": "Amortization of Debt Discount (Premium)",
        "negatedLabel": "Amortization of discount/premium on mortgage loans payable"
       }
      }
     },
     "localname": "AmortizationOfDebtDiscountPremium",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfFinancingCosts": {
     "auth_ref": [
      "r39",
      "r62",
      "r359"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization expense attributable to debt issuance costs.",
        "label": "Amortization of Debt Issuance Costs",
        "terseLabel": "Amortization of debt issuance costs"
       }
      }
     },
     "localname": "AmortizationOfFinancingCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfIntangibleAssets": {
     "auth_ref": [
      "r62",
      "r190",
      "r196"
     ],
     "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": "Amortization of intangible assets"
       }
      }
     },
     "localname": "AmortizationOfIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r108"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.",
        "label": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount",
        "terseLabel": "Antidilutive securities excluded from computation of earnings per share"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": {
     "auth_ref": [
      "r108"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of antidilutive security.",
        "label": "Antidilutive Securities [Axis]",
        "terseLabel": "Antidilutive Securities [Axis]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems": {
     "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": "Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]",
        "terseLabel": "Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesNameDomain": {
     "auth_ref": [
      "r108"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.",
        "label": "Antidilutive Securities, Name [Domain]",
        "terseLabel": "Antidilutive Securities, Name [Domain]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AreaOfRealEstateProperty": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area of a real estate property.",
        "label": "Area of Real Estate Property",
        "terseLabel": "GLA (Sq Ft)"
       }
      }
     },
     "localname": "AreaOfRealEstateProperty",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "areaItemType"
    },
    "us-gaap_AssetManagement1Member": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Management of investment fund portfolio. Excludes investment advisory, distribution and servicing, and performance fee.",
        "label": "Asset Management [Member]",
        "terseLabel": "Asset Management [Member]"
       }
      }
     },
     "localname": "AssetManagement1Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r73",
      "r144",
      "r151",
      "r158",
      "r175",
      "r301",
      "r308",
      "r347",
      "r424",
      "r443"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "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",
        "terseLabel": "Total assets",
        "totalLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "ASSETS"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AwardTypeAxis": {
     "auth_ref": [
      "r254",
      "r260"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of award under share-based payment arrangement.",
        "label": "Award Type [Axis]",
        "terseLabel": "Award Type [Axis]"
       }
      }
     },
     "localname": "AwardTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "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": "Interim Unaudited Financial Data"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BuildingAndBuildingImprovementsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Facility held for productive use including, but not limited to, office, production, storage and distribution facilities and any addition, improvement, or renovation to the structure, for example, but not limited to, interior masonry, interior flooring, electrical, and plumbing.",
        "label": "Building and Building Improvements [Member]",
        "terseLabel": "Building and Building Improvements"
       }
      }
     },
     "localname": "BuildingAndBuildingImprovementsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAcquireeDomain": {
     "auth_ref": [
      "r246",
      "r249"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.",
        "label": "Business Acquisition, Acquiree [Domain]",
        "terseLabel": "Business Acquisition, Acquiree [Domain]"
       }
      }
     },
     "localname": "BusinessAcquisitionAcquireeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAxis": {
     "auth_ref": [
      "r246",
      "r249",
      "r295",
      "r296"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business combination or series of individually immaterial business combinations.",
        "label": "Business Acquisition [Axis]",
        "terseLabel": "Business Acquisition [Axis]"
       }
      }
     },
     "localname": "BusinessAcquisitionAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationAcquisitionRelatedCosts": {
     "auth_ref": [
      "r294"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 4.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.",
        "label": "Business Combination, Acquisition Related Costs",
        "terseLabel": "Acquisition related expenses"
       }
      }
     },
     "localname": "BusinessCombinationAcquisitionRelatedCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CapitalExpendituresIncurredButNotYetPaid": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.",
        "label": "Capital Expenditures Incurred but Not yet Paid",
        "terseLabel": "Accrued capital expenditures"
       }
      }
     },
     "localname": "CapitalExpendituresIncurredButNotYetPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r3",
      "r19",
      "r64"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "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",
        "periodEndLabel": "Cash and cash equivalents at end of period",
        "periodStartLabel": "Cash and cash equivalents at beginning of period",
        "terseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r57",
      "r64",
      "r69"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "periodEndLabel": "CASH, CASH EQUIVALENTS AND RESTRICTED CASH\u00a0\u2014 End of period",
        "periodStartLabel": "CASH, CASH EQUIVALENTS AND RESTRICTED CASH\u00a0\u2014 Beginning of period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect": {
     "auth_ref": [
      "r57",
      "r348"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding 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), Excluding Exchange Rate Effect",
        "totalLabel": "NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ChangeInAccountingPrincipleMember": {
     "auth_ref": [
      "r86",
      "r87",
      "r88",
      "r89"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Change in accounting principle. Excludes change from amendment to accounting standards.",
        "label": "Change in Accounting Principle, Type [Domain]",
        "terseLabel": "Adjustments for Change in Accounting Principle [Domain]"
       }
      }
     },
     "localname": "ChangeInAccountingPrincipleMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ClassOfStockDomain": {
     "auth_ref": [
      "r71",
      "r73",
      "r99",
      "r100",
      "r101",
      "r105",
      "r107",
      "r115",
      "r116",
      "r117",
      "r175",
      "r347"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/DocumentandEntityInformation",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r28",
      "r210",
      "r434",
      "r450"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "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"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]",
        "terseLabel": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r207",
      "r208",
      "r209",
      "r212"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CommitmentsandContingencies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockDividendsPerShareDeclared": {
     "auth_ref": [
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.",
        "label": "Common Stock, Dividends, Per Share, Declared",
        "terseLabel": "Distributions declared per Class T and Class I common share (in usd per share)"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareDeclared",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r82",
      "r83"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Class T and Class I Common Stock",
        "verboseLabel": "Class T and Class I Common Stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r12"
     ],
     "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 (usd per share)",
        "verboseLabel": "Par value of common stock to be offered and sold to the public"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r12"
     ],
     "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, shares authorized",
        "verboseLabel": "Number of shares of common stock, authorized to be issued"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r12"
     ],
     "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, shares, issued"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r12",
      "r221"
     ],
     "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, shares outstanding"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r12"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "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, $0.01 par value per share"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskDisclosureTextBlock": {
     "auth_ref": [
      "r130"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.",
        "label": "Concentration Risk Disclosure [Text Block]",
        "terseLabel": "Concentration of Credit Risk"
       }
      }
     },
     "localname": "ConcentrationRiskDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRisk"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConsolidationPolicyTextBlock": {
     "auth_ref": [
      "r70",
      "r303"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting.  The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.",
        "label": "Consolidation, Policy [Policy Text Block]",
        "terseLabel": "Basis of Presentation"
       }
      }
     },
     "localname": "ConsolidationPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock": {
     "auth_ref": [
      "r228"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.",
        "label": "Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]",
        "terseLabel": "Accounts Receivable, Net- Resident Fees and Services"
       }
      }
     },
     "localname": "ContractWithCustomerAssetAndLiabilityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractWithCustomerAssetNet": {
     "auth_ref": [
      "r226",
      "r227",
      "r231"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.",
        "label": "Contract with Customer, Asset, after Allowance for Credit Loss",
        "terseLabel": "Resident fees and services"
       }
      }
     },
     "localname": "ContractWithCustomerAssetNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostOfGoodsAndServicesSold": {
     "auth_ref": [
      "r42",
      "r403"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": 2.0,
       "parentTag": "gahr_Segmentnetoperatingincome",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.",
        "label": "Cost of Goods and Services Sold",
        "terseLabel": "Property operating expenses"
       }
      }
     },
     "localname": "CostOfGoodsAndServicesSold",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostsAndExpenses": {
     "auth_ref": [
      "r40"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 6.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total costs of sales and operating expenses for the period.",
        "label": "Costs and Expenses",
        "totalLabel": "Total expenses"
       }
      }
     },
     "localname": "CostsAndExpenses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostsAndExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Costs and Expenses [Abstract]",
        "terseLabel": "Expenses:"
       }
      }
     },
     "localname": "CostsAndExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Axis]",
        "terseLabel": "Credit Facility [Axis]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditFacilityDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.",
        "label": "Credit Facility [Domain]",
        "terseLabel": "Credit Facility [Domain]"
       }
      }
     },
     "localname": "CreditFacilityDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CurrentFederalTaxExpenseBenefit": {
     "auth_ref": [
      "r74",
      "r279",
      "r288"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Current Federal Tax Expense (Benefit)",
        "terseLabel": "Federal current"
       }
      }
     },
     "localname": "CurrentFederalTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CurrentStateAndLocalTaxExpenseBenefit": {
     "auth_ref": [
      "r74",
      "r279",
      "r288"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Current State and Local Tax Expense (Benefit)",
        "terseLabel": "State current"
       }
      }
     },
     "localname": "CurrentStateAndLocalTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentAxis": {
     "auth_ref": [
      "r6",
      "r7",
      "r8",
      "r425",
      "r427",
      "r440"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.",
        "label": "Debt Instrument [Axis]",
        "terseLabel": "Debt Instrument [Axis]"
       }
      }
     },
     "localname": "DebtInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.",
        "label": "Debt Instrument, Basis Spread on Variable Rate",
        "terseLabel": "Basis spread on variable rate"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentCarryingAmount": {
     "auth_ref": [
      "r8",
      "r215",
      "r427",
      "r440"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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",
        "terseLabel": "Mortgage loans payable, gross",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "DebtInstrumentCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentDescriptionOfVariableRateBasis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.",
        "label": "Debt Instrument, Description of Variable Rate Basis",
        "terseLabel": "Index"
       }
      }
     },
     "localname": "DebtInstrumentDescriptionOfVariableRateBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentInterestRateEffectivePercentage": {
     "auth_ref": [
      "r25",
      "r216",
      "r358"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.",
        "label": "Debt Instrument, Interest Rate, Effective Percentage",
        "terseLabel": "Effective interest rate"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateEffectivePercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentNameDomain": {
     "auth_ref": [
      "r26"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.",
        "label": "Debt Instrument, Name [Domain]",
        "terseLabel": "Debt Instrument, Name [Domain]"
       }
      }
     },
     "localname": "DebtInstrumentNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DeferredCostsLeasingAccumulatedAmortization": {
     "auth_ref": [
      "r363",
      "r366"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income.",
        "label": "Deferred Costs, Leasing, Accumulated Amortization",
        "terseLabel": "Deferred Costs, Leasing, Accumulated Amortization"
       }
      }
     },
     "localname": "DeferredCostsLeasingAccumulatedAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetPhantomDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredCostsLeasingNet": {
     "auth_ref": [
      "r363",
      "r364",
      "r366"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_OtherAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This element is net of accumulated amortization.",
        "label": "Deferred Costs, Leasing, Net",
        "terseLabel": "Lease commissions, net of accumulated amortization of $336,000 and $174,000 as of September 30, 2020 and December 31, 2019, respectively"
       }
      }
     },
     "localname": "DeferredCostsLeasingNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredFederalIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r74",
      "r280",
      "r288"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred Federal Income Tax Expense (Benefit)",
        "terseLabel": "Federal deferred"
       }
      }
     },
     "localname": "DeferredFederalIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredFinanceCostsNet": {
     "auth_ref": [
      "r22",
      "r359"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_OtherAssets",
       "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": "Deferred financing costs, net of accumulated amortization of $2,927,000 and $1,517,000 as of September 30, 2020 and December 31, 2019, respectively(1)"
       }
      }
     },
     "localname": "DeferredFinanceCostsNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredRentReceivablesNet": {
     "auth_ref": [
      "r31",
      "r362",
      "r365",
      "r366"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_OtherAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.",
        "label": "Deferred Rent Receivables, Net",
        "verboseLabel": "Deferred rent receivables"
       }
      }
     },
     "localname": "DeferredRentReceivablesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r74",
      "r280",
      "r288"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred State and Local Income Tax Expense (Benefit)",
        "terseLabel": "State deferred"
       }
      }
     },
     "localname": "DeferredStateAndLocalIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Depreciation": {
     "auth_ref": [
      "r62",
      "r200"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.",
        "label": "Depreciation",
        "terseLabel": "Depreciation"
       }
      }
     },
     "localname": "Depreciation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationAndAmortization": {
     "auth_ref": [
      "r62",
      "r200"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 5.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.",
        "label": "Depreciation, Depletion and Amortization, Nonproduction",
        "terseLabel": "Depreciation and amortization"
       }
      }
     },
     "localname": "DepreciationAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r62",
      "r139"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.",
        "label": "Depreciation, Depletion and Amortization",
        "terseLabel": "Depreciation and amortization"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet": {
     "auth_ref": [
      "r314"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.",
        "label": "Derivative Assets (Liabilities), at Fair Value, Net",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "DerivativeAssetsLiabilitiesAtFairValueNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeBasisSpreadOnVariableRate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.",
        "label": "Derivative, Basis Spread on Variable Rate",
        "terseLabel": "Interest Rate"
       }
      }
     },
     "localname": "DerivativeBasisSpreadOnVariableRate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DerivativeContractTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Contract [Domain]",
        "terseLabel": "Derivative Contract [Domain]"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r321",
      "r322",
      "r325",
      "r327"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument [Axis]",
        "terseLabel": "Derivative Instrument [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Derivative Instruments and Hedging Activities Disclosure [Abstract]",
        "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r332"
     ],
     "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]",
        "terseLabel": "Derivative Financial Instruments"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstruments"
     ],
     "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": "Derivative [Line Items]"
       }
      }
     },
     "localname": "DerivativeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeMaturityDates": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Date the derivative contract matures, in CCYY-MM-DD format.",
        "label": "Derivative, Maturity Date",
        "terseLabel": "Maturity Date"
       }
      }
     },
     "localname": "DerivativeMaturityDates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "dateItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r316",
      "r318"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "Derivative, Notional Amount",
        "terseLabel": "Notional\u00a0Amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeTable": {
     "auth_ref": [
      "r315",
      "r317",
      "r318",
      "r319",
      "r320",
      "r323",
      "r325",
      "r329",
      "r330",
      "r331"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule that describes and identifies a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.",
        "label": "Derivative [Table]",
        "terseLabel": "Derivative [Table]"
       }
      }
     },
     "localname": "DerivativeTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeTypeOfInstrument": {
     "auth_ref": [
      "r315",
      "r317",
      "r318"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Description of the type of derivative instrument, such as a swap, forward, and option. Excludes the underlying risk of the instrument.",
        "label": "Derivative, Type of Instrument",
        "terseLabel": "Instrument"
       }
      }
     },
     "localname": "DerivativeTypeOfInstrument",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DisaggregationOfRevenueTableTextBlock": {
     "auth_ref": [
      "r230"
     ],
     "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": "Disaggregation of Resident Fees and Services Revenue"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DividendsCommonStockCash": {
     "auth_ref": [
      "r222"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.",
        "label": "Dividends, Common Stock, Cash",
        "negatedLabel": "Dividends declared"
       }
      }
     },
     "localname": "DividendsCommonStockCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendsPayableCurrentAndNoncurrent": {
     "auth_ref": [
      "r7",
      "r9",
      "r426",
      "r444"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.",
        "label": "Dividends Payable",
        "terseLabel": "Distributions declared but not paid"
       }
      }
     },
     "localname": "DividendsPayableCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DueToAffiliateCurrentAndNoncurrent": {
     "auth_ref": [
      "r78",
      "r386",
      "r390",
      "r431",
      "r454",
      "r477"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.",
        "label": "Due to Affiliate",
        "terseLabel": "Due to Affiliate"
       }
      }
     },
     "localname": "DueToAffiliateCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DueToRelatedPartiesCurrentAndNoncurrent": {
     "auth_ref": [
      "r78",
      "r386",
      "r432",
      "r454"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "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": "Accounts payable due to affiliates"
       }
      }
     },
     "localname": "DueToRelatedPartiesCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarnestMoneyDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A deposit made by a purchaser of real estate to evidence good faith. It is customary for a buyer to give the seller earnest money at the time a sales contract is signed. The earnest money generally is credited to the down payment at closing, which is applied at closing as a component of payment against the purchase price.",
        "label": "Earnest Money Deposits",
        "terseLabel": "Real estate deposits"
       }
      }
     },
     "localname": "EarnestMoneyDeposits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Earnings Per Share [Abstract]",
        "terseLabel": "Earnings Per Share [Abstract]"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasicAndDiluted": {
     "auth_ref": [
      "r106"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements.  Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period.  Diluted earnings per share includes the amount of net income or 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, Basic and Diluted",
        "terseLabel": "Net loss per Class T and Class I common share attributable to controlling interest \u2014 basic and diluted"
       }
      }
     },
     "localname": "EarningsPerShareBasicAndDiluted",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r108",
      "r109",
      "r110",
      "r112"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]",
        "terseLabel": "Per Share Data"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareData"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Equity [Abstract]",
        "terseLabel": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r82",
      "r83",
      "r85",
      "r87",
      "r95",
      "r98",
      "r114",
      "r179",
      "r221",
      "r222",
      "r265",
      "r266",
      "r267",
      "r284",
      "r285",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r467",
      "r468",
      "r469"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]",
        "terseLabel": "Equity Component [Domain]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentDividendsOrDistributions": {
     "auth_ref": [
      "r37",
      "r56",
      "r62",
      "r455"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "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 of earnings from unconsolidated entity"
       }
      }
     },
     "localname": "EquityMethodInvestmentDividendsOrDistributions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityMethodInvestments": {
     "auth_ref": [
      "r20",
      "r145",
      "r174"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.",
        "label": "Equity Method Investments",
        "terseLabel": "Investment in unconsolidated entity"
       }
      }
     },
     "localname": "EquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis": {
     "auth_ref": [
      "r84",
      "r90",
      "r91",
      "r94",
      "r95",
      "r97",
      "r98"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of error correction.",
        "label": "Error Correction, Type [Axis]",
        "terseLabel": "Adjustments for Error Corrections [Axis]"
       }
      }
     },
     "localname": "ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EurodollarMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest rate based on U.S. dollar denominated deposits at foreign banks or foreign branches of U.S. banks.",
        "label": "Eurodollar [Member]",
        "terseLabel": "Eurodollar"
       }
      }
     },
     "localname": "EurodollarMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r333",
      "r334",
      "r335",
      "r340"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value, Recurring and Nonrecurring [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTextBlock": {
     "auth_ref": [
      "r333",
      "r344"
     ],
     "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 carrying amounts and estimated fair values of financial instruments"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r237",
      "r238",
      "r239",
      "r240",
      "r241",
      "r242",
      "r243",
      "r245",
      "r334",
      "r393",
      "r394",
      "r395"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]",
        "terseLabel": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByLiabilityClassAxis": {
     "auth_ref": [
      "r339",
      "r340"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by class of liability.",
        "label": "Liability Class [Axis]",
        "terseLabel": "Liability Class [Axis]"
       }
      }
     },
     "localname": "FairValueByLiabilityClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r333",
      "r334",
      "r336",
      "r337",
      "r342"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Measurement Frequency [Axis]",
        "terseLabel": "Measurement Frequency [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets": {
     "auth_ref": [
      "r313"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.",
        "label": "Fair Value, Concentration of Risk, Derivative Instruments, Assets",
        "terseLabel": "Derivative financial instruments"
       }
      }
     },
     "localname": "FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueConcentrationOfRiskFinancialLiabilitiesBalanceSheetGroupingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value, Concentration of Risk, Financial Liabilities, Balance Sheet Groupings [Abstract]",
        "terseLabel": "Carrying Amount(1)"
       }
      }
     },
     "localname": "FairValueConcentrationOfRiskFinancialLiabilitiesBalanceSheetGroupingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]",
        "terseLabel": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r339"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r237",
      "r238",
      "r243",
      "r245",
      "r334",
      "r393"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value, Inputs, Level 1 [Member]",
        "terseLabel": "Quoted\u00a0Prices\u00a0in Active\u00a0Markets\u00a0for Identical Assets and Liabilities (Level 1)"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r237",
      "r238",
      "r243",
      "r245",
      "r334",
      "r394"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value, Inputs, Level 2 [Member]",
        "terseLabel": "Significant\u00a0Other Observable\u00a0Inputs (Level 2)"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r237",
      "r238",
      "r239",
      "r240",
      "r241",
      "r242",
      "r243",
      "r245",
      "r334",
      "r395"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Inputs, Level 3 [Member]",
        "terseLabel": "Significant Unobservable Inputs (Level 3)"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTableTextBlock": {
     "auth_ref": [
      "r341"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of investments in certain entities that calculate net asset value per share or equivalent measured at fair value on a recurring or nonrecurring basis.",
        "label": "Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]",
        "terseLabel": "Schedule of historical and current estimated per share NAV"
       }
      }
     },
     "localname": "FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain": {
     "auth_ref": [
      "r338"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents classes of liabilities measured and disclosed at fair value.",
        "label": "Fair Value by Liability Class [Domain]",
        "terseLabel": "Fair Value by Liability Class [Domain]"
       }
      }
     },
     "localname": "FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement frequency.",
        "label": "Measurement Frequency [Domain]",
        "terseLabel": "Measurement Frequency [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r237",
      "r238",
      "r239",
      "r240",
      "r241",
      "r242",
      "r243",
      "r245",
      "r393",
      "r394",
      "r395"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Hierarchy and NAV [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r339",
      "r342"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Frequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, frequently measured at fair value.",
        "label": "Fair Value, Recurring [Member]",
        "terseLabel": "Fair Value, Recurring"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Financial Liabilities Fair Value Disclosure [Abstract]",
        "terseLabel": "Fair Value"
       }
      }
     },
     "localname": "FinancialLiabilitiesFairValueDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease": {
     "auth_ref": [
      "r170",
      "r186"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in allowance for credit loss on financing receivable.",
        "label": "Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)",
        "terseLabel": "Increase (decrease) in allowance for credit losses"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts": {
     "auth_ref": [
      "r169"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for charging off uncollectible financing receivables, including, but not limited to, factors and methodologies used in estimating the allowance for credit loss.",
        "label": "Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block]",
        "terseLabel": "Tenant and Resident Receivables and Allowances"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs": {
     "auth_ref": [
      "r171",
      "r184",
      "r187"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of writeoff of financing receivable, charged against allowance for credit loss.",
        "label": "Financing Receivable, Allowance for Credit Loss, Writeoff",
        "terseLabel": "Write-offs of allowance"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesWriteOffs",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetUsefulLife": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Finite-Lived Intangible Asset, Useful Life",
        "terseLabel": "Finite lived intangible asset, useful life"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetUsefulLife",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization": {
     "auth_ref": [
      "r195"
     ],
     "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",
        "terseLabel": "Intangible assets, accumulated amortization"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAccumulatedAmortization",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths": {
     "auth_ref": [
      "r197"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year One",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 6.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour": {
     "auth_ref": [
      "r197"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Four",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree": {
     "auth_ref": [
      "r197"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Three",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo": {
     "auth_ref": [
      "r197"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": 1.0,
       "parentTag": "us-gaap_FiniteLivedIntangibleAssetsGross",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Two",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": {
     "auth_ref": [
      "r191",
      "r192",
      "r195",
      "r198",
      "r404",
      "r408"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by major type or class of finite-lived intangible assets.",
        "label": "Finite-Lived Intangible Assets by Major Class [Axis]",
        "terseLabel": "Finite-Lived Intangible Assets by Major Class [Axis]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsGross": {
     "auth_ref": [
      "r195",
      "r408"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofAmortizationExpenseonIdentifiedIntangibleAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Finite-Lived Intangible Assets [Line Items]",
        "terseLabel": "Finite-Lived Intangible Assets [Line Items]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": {
     "auth_ref": [
      "r191",
      "r194"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.",
        "label": "Finite-Lived Intangible Assets, Major Class Name [Domain]",
        "terseLabel": "Finite-Lived Intangible Assets, Major Class Name [Domain]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsNet": {
     "auth_ref": [
      "r195",
      "r404"
     ],
     "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",
        "terseLabel": "Intangible assets"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Finite-Lived Intangible Assets, Net [Abstract]",
        "terseLabel": "Finite-Lived Intangible Assets, Net [Abstract]"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FurnitureAndFixturesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.",
        "label": "Furniture and Fixtures [Member]",
        "terseLabel": "Furniture, fixtures, and equipment"
       }
      }
     },
     "localname": "FurnitureAndFixturesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments": {
     "auth_ref": [
      "r321",
      "r324"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments.",
        "label": "Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments",
        "terseLabel": "Gain (loss) in fair value of derivative financial instruments",
        "verboseLabel": "Gain (loss) in fair value of derivative financial instruments"
       }
      }
     },
     "localname": "GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r43"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.",
        "label": "General and Administrative Expense",
        "terseLabel": "General and administrative"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HedgingDesignationAxis": {
     "auth_ref": [
      "r319",
      "r328"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by designation of purpose of derivative instrument.",
        "label": "Hedging Designation [Axis]",
        "terseLabel": "Hedging Designation [Axis]"
       }
      }
     },
     "localname": "HedgingDesignationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_HedgingDesignationDomain": {
     "auth_ref": [
      "r319"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Designation of purpose of derivative instrument.",
        "label": "Hedging Designation [Domain]",
        "terseLabel": "Hedging Designation [Domain]"
       }
      }
     },
     "localname": "HedgingDesignationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ImpairmentOfRealEstate": {
     "auth_ref": [
      "r62",
      "r203"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The charge against earnings in the period to reduce the carrying amount of real property to fair value.",
        "label": "Impairment of Real Estate",
        "negatedTerseLabel": "Impairment of real estate investments",
        "terseLabel": "Impairment of real estate investments"
       }
      }
     },
     "localname": "ImpairmentOfRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r36",
      "r144",
      "r150",
      "r154",
      "r157",
      "r160",
      "r421",
      "r436",
      "r439",
      "r457"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "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",
        "terseLabel": "Loss before income taxes",
        "totalLabel": "Loss before income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromEquityMethodInvestments": {
     "auth_ref": [
      "r37",
      "r62",
      "r141",
      "r174",
      "r435",
      "r455"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 4.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "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",
        "negatedTerseLabel": "Income from unconsolidated entity",
        "terseLabel": "(Loss) income from unconsolidated entity"
       }
      }
     },
     "localname": "IncomeLossFromEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Statement [Abstract]",
        "terseLabel": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Tax Disclosure [Abstract]",
        "terseLabel": "Income Tax Disclosure [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r273",
      "r274",
      "r278",
      "r286",
      "r289",
      "r291",
      "r292",
      "r293"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r74",
      "r97",
      "r98",
      "r142",
      "r272",
      "r287",
      "r290",
      "r458"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "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)",
        "negatedTerseLabel": "Income tax benefit (expense)",
        "terseLabel": "Total income tax (benefit) expense"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxPolicyTextBlock": {
     "auth_ref": [
      "r34",
      "r70",
      "r270",
      "r271",
      "r274",
      "r275",
      "r277",
      "r281",
      "r480"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.",
        "label": "Income Tax, Policy [Policy Text Block]",
        "terseLabel": "Income Taxes"
       }
      }
     },
     "localname": "IncomeTaxPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxesPaid": {
     "auth_ref": [
      "r59",
      "r65"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.",
        "label": "Income Taxes Paid",
        "terseLabel": "Income taxes"
       }
      }
     },
     "localname": "IncomeTaxesPaid",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.",
        "label": "Increase (Decrease) in Accounts and Other Receivables",
        "negatedLabel": "Accounts and other receivables"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsAndOtherReceivables",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.",
        "label": "Increase (Decrease) in Accounts Payable and Accrued Liabilities",
        "terseLabel": "Accounts payable and accrued liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayableAndAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the obligations due for goods and services provided by the following types of related parties: a parent company and its subsidiaries, subsidiaries of a common parent, an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.",
        "label": "Increase (Decrease) in Accounts Payable, Related Parties",
        "terseLabel": "Accounts payable due to affiliates"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayableRelatedParties",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Increase (Decrease) in Operating Capital [Abstract]",
        "terseLabel": "Changes in operating assets and liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in fair value of other financial instruments used in operating activities.",
        "label": "Increase (Decrease) in Other Financial Instruments Used in Operating Activities",
        "negatedTerseLabel": "Change in fair value of derivative financial instruments"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingLiabilities": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 13.0,
       "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": "Security deposits, prepaid rent, operating lease and other liabilities"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 10.0,
       "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",
        "negatedTerseLabel": "Other assets"
       }
      }
     },
     "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInStockholdersEquityRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Increase (Decrease) in Stockholders' Equity [Roll Forward]",
        "terseLabel": "Increase (Decrease) in Stockholders' Equity [Roll Forward]"
       }
      }
     },
     "localname": "IncreaseDecreaseInStockholdersEquityRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInTemporaryEquityRollForward": {
     "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 Temporary Equity [Roll Forward]",
        "terseLabel": "Changes in the carrying amount of redeemable noncontrolling interest [Roll Forward]"
       }
      }
     },
     "localname": "IncreaseDecreaseInTemporaryEquityRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IntangibleAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for all or part of the information related to intangible assets.",
        "label": "Intangible Assets Disclosure [Text Block]",
        "terseLabel": "Identified Intangible Assets, Net"
       }
      }
     },
     "localname": "IntangibleAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IntangibleAssetsNetExcludingGoodwill": {
     "auth_ref": [
      "r189",
      "r193"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 6.0,
       "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": "Identified intangible assets, net"
       }
      }
     },
     "localname": "IntangibleAssetsNetExcludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Intangible Assets, Net (Excluding Goodwill) [Abstract]",
        "terseLabel": "Intangible Assets, Net (Excluding Goodwill) [Abstract]"
       }
      }
     },
     "localname": "IntangibleAssetsNetExcludingGoodwillAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestAndOtherIncome": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 5.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).",
        "label": "Interest and Other Income",
        "terseLabel": "Other income"
       }
      }
     },
     "localname": "InterestAndOtherIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndOtherIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Interest and Other Income [Abstract]",
        "terseLabel": "Other income (expense):"
       }
      }
     },
     "localname": "InterestAndOtherIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestExpense": {
     "auth_ref": [
      "r35",
      "r138",
      "r356",
      "r359",
      "r438"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.",
        "label": "Interest Expense",
        "negatedTerseLabel": "Interest expense (including amortization of deferred\u00a0financing costs and debt discount/premium)"
       }
      }
     },
     "localname": "InterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r54",
      "r58",
      "r65"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Interest Paid, Excluding Capitalized Interest, Operating Activities",
        "terseLabel": "Interest"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LandMember": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Part of earth's surface not covered by water.",
        "label": "Land [Member]",
        "terseLabel": "Land"
       }
      }
     },
     "localname": "LandMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LeaseCostTableTextBlock": {
     "auth_ref": [
      "r377"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.",
        "label": "Lease, Cost [Table Text Block]",
        "terseLabel": "Schedule of lease cost"
       }
      }
     },
     "localname": "LeaseCostTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeaseExpirationDate1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Date which lease or group of leases is set to expire, in CCYY-MM-DD format.",
        "label": "Lease Expiration Date",
        "terseLabel": "Lease\u00a0Expiration Date"
       }
      }
     },
     "localname": "LeaseExpirationDate1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail"
     ],
     "xbrltype": "dateItemType"
    },
    "us-gaap_LeasesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Leases [Abstract]",
        "terseLabel": "Leases [Abstract]"
       }
      }
     },
     "localname": "LeasesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LeasesAcquiredInPlaceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired.",
        "label": "Leases, Acquired-in-Place [Member]",
        "terseLabel": "In-place leases"
       }
      }
     },
     "localname": "LeasesAcquiredInPlaceMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LesseeOperatingLeaseDescriptionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Lessee, Operating Lease, Description [Abstract]",
        "terseLabel": "Lessee, Operating Lease, Description [Abstract]"
       }
      }
     },
     "localname": "LesseeOperatingLeaseDescriptionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": {
     "auth_ref": [
      "r378"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.",
        "label": "Lessee, Operating Lease, Liability, Maturity [Table Text Block]",
        "terseLabel": "Schedule of operating lease liability"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails_1": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.",
        "label": "Lessee, Operating Lease, Liability, to be Paid",
        "totalLabel": "Total operating lease payments"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year One",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Four",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Three",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year Two",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.",
        "label": "Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r378"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails_1": {
       "order": 1.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.",
        "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount",
        "terseLabel": "Less: interest"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeasesTextBlock": {
     "auth_ref": [
      "r380"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.",
        "label": "Lessee, Operating Leases [Text Block]",
        "terseLabel": "Lessee, Operating Leases"
       }
      }
     },
     "localname": "LesseeOperatingLeasesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/Leases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceived": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payments to be received by lessor for operating lease.",
        "label": "Lessor, Operating Lease, Payments to be Received",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceived",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessor, Operating Lease, Payment to be Received, Year Four",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedFourYears",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedMaturityTableTextBlock": {
     "auth_ref": [
      "r382"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease.",
        "label": "Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]",
        "terseLabel": "Schedule of operating lease payments to be received"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedMaturityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessor, Operating Lease, Payment to be Received, Year One",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in remainder of current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessor, Operating Lease, Payment to be Received, Year Three",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedThreeYears",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears": {
     "auth_ref": [
      "r382"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_LessorOperatingLeasePaymentsToBeReceived",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lease payment to be received by lessor for operating lease in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Lessor, Operating Lease, Payment to be Received, Year Two",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LessorOperatingLeasePaymentsToBeReceivedTwoYears",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLessorFutureMinimumRentsDueDetails"
     ],
     "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": "Letters of credit outstanding"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r24",
      "r73",
      "r152",
      "r175",
      "r302",
      "r308",
      "r309",
      "r347"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities [Abstract]",
        "terseLabel": "Liabilities:"
       }
      }
     },
     "localname": "LiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r18",
      "r73",
      "r175",
      "r347",
      "r429",
      "r449"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "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, redeemable noncontrolling interests and equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "terseLabel": "LIABILITIES, REDEEMABLE NONCONTROLLING INTEREST AND EQUITY"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest": {
     "auth_ref": [
      "r117"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).",
        "label": "Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest",
        "terseLabel": "Percentage of ownership in operating partnership"
       }
      }
     },
     "localname": "LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest": {
     "auth_ref": [
      "r117"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).",
        "label": "Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest",
        "terseLabel": "Percentage of limited partnership interest"
       }
      }
     },
     "localname": "LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_LimitedPartnerMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Party to a partnership business who has limited liability.",
        "label": "Limited Partner [Member]",
        "terseLabel": "Limited Partner"
       }
      }
     },
     "localname": "LimitedPartnerMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LimitedPartnersCapitalAccountByClassAxis": {
     "auth_ref": [
      "r224"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type or class of limited partnership interests.",
        "label": "Limited Partners' Capital Account by Class [Axis]",
        "terseLabel": "Limited Partners' Capital Account by Class [Axis]"
       }
      }
     },
     "localname": "LimitedPartnersCapitalAccountByClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LimitedPartnersCapitalAccountClassDomain": {
     "auth_ref": [
      "r224"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Description of the type or class of limited partner's capital account.",
        "label": "Limited Partners' Capital Account, Class [Domain]",
        "terseLabel": "Limited Partners' Capital Account, Class [Domain]"
       }
      }
     },
     "localname": "LimitedPartnersCapitalAccountClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LineOfCredit": {
     "auth_ref": [
      "r8",
      "r427",
      "r440"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
        "label": "Long-term Line of Credit",
        "terseLabel": "Line of credit and term loans"
       }
      }
     },
     "localname": "LineOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Line of Credit Facility [Abstract]",
        "terseLabel": "Line of Credit Facility [Abstract]"
       }
      }
     },
     "localname": "LineOfCreditFacilityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding": {
     "auth_ref": [
      "r343"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of the amount outstanding under the credit facility.",
        "label": "Line of Credit Facility, Fair Value of Amount Outstanding",
        "terseLabel": "Line of credit and term loans"
       }
      }
     },
     "localname": "LineOfCreditFacilityFairValueOfAmountOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet": {
     "auth_ref": [
      "r77"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) of the credit facility.",
        "label": "Line of Credit Facility, Increase (Decrease), Net",
        "terseLabel": "Increase in credit facility"
       }
      }
     },
     "localname": "LineOfCreditFacilityIncreaseDecreaseForPeriodNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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": "Line of Credit Facility [Line Items]"
       }
      }
     },
     "localname": "LineOfCreditFacilityLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": {
     "auth_ref": [
      "r23"
     ],
     "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": "Line of credit facility, maximum borrowing capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityMaximumBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityTable": {
     "auth_ref": [
      "r23",
      "r76"
     ],
     "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]",
        "terseLabel": "Line of Credit Facility [Table]"
       }
      }
     },
     "localname": "LineOfCreditFacilityTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LineOfCreditMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars.",
        "label": "Line of Credit [Member]",
        "terseLabel": "Line of Credit"
       }
      }
     },
     "localname": "LineOfCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LoansPayableFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.",
        "label": "Loans Payable, Fair Value Disclosure",
        "terseLabel": "Mortgage loans payable"
       }
      }
     },
     "localname": "LoansPayableFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongLivedAssetsHeldForSaleNameDomain": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A name of the assets to be disposed.",
        "label": "Long Lived Assets Held-for-sale, Name [Domain]",
        "terseLabel": "Long Lived Assets Held-for-sale"
       }
      }
     },
     "localname": "LongLivedAssetsHeldForSaleNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths": {
     "auth_ref": [
      "r80",
      "r213"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 6.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Long-Term Debt, Maturity, Year One",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour": {
     "auth_ref": [
      "r80",
      "r213"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 3.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Long-Term Debt, Maturity, Year Four",
        "terseLabel": "2024"
       }
      }
     },
     "localname": "LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree": {
     "auth_ref": [
      "r80",
      "r213"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 4.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Long-Term Debt, Maturity, Year Three",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo": {
     "auth_ref": [
      "r80",
      "r213"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 5.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Long-Term Debt, Maturity, Year Two",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear": {
     "auth_ref": [
      "r80"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_DebtInstrumentCarryingAmount",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in remainder of current fiscal year.",
        "label": "Long-Term Debt, Maturity, Remainder of Fiscal Year",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayablePrincipalPaymentsDueonMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongtermDebtTypeAxis": {
     "auth_ref": [
      "r26"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of long-term debt.",
        "label": "Long-term Debt, Type [Axis]",
        "terseLabel": "Long-term Debt, Type [Axis]"
       }
      }
     },
     "localname": "LongtermDebtTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongtermDebtTypeDomain": {
     "auth_ref": [
      "r26",
      "r214"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.",
        "label": "Long-term Debt, Type [Domain]",
        "terseLabel": "Long-term Debt, Type [Domain]"
       }
      }
     },
     "localname": "LongtermDebtTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r30",
      "r73",
      "r175",
      "r347",
      "r428",
      "r448"
     ],
     "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": "Noncontrolling interest"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders": {
     "auth_ref": [
      "r222"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.",
        "label": "Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders",
        "negatedTerseLabel": "Distributions to noncontrolling interest"
       }
      }
     },
     "localname": "MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "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": "Noncontrolling limited partnership interest in operating partnership"
       }
      }
     },
     "localname": "MinorityInterestOwnershipPercentageByNoncontrollingOwners",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails"
     ],
     "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": "Noncontrolling interest, ownership percentage by parent"
       }
      }
     },
     "localname": "MinorityInterestOwnershipPercentageByParent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_MortgageNotesPayableDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for mortgage notes payable.",
        "label": "Mortgage Notes Payable Disclosure [Text Block]",
        "terseLabel": "Mortgage Loans Payable, Net"
       }
      }
     },
     "localname": "MortgageNotesPayableDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NatureOfOperations": {
     "auth_ref": [
      "r118",
      "r130"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.",
        "label": "Nature of Operations [Text Block]",
        "terseLabel": "Organization and Description of Business"
       }
      }
     },
     "localname": "NatureOfOperations",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusiness"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r57"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
       "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 financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "terseLabel": "CASH FLOWS FROM FINANCING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r57"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
       "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]",
        "terseLabel": "CASH FLOWS FROM INVESTING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r57",
      "r60",
      "r63"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "Net Cash Provided by (Used in) Operating Activities",
        "totalLabel": "Net cash provided by operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]",
        "terseLabel": "CASH FLOW FROM OPERATING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r2",
      "r32",
      "r33",
      "r38",
      "r63",
      "r73",
      "r86",
      "r90",
      "r91",
      "r92",
      "r93",
      "r97",
      "r98",
      "r103",
      "r144",
      "r150",
      "r154",
      "r157",
      "r160",
      "r175",
      "r347",
      "r437",
      "r456"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "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",
        "totalLabel": "Net loss attributable to controlling interest"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r32",
      "r33",
      "r97",
      "r98",
      "r305",
      "r311"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "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": "Less: net loss attributable to noncontrolling interests"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest": {
     "auth_ref": [
      "r41"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.",
        "label": "Net Income (Loss) Attributable to Redeemable Noncontrolling Interest",
        "terseLabel": "Net Loss Attributable to Redeemable Noncontrolling Interests"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToRedeemableNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "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": "Recently Issued Accounting Pronouncement"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. 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.",
        "label": "Noncash or Part Noncash Acquisition, Debt Assumed",
        "terseLabel": "Mortgage loan payable, net"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionDebtAssumed1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract]",
        "terseLabel": "The following represents the increase in certain assets and liabilities in connection with our acquisitions of real estate investments:"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets, classified as other, acquired in a noncash or part noncash acquisition.",
        "label": "Noncash or Part Noncash Acquisition, Other Assets Acquired",
        "terseLabel": "Other assets"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities, classified as other, assumed in acquiring a business or in consideration for an asset received in a noncash or part noncash acquisition.",
        "label": "Noncash or Part Noncash Acquisition, Other Liabilities Assumed",
        "terseLabel": "Security deposits and prepaid rent"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncashOrPartNoncashAcquisitionPayablesAssumed1": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of payables that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. 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.",
        "label": "Noncash or Part Noncash Acquisition, Payables Assumed",
        "terseLabel": "Accounts payable and accrued liabilities"
       }
      }
     },
     "localname": "NoncashOrPartNoncashAcquisitionPayablesAssumed1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance": {
     "auth_ref": [
      "r223",
      "r300",
      "r307"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.",
        "label": "Noncontrolling Interest, Increase from Subsidiary Equity Issuance",
        "terseLabel": "Contribution from noncontrolling interest"
       }
      }
     },
     "localname": "NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r82",
      "r83",
      "r85",
      "r222",
      "r297"
     ],
     "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": "Noncontrolling Interest"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NondesignatedMember": {
     "auth_ref": [
      "r319"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument not designated as hedging instrument under Generally Accepted Accounting Principles (GAAP).",
        "label": "Not Designated as Hedging Instrument [Member]",
        "terseLabel": "Not Designated as Hedging Instrument"
       }
      }
     },
     "localname": "NondesignatedMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NumberOfReportableSegments": {
     "auth_ref": [
      "r132"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.",
        "label": "Number of Reportable Segments",
        "terseLabel": "Number of reportable segments"
       }
      }
     },
     "localname": "NumberOfReportableSegments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_NumberOfStatesInWhichEntityOperates": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of states the entity operates in as of the balance sheet date.",
        "label": "Number of States in which Entity Operates",
        "terseLabel": "Number of states with more than ten percent of tenant annual base rent"
       }
      }
     },
     "localname": "NumberOfStatesInWhichEntityOperates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OffMarketLeaseUnfavorable": {
     "auth_ref": [
      "r27"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 7.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.",
        "label": "Off-market Lease, Unfavorable",
        "verboseLabel": "Identified intangible liabilities, net"
       }
      }
     },
     "localname": "OffMarketLeaseUnfavorable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingExpenseMember": {
     "auth_ref": [
      "r326"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing expenses associated with normal operations.",
        "label": "Operating Expense [Member]",
        "terseLabel": "Operating Expense [Member]"
       }
      }
     },
     "localname": "OperatingExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OperatingExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Operating Expenses [Abstract]",
        "terseLabel": "Operating Expenses"
       }
      }
     },
     "localname": "OperatingExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OperatingLeaseCost": {
     "auth_ref": [
      "r371",
      "r379"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.",
        "label": "Operating Lease, Cost",
        "terseLabel": "Operating lease cost"
       }
      }
     },
     "localname": "OperatingLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesComponentsofLeaseCostDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseExpense": {
     "auth_ref": [
      "r369"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "us-gaap_CostsAndExpenses",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": 1.0,
       "parentTag": "gahr_Segmentnetoperatingincome",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating lease expense. Excludes sublease income.",
        "label": "Operating Lease, Expense",
        "terseLabel": "Rental expenses"
       }
      }
     },
     "localname": "OperatingLeaseExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLeaseIncome": {
     "auth_ref": [
      "r113",
      "r381",
      "r383"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 3.0,
       "parentTag": "gahr_RevenuesandGovernmentGrantIncomeFromCARESAct",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.",
        "label": "Operating Lease, Lease Income",
        "terseLabel": "Real estate revenue",
        "verboseLabel": "Real estate revenue"
       }
      }
     },
     "localname": "OperatingLeaseLeaseIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/LeasesAdditionalInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r368"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails_1": {
       "order": 2.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "label": "Operating Lease, Liability",
        "terseLabel": "Present value of operating lease liabilities",
        "verboseLabel": "Operating lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/LeasesFutureMinimumRentPaymentsOperatingLeasesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r370",
      "r373"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.",
        "label": "Operating Lease, Payments",
        "terseLabel": "Operating cash outflows related to operating leases"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLeaseTermandDiscountRateDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r367"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 7.0,
       "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 right-of-use assets, net"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r376",
      "r379"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average discount rate for operating lease calculated at point in time.",
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "terseLabel": "Weighted average discount rate"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLeaseTermandDiscountRateDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r375",
      "r379"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Operating Lease, Weighted Average Remaining Lease Term",
        "terseLabel": "Weighted average remaining lease term (in years)"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLeaseTermandDiscountRateDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OperatingLeasesIncomeStatementLeaseRevenue": {
     "auth_ref": [
      "r362"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": 3.0,
       "parentTag": "gahr_Segmentnetoperatingincome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.",
        "label": "Operating Leases, Income Statement, Lease Revenue",
        "terseLabel": "Real estate revenue"
       }
      }
     },
     "localname": "OperatingLeasesIncomeStatementLeaseRevenue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasesOfLessorDisclosureTextBlock": {
     "auth_ref": [
      "r360",
      "r361",
      "r384"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for lessor's operating leases.",
        "label": "Lessor, Operating Leases [Text Block]",
        "terseLabel": "Lessor, Operating Leases"
       }
      }
     },
     "localname": "OperatingLeasesOfLessorDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/Leases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OperationsCommencedDate1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Date the operations of the entity commenced, in CCYY-MM-DD format.",
        "label": "Operations Commenced Date",
        "terseLabel": "Date of capitalization"
       }
      }
     },
     "localname": "OperationsCommencedDate1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "dateItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]",
        "terseLabel": "Organization, Consolidation and Presentation of Financial Statements [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherAssets": {
     "auth_ref": [
      "r5",
      "r423",
      "r442"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 8.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets classified as other.",
        "label": "Other Assets",
        "terseLabel": "Other assets, net",
        "totalLabel": "Other assets, net"
       }
      }
     },
     "localname": "OtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherAssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Assets [Abstract]",
        "terseLabel": "Other Assets [Abstract]"
       }
      }
     },
     "localname": "OtherAssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherAssetsDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets.",
        "label": "Other Assets Disclosure [Text Block]",
        "terseLabel": "Other Assets, Net"
       }
      }
     },
     "localname": "OtherAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r433"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 6.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities classified as other.",
        "label": "Other Liabilities",
        "terseLabel": "Security deposits, prepaid rent and other liabilities"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Noncash Investing and Financing Items [Abstract]",
        "terseLabel": "SUPPLEMENTAL DISCLOSURE OF NONCASH ACTIVITIES"
       }
      }
     },
     "localname": "OtherNoncashInvestingAndFinancingItemsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "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 Stockholders\u2019 Equity"
       }
      }
     },
     "localname": "ParentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic": {
     "auth_ref": [
      "r102",
      "r104"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.",
        "label": "Participating Securities, Distributed and Undistributed Earnings (Loss), Basic",
        "terseLabel": "Participating securities, distributed and undistributed earnings (loss), basic"
       }
      }
     },
     "localname": "ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions": {
     "auth_ref": [
      "r79"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net cash outflow or inflow from the amount given in advance to show intention to complete the acquisition piece of land, anything permanently fixed to it, including buildings, structures on it, and so forth.",
        "label": "Payments for (Proceeds from) Deposits on Real Estate Acquisitions",
        "negatedTerseLabel": "Real estate deposits"
       }
      }
     },
     "localname": "PaymentsForProceedsFromDepositsOnRealEstateAcquisitions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForRepurchaseOfCommonStock": {
     "auth_ref": [
      "r51"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow to reacquire common stock during the period.",
        "label": "Payments for Repurchase of Common Stock",
        "negatedLabel": "Repurchase of common stock"
       }
      }
     },
     "localname": "PaymentsForRepurchaseOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDividendsCommonStock": {
     "auth_ref": [
      "r51"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.",
        "label": "Payments of Ordinary Dividends, Common Stock",
        "negatedTerseLabel": "Distributions paid"
       }
      }
     },
     "localname": "PaymentsOfDividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfFinancingCosts": {
     "auth_ref": [
      "r53"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow for loan and debt issuance costs.",
        "label": "Payments of Financing Costs",
        "negatedTerseLabel": "Deferred financing costs"
       }
      }
     },
     "localname": "PaymentsOfFinancingCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfStockIssuanceCosts": {
     "auth_ref": [
      "r53"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow for cost incurred directly with the issuance of an equity security.",
        "label": "Payments of Stock Issuance Costs",
        "negatedLabel": "Payment of offering costs"
       }
      }
     },
     "localname": "PaymentsOfStockIssuanceCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAndDevelopRealEstate": {
     "auth_ref": [
      "r47"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow from the acquisition of a piece of land and anything permanently fixed to it, including buildings, structures on it and so forth, and payments to develop real estate assets by adding improvements on or to a parcel of land. Such improvements may include drainage, utilities, subdividing, access, buildings, and any combination of these elements. Including real estate intended to generate income for the owner; excluding real estate acquired for use by the owner.",
        "label": "Payments to Acquire and Develop Real Estate",
        "negatedTerseLabel": "Acquisitions of real estate investments"
       }
      }
     },
     "localname": "PaymentsToAcquireAndDevelopRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireEquityMethodInvestments": {
     "auth_ref": [
      "r46"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.",
        "label": "Payments to Acquire Equity Method Investments",
        "negatedLabel": "Investment in unconsolidated entity"
       }
      }
     },
     "localname": "PaymentsToAcquireEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment": {
     "auth_ref": [
      "r47"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow from the acquisition of or improvements to long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.",
        "label": "Payments to Acquire Other Property, Plant, and Equipment",
        "negatedLabel": "Capital expenditures"
       }
      }
     },
     "localname": "PaymentsToAcquireOtherPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToMinorityShareholders": {
     "auth_ref": [
      "r53"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.",
        "label": "Payments to Noncontrolling Interests",
        "negatedTerseLabel": "Distributions to noncontrolling interest"
       }
      }
     },
     "localname": "PaymentsToMinorityShareholders",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PlanNameAxis": {
     "auth_ref": [
      "r254",
      "r260"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by plan name for share-based payment arrangement.",
        "label": "Plan Name [Axis]",
        "terseLabel": "Plan Name [Axis]"
       }
      }
     },
     "localname": "PlanNameAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PlanNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Plan name for share-based payment arrangement.",
        "label": "Plan Name [Domain]",
        "terseLabel": "Plan Name [Domain]"
       }
      }
     },
     "localname": "PlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r11"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.",
        "label": "Preferred Stock, Par or Stated Value Per Share",
        "verboseLabel": "Preferred stock, par value (usd per share)"
       }
      }
     },
     "localname": "PreferredStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r11"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.",
        "label": "Preferred Stock, Shares Authorized",
        "terseLabel": "Preferred Stock, shares authorized"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesIssued": {
     "auth_ref": [
      "r11"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.",
        "label": "Preferred Stock, Shares Issued",
        "terseLabel": "Preferred stock, shares issued"
       }
      }
     },
     "localname": "PreferredStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesOutstanding": {
     "auth_ref": [
      "r11"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.",
        "label": "Preferred Stock, Shares Outstanding",
        "terseLabel": "Preferred stock, shares outstanding"
       }
      }
     },
     "localname": "PreferredStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockValue": {
     "auth_ref": [
      "r11"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Preferred Stock, Value, Issued",
        "terseLabel": "Preferred stock, $0.01\u00a0par value per share; 200,000,000\u00a0shares authorized; none issued and outstanding"
       }
      }
     },
     "localname": "PreferredStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrepaidExpenseAndOtherAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail": {
       "order": 2.0,
       "parentTag": "us-gaap_OtherAssets",
       "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, deposits and other assets"
       }
      }
     },
     "localname": "PrepaidExpenseAndOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetOtherAssetsNetDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital": {
     "auth_ref": [
      "r45",
      "r56"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.",
        "label": "Proceeds from Equity Method Investment, Distribution, Return of Capital",
        "terseLabel": "Distributions in excess of earnings from unconsolidated entity"
       }
      }
     },
     "localname": "ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStock": {
     "auth_ref": [
      "r48"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from the additional capital contribution to the entity.",
        "label": "Proceeds from Issuance of Common Stock",
        "terseLabel": "Proceeds from issuance of common stock"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan": {
     "auth_ref": [
      "r48"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from capital contributions to an entity associated with a dividend reinvestment plan.",
        "label": "Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan",
        "terseLabel": "Proceeds from issuance of common stock, dividend reinvestment plan"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLinesOfCredit": {
     "auth_ref": [
      "r49",
      "r77"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.",
        "label": "Proceeds from Lines of Credit",
        "terseLabel": "Borrowings under the line of credit and term loans"
       }
      }
     },
     "localname": "ProceedsFromLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromMinorityShareholders": {
     "auth_ref": [
      "r50"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.",
        "label": "Proceeds from Noncontrolling Interests",
        "terseLabel": "Contribution from noncontrolling interest"
       }
      }
     },
     "localname": "ProceedsFromMinorityShareholders",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r2",
      "r32",
      "r33",
      "r55",
      "r73",
      "r86",
      "r97",
      "r98",
      "r144",
      "r150",
      "r154",
      "r157",
      "r160",
      "r175",
      "r299",
      "r304",
      "r306",
      "r311",
      "r312",
      "r347",
      "r439"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "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",
        "terseLabel": "Net loss",
        "totalLabel": "Net loss"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r21",
      "r202"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.",
        "label": "Long-Lived Tangible Asset [Axis]",
        "terseLabel": "Long-Lived Tangible Asset [Axis]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentFairValueDisclosure": {
     "auth_ref": [
      "r333"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion 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, Fair Value Disclosure",
        "terseLabel": "Aggregate carrying value of assets"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r4",
      "r201"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "label": "Long-Lived Tangible Asset [Domain]",
        "terseLabel": "Long-Lived Tangible Asset [Domain]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RealEstateAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Real Estate [Abstract]",
        "terseLabel": "Real Estate [Abstract]"
       }
      }
     },
     "localname": "RealEstateAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RealEstateDisclosureTextBlock": {
     "auth_ref": [
      "r490",
      "r491",
      "r492",
      "r493",
      "r494"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for certain real estate investment financial statements, real estate investment trust operating support agreements, real estate owned, retail land sales, time share transactions, as well as other real estate related disclosures.",
        "label": "Real Estate Disclosure [Text Block]",
        "terseLabel": "Real Estate Investments, Net"
       }
      }
     },
     "localname": "RealEstateDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNet"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation": {
     "auth_ref": [
      "r451"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of depreciation for real estate property held for investment purposes.",
        "label": "Real Estate Investment Property, Accumulated Depreciation",
        "negatedTerseLabel": "Less: accumulated depreciation"
       }
      }
     },
     "localname": "RealEstateInvestmentPropertyAccumulatedDepreciation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestmentPropertyAtCost": {
     "auth_ref": [
      "r452"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.",
        "label": "Real Estate Investment Property, at Cost",
        "terseLabel": "Real estate investment, at cost"
       }
      }
     },
     "localname": "RealEstateInvestmentPropertyAtCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestmentPropertyNet": {
     "auth_ref": [
      "r452"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.",
        "label": "Real Estate Investment Property, Net",
        "terseLabel": "Real estate investments, net"
       }
      }
     },
     "localname": "RealEstateInvestmentPropertyNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstatePropertiesAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by ownership of the property.",
        "label": "Real Estate Property Ownership [Axis]",
        "terseLabel": "Real Estate Property Ownership [Axis]"
       }
      }
     },
     "localname": "RealEstatePropertiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RealEstatePropertiesDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents categories of ownership of real estate properties.",
        "label": "Real Estate Properties [Domain]",
        "terseLabel": "Real Estate Properties [Domain]"
       }
      }
     },
     "localname": "RealEstatePropertiesDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RealEstatePropertiesLineItems": {
     "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": "Real Estate Properties [Line Items]",
        "terseLabel": "Real Estate Properties [Line Items]"
       }
      }
     },
     "localname": "RealEstatePropertiesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock": {
     "auth_ref": [
      "r151",
      "r154"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of all significant reconciling items in the reconciliation of total assets from reportable segments to the entity's consolidated assets.",
        "label": "Reconciliation of Assets from Segment to Consolidated [Table Text Block]",
        "terseLabel": "Assets by Reportable Segment"
       }
      }
     },
     "localname": "ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity.",
        "label": "Redeemable Noncontrolling Interest, by Legal Entity [Table]",
        "terseLabel": "Redeemable Noncontrolling Interest, by Legal Entity [Table]"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestByLegalEntityTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RedeemableNoncontrollingInterestEquityFairValue": {
     "auth_ref": [
      "r217",
      "r218",
      "r219",
      "r220"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.",
        "label": "Redeemable Noncontrolling Interest, Equity, Fair Value",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance",
        "terseLabel": "Redeemable noncontrolling interests"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestEquityFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RedeemableNoncontrollingInterestLineItems": {
     "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": "Redeemable Noncontrolling Interest [Line Items]",
        "terseLabel": "Redeemable Noncontrolling Interests [Line Items]"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsRedeemableNoncontrollingInterestPhantomDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RedeemableNoncontrollingInterestTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity.",
        "label": "Redeemable Noncontrolling Interest [Table Text Block]",
        "terseLabel": "Redeemable Noncontrolling Interests"
       }
      }
     },
     "localname": "RedeemableNoncontrollingInterestTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RelatedPartyDomain": {
     "auth_ref": [
      "r244",
      "r385",
      "r386"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Related parties include affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Domain]",
        "terseLabel": "Related Party [Domain]"
       }
      }
     },
     "localname": "RelatedPartyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionAmountsOfTransaction": {
     "auth_ref": [
      "r385",
      "r389"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of transactions with related party during the financial reporting period.",
        "label": "Related Party Transaction, Amounts of Transaction",
        "terseLabel": "Related Party Transaction, Amounts of Transaction"
       }
      }
     },
     "localname": "RelatedPartyTransactionAmountsOfTransaction",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionAxis": {
     "auth_ref": [
      "r244",
      "r385",
      "r386",
      "r389"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of related party transaction.",
        "label": "Related Party Transaction [Axis]",
        "terseLabel": "Related Party Transaction [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionDomain": {
     "auth_ref": [
      "r244"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Transaction between related party.",
        "label": "Related Party Transaction [Domain]",
        "terseLabel": "Related Party Transaction [Domain]"
       }
      }
     },
     "localname": "RelatedPartyTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty": {
     "auth_ref": [
      "r385"
     ],
     "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",
        "verboseLabel": "Due to affiliate"
       }
      }
     },
     "localname": "RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionLineItems": {
     "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": "Related Party Transaction [Line Items]",
        "terseLabel": "Related Party Transaction [Line Items]"
       }
      }
     },
     "localname": "RelatedPartyTransactionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Related Party Transactions [Abstract]",
        "terseLabel": "Related Party Transactions [Abstract]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": {
     "auth_ref": [
      "r244",
      "r385",
      "r389",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r417",
      "r418",
      "r419",
      "r420"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Axis]",
        "terseLabel": "Related Party [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsByRelatedPartyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RepaymentsOfLinesOfCredit": {
     "auth_ref": [
      "r52",
      "r77"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.",
        "label": "Repayments of Lines of Credit",
        "negatedTerseLabel": "Payments on the line of credit and term loans"
       }
      }
     },
     "localname": "RepaymentsOfLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfSecuredDebt": {
     "auth_ref": [
      "r52"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.",
        "label": "Repayments of Secured Debt",
        "negatedLabel": "Payments on mortgage loans payable",
        "negatedTerseLabel": "Scheduled principal payments on mortgage loans payable"
       }
      }
     },
     "localname": "RepaymentsOfSecuredDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedCash": {
     "auth_ref": [
      "r69",
      "r422",
      "r446"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.",
        "label": "Restricted Cash",
        "periodEndLabel": "Restricted cash at end of period",
        "periodStartLabel": "Restricted cash at beginning of period",
        "terseLabel": "Restricted cash"
       }
      }
     },
     "localname": "RestrictedCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedStockMember": {
     "auth_ref": [
      "r108"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met.",
        "label": "Restricted Stock [Member]",
        "terseLabel": "Restricted Stock"
       }
      }
     },
     "localname": "RestrictedStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r15",
      "r222",
      "r268",
      "r447",
      "r471",
      "r476"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "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": "Accumulated deficit"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r82",
      "r83",
      "r85",
      "r87",
      "r95",
      "r98",
      "r179",
      "r265",
      "r266",
      "r267",
      "r284",
      "r285",
      "r467",
      "r469"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Accumulated Deficit"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r135",
      "r136",
      "r149",
      "r155",
      "r156",
      "r162",
      "r163",
      "r166",
      "r229",
      "r230",
      "r403"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS": {
       "order": 1.0,
       "parentTag": "gahr_RevenuesandGovernmentGrantIncomeFromCARESAct",
       "weight": 1.0
      },
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail": {
       "order": 4.0,
       "parentTag": "gahr_Segmentnetoperatingincome",
       "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",
        "terseLabel": "Resident fees and services"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revenues [Abstract]",
        "terseLabel": "Revenues:"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RevolvingCreditFacilityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.",
        "label": "Revolving Credit Facility [Member]",
        "terseLabel": "Revolving Credit Facility"
       }
      }
     },
     "localname": "RevolvingCreditFacilityMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r374",
      "r379"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.",
        "label": "Right-of-Use Asset Obtained in Exchange for Operating Lease Liability",
        "terseLabel": "Right-of-use assets obtained in exchange for operating lease liabilities"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesLeaseTermandDiscountRateDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RisksAndUncertaintiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Risks and Uncertainties [Abstract]",
        "terseLabel": "Risks and Uncertainties [Abstract]"
       }
      }
     },
     "localname": "RisksAndUncertaintiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SaleOfStockNameOfTransactionDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sale of the entity's stock, including, but not limited to, initial public offering (IPO) and private placement.",
        "label": "Sale of Stock [Domain]",
        "terseLabel": "Sale of Stock, Name of Transaction [Domain]"
       }
      }
     },
     "localname": "SaleOfStockNameOfTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable": {
     "auth_ref": [
      "r108"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule for securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by Antidilutive Securities.",
        "label": "Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]",
        "terseLabel": "Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]"
       }
      }
     },
     "localname": "ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/PerShareDataDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": {
     "auth_ref": [
      "r281"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.",
        "label": "Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]",
        "terseLabel": "Schedule of Components of Income Tax Expense (Benefit)"
       }
      }
     },
     "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsTextBlock": {
     "auth_ref": [
      "r315",
      "r317",
      "r318",
      "r319",
      "r320",
      "r323",
      "r325",
      "r329",
      "r330"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.",
        "label": "Schedule of Derivative Instruments [Table Text Block]",
        "terseLabel": "Schedule of Derivative Instruments"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/DerivativeFinancialInstrumentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": {
     "auth_ref": [
      "r333",
      "r334"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]",
        "terseLabel": "Schedule of assets and liabilities measured at fair value"
       }
      }
     },
     "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/FairValueMeasurementsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable": {
     "auth_ref": [
      "r191",
      "r194",
      "r404"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "label": "Schedule of Finite-Lived Intangible Assets [Table]",
        "terseLabel": "Schedule of Finite-Lived Intangible Assets [Table]"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetIdentifiedIntangibleAssetsNetPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsSummaryofIdentifiedIntangiblesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock": {
     "auth_ref": [
      "r191",
      "r194"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.",
        "label": "Schedule of Finite-Lived Intangible Assets [Table Text Block]",
        "terseLabel": "Schedule of Finite-Lived Intangible Assets"
       }
      }
     },
     "localname": "ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock": {
     "auth_ref": [
      "r213"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of maturity and sinking fund requirement for long-term debt.",
        "label": "Schedule of Maturities of Long-term Debt [Table Text Block]",
        "terseLabel": "Schedule of Maturities of Long-term Debt"
       }
      }
     },
     "localname": "ScheduleOfMaturitiesOfLongTermDebtTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/MortgageLoansPayableNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfOtherAssetsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the carrying amounts of other assets. This disclosure includes other current assets and other noncurrent assets.",
        "label": "Schedule of Other Assets [Table Text Block]",
        "terseLabel": "Other Assets"
       }
      }
     },
     "localname": "ScheduleOfOtherAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/OtherAssetsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRealEstatePropertiesTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule detailing quantitative information concerning real estate properties and units within those properties by ownership of the property.",
        "label": "Schedule of Real Estate Properties [Table]",
        "terseLabel": "Schedule of Real Estate Properties [Table]"
       }
      }
     },
     "localname": "ScheduleOfRealEstatePropertiesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetInvestmentsinConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetSummaryofAcquisitionsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable": {
     "auth_ref": [
      "r75",
      "r387",
      "r389"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of quantitative and qualitative information pertaining to 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": "Schedule of Related Party Transactions, by Related Party [Table]",
        "terseLabel": "Schedule of Related Party Transactions, by Related Party [Table]"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsByRelatedPartyTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsScheduleofAmountOutstandingtoAffiliatesDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, 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": "Schedule of Related Party Transactions [Table Text Block]",
        "terseLabel": "Schedule of Related Party Transactions"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": {
     "auth_ref": [
      "r144",
      "r147",
      "r153",
      "r188"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table]",
        "terseLabel": "Schedule of Segment Reporting Information, by Segment [Table]"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": {
     "auth_ref": [
      "r144",
      "r147",
      "r153",
      "r188"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]",
        "terseLabel": "Summary Information by Reportable Segment"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock": {
     "auth_ref": [
      "r194"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.",
        "label": "Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]",
        "terseLabel": "Amortization expense on identified intangible assets"
       }
      }
     },
     "localname": "ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IdentifiedIntangibleAssetsNetTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock": {
     "auth_ref": [
      "r123",
      "r124",
      "r125",
      "r126",
      "r345",
      "r346"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.",
        "label": "Schedules of Concentration of Risk, by Risk Factor [Table Text Block]",
        "terseLabel": "Schedules of concentration risk"
       }
      }
     },
     "localname": "SchedulesOfConcentrationOfRiskByRiskFactorTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SecuredDebt": {
     "auth_ref": [
      "r8",
      "r427",
      "r445"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.",
        "label": "Secured Debt",
        "periodEndLabel": "Ending balance",
        "periodStartLabel": "Beginning balance",
        "terseLabel": "Mortgage loans payable, net",
        "verboseLabel": "Mortgage loans payable"
       }
      }
     },
     "localname": "SecuredDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/FairValueMeasurementsFairValuebyBalanceSheetGroupingDetails",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/MortgageLoansPayableNetMortgageLoansPayableDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [
      "r131",
      "r135",
      "r136",
      "r137",
      "r138",
      "r139",
      "r140",
      "r141",
      "r142",
      "r143",
      "r144",
      "r145",
      "r146",
      "r149",
      "r150",
      "r151",
      "r152",
      "r154",
      "r155",
      "r156",
      "r157",
      "r158",
      "r160",
      "r166",
      "r459"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Segments [Domain]",
        "terseLabel": "Segments [Domain]"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Segment Reporting [Abstract]",
        "terseLabel": "Segment Reporting [Abstract]"
       }
      }
     },
     "localname": "SegmentReportingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r131",
      "r133",
      "r134",
      "r144",
      "r148",
      "r154",
      "r158",
      "r159",
      "r160",
      "r161",
      "r162",
      "r165",
      "r166",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.",
        "label": "Segment Reporting Disclosure [Text Block]",
        "terseLabel": "Segment Reporting"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReporting"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingInformationAdditionalInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Segment Reporting Information, Additional Information [Abstract]",
        "terseLabel": "Assets by Reportable Segment"
       }
      }
     },
     "localname": "SegmentReportingInformationAdditionalInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Segment Reporting Information [Line Items]",
        "terseLabel": "Segment Reporting Information Line Items",
        "verboseLabel": "Concentration of Credit Risk"
       }
      }
     },
     "localname": "SegmentReportingInformationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentsGeographicalAreasAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Segments, Geographical Areas [Abstract]",
        "terseLabel": "Segments, Geographical Areas"
       }
      }
     },
     "localname": "SegmentsGeographicalAreasAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r61"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of noncash expense for share-based payment arrangement.",
        "label": "Share-based Payment Arrangement, Noncash Expense",
        "terseLabel": "Stock based compensation"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS",
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": {
     "auth_ref": [
      "r257"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period",
        "verboseLabel": "Issuance of vested and nonvested restricted common stock, shares"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized": {
     "auth_ref": [
      "r255"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares authorized for issuance under share-based payment arrangement.",
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized",
        "terseLabel": "Share-based compensation arrangement by share-based payment award, number of shares authorized"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": {
     "auth_ref": [
      "r251",
      "r256"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Award under share-based payment arrangement.",
        "label": "Award Type [Domain]",
        "terseLabel": "Award Type [Domain]"
       }
      }
     },
     "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SharePrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks of a company.",
        "label": "Share Price",
        "terseLabel": "Share price"
       }
      }
     },
     "localname": "SharePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharesIssued": {
     "auth_ref": [
      "r221"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.",
        "label": "Shares, Issued",
        "periodEndLabel": "Ending balance, Shares",
        "periodStartLabel": "Beginning balance, Shares",
        "terseLabel": "Shares issued"
       }
      }
     },
     "localname": "SharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r81"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.",
        "label": "Significant Accounting Policies [Text Block]",
        "terseLabel": "Significant Accounting Policies"
       }
      }
     },
     "localname": "SignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r0",
      "r131",
      "r135",
      "r136",
      "r137",
      "r138",
      "r139",
      "r140",
      "r141",
      "r142",
      "r143",
      "r144",
      "r145",
      "r146",
      "r149",
      "r150",
      "r151",
      "r152",
      "r154",
      "r155",
      "r156",
      "r157",
      "r158",
      "r160",
      "r166",
      "r188",
      "r204",
      "r205",
      "r206",
      "r459"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Segments [Axis]",
        "terseLabel": "Segments [Axis]"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskAdditionalInformationDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAdditionalInformationDetail",
      "http://www.griffincapital.com/role/SegmentReportingSummaryInformationforReportableSegmentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementClassOfStockAxis": {
     "auth_ref": [
      "r10",
      "r11",
      "r12",
      "r71",
      "r73",
      "r99",
      "r100",
      "r101",
      "r105",
      "r107",
      "r115",
      "r116",
      "r117",
      "r175",
      "r221",
      "r347"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by the different classes of stock of the entity.",
        "label": "Class of Stock [Axis]",
        "terseLabel": "Class of Stock [Axis]"
       }
      }
     },
     "localname": "StatementClassOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/DocumentandEntityInformation",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r29",
      "r82",
      "r83",
      "r85",
      "r87",
      "r95",
      "r98",
      "r114",
      "r179",
      "r221",
      "r222",
      "r265",
      "r266",
      "r267",
      "r284",
      "r285",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r467",
      "r468",
      "r469"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]",
        "terseLabel": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]",
        "terseLabel": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Financial Position [Abstract]",
        "terseLabel": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]",
        "terseLabel": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r82",
      "r83",
      "r85",
      "r114",
      "r403"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals",
      "http://www.griffincapital.com/role/ConcentrationofCreditRiskScheduleofAnnualizedBaseRentfromTenantsatConsolidatedPropertiesDetail",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/IdentifiedIntangibleLiabilitiesNetIdentifiedIntangibleLiabilitiesNetAdditionalInformationDetails",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail",
      "http://www.griffincapital.com/role/RealEstateInvestmentsNetAssetsandLiabilitiesAcquiredDetails",
      "http://www.griffincapital.com/role/SummaryofAccountingPoliciesDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableandDeferredRevenueDetails",
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssued1": {
     "auth_ref": [
      "r66",
      "r67",
      "r68"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The fair value of stock issued in noncash financing activities.",
        "label": "Stock Issued",
        "terseLabel": "Issuance of common stock under the DRIP"
       }
      }
     },
     "localname": "StockIssued1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan": {
     "auth_ref": [
      "r221"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.",
        "label": "Stock Issued During Period, Shares, Dividend Reinvestment Plan",
        "terseLabel": "Issuance of common stock under the DRIP, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesDividendReinvestmentPlan",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesNewIssues": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "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, shares",
        "verboseLabel": "Issuance of common stock, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).",
        "label": "Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture",
        "terseLabel": "Issuance of vested and nonvested restricted common stock, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockSplits": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares issued during the period as a result of a stock split.",
        "label": "Stock Issued During Period, Shares, Stock Splits",
        "terseLabel": "Stock issued during period, stock splits"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockSplits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/EquityPhantomDetails",
      "http://www.griffincapital.com/role/RedeemableNoncontrollingInterestsDetails"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan": {
     "auth_ref": [
      "r221"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity.",
        "label": "Stock Issued During Period, Value, Dividend Reinvestment Plan",
        "terseLabel": "Issuance of common stock under the DRIP"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueDividendReinvestmentPlan",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/OrganizationandDescriptionofBusinessDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueNewIssues": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.",
        "label": "Stock Issued During Period, Value, New Issues",
        "terseLabel": "Issuance of common stock"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueNewIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsRelatedPartyDescriptionDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation": {
     "auth_ref": [
      "r11",
      "r12",
      "r222",
      "r253",
      "r258"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).",
        "label": "Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture",
        "terseLabel": "Issuance of vested and nonvested restricted common stock"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockRepurchasedDuringPeriodShares": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.",
        "label": "Stock Repurchased During Period, Shares",
        "negatedTerseLabel": "Repurchase of common stock, shares"
       }
      }
     },
     "localname": "StockRepurchasedDuringPeriodShares",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockRepurchasedDuringPeriodValue": {
     "auth_ref": [
      "r11",
      "r12",
      "r221",
      "r222"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.",
        "label": "Stock Repurchased During Period, Value",
        "negatedTerseLabel": "Repurchase of common stock"
       }
      }
     },
     "localname": "StockRepurchasedDuringPeriodValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r12",
      "r16",
      "r17",
      "r73",
      "r173",
      "r175",
      "r347"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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 stockholders\u2019 equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders' Equity Attributable to Parent [Abstract]",
        "terseLabel": "Stockholders\u2019 equity:"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r73",
      "r82",
      "r83",
      "r85",
      "r87",
      "r95",
      "r175",
      "r179",
      "r222",
      "r265",
      "r266",
      "r267",
      "r284",
      "r285",
      "r297",
      "r298",
      "r310",
      "r347",
      "r349",
      "r350",
      "r354",
      "r468",
      "r469"
     ],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS": {
       "order": 4.0,
       "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",
        "verboseLabel": "Total equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS",
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityNoteDisclosureTextBlock": {
     "auth_ref": [
      "r72",
      "r222",
      "r225"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.",
        "label": "Stockholders' Equity Note Disclosure [Text Block]",
        "terseLabel": "Equity"
       }
      }
     },
     "localname": "StockholdersEquityNoteDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/Equity"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StraightLineRentAdjustments": {
     "auth_ref": [],
     "calculation": {
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the adjustment to rental revenues to measure escalating leasing revenues on a straight line basis.",
        "label": "Straight Line Rent Adjustments",
        "terseLabel": "Deferred rent"
       }
      }
     },
     "localname": "StraightLineRentAdjustments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [
      "r355",
      "r391"
     ],
     "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 Event [Member]"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r355",
      "r391"
     ],
     "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]",
        "terseLabel": "Subsequent Event Type [Axis]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r355",
      "r391"
     ],
     "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/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/EquityDetail",
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsidiarySaleOfStockAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of sale of the entity's stock.",
        "label": "Sale of Stock [Axis]",
        "terseLabel": "Subsidiary, Sale of Stock [Axis]"
       }
      }
     },
     "localname": "SubsidiarySaleOfStockAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/RelatedPartyTransactionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Supplemental Cash Flow Information [Abstract]",
        "terseLabel": "SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TimingOfTransferOfGoodOrServiceAxis": {
     "auth_ref": [
      "r230",
      "r235"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by timing of transfer of good or service to customer.",
        "label": "Timing of Transfer of Good or Service [Axis]",
        "terseLabel": "Timing of Transfer of Good or Service [Axis]"
       }
      }
     },
     "localname": "TimingOfTransferOfGoodOrServiceAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TimingOfTransferOfGoodOrServiceDomain": {
     "auth_ref": [
      "r230",
      "r235"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Timing of transfer of good or service to customer. Includes, but is not limited to, at point in time or over time.",
        "label": "Timing of Transfer of Good or Service [Domain]",
        "terseLabel": "Timing of Transfer of Good or Service [Domain]"
       }
      }
     },
     "localname": "TimingOfTransferOfGoodOrServiceDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransferredAtPointInTimeMember": {
     "auth_ref": [
      "r235"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract with customer in which good or service is transferred at point in time.",
        "label": "Transferred at Point in Time [Member]",
        "terseLabel": "Transferred at Point in Time"
       }
      }
     },
     "localname": "TransferredAtPointInTimeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransferredOverTimeMember": {
     "auth_ref": [
      "r235"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract with customer in which good or service is transferred over time.",
        "label": "Transferred over Time [Member]",
        "terseLabel": "Transferred over Time"
       }
      }
     },
     "localname": "TransferredOverTimeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesDisaggregationofRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TypeOfAdoptionMember": {
     "auth_ref": [
      "r86",
      "r87",
      "r88",
      "r89",
      "r176",
      "r177",
      "r178",
      "r179",
      "r180",
      "r181",
      "r261",
      "r262",
      "r263",
      "r264",
      "r265",
      "r266",
      "r267",
      "r268",
      "r282",
      "r283",
      "r284",
      "r285",
      "r405",
      "r406",
      "r407",
      "r465",
      "r466",
      "r467",
      "r468",
      "r469",
      "r470",
      "r471",
      "r472",
      "r473",
      "r474",
      "r475",
      "r476"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amendment to accounting standards.",
        "label": "Accounting Standards Update [Domain]",
        "terseLabel": "Type of Adoption [Domain]"
       }
      }
     },
     "localname": "TypeOfAdoptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYParentheticals"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r119",
      "r120",
      "r121",
      "r122",
      "r127",
      "r128",
      "r129"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.",
        "label": "Use of Estimates, Policy [Policy Text Block]",
        "terseLabel": "Use of Estimates"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/SummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount": {
     "auth_ref": [
      "r276"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.",
        "label": "Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount",
        "terseLabel": "Valuation allowance"
       }
      }
     },
     "localname": "ValuationAllowanceDeferredTaxAssetChangeInAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableLeaseCost": {
     "auth_ref": [
      "r372",
      "r379"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.",
        "label": "Variable Lease, Cost",
        "terseLabel": "Variable lease payments"
       }
      }
     },
     "localname": "VariableLeaseCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LeasesAdditionalInformationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]",
        "terseLabel": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VariableRateDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.",
        "label": "Variable Rate [Domain]",
        "terseLabel": "Variable Rate [Domain]"
       }
      }
     },
     "localname": "VariableRateDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/LineofCreditandTermLoanDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).",
        "label": "Weighted Average Number of Shares Outstanding, Basic and Diluted",
        "terseLabel": "Weighted average number of Class T and Class I common shares outstanding\u00a0\u2014 basic and diluted"
       }
      }
     },
     "localname": "WeightedAverageNumberOfShareOutstandingBasicAndDiluted",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.griffincapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"
     ],
     "xbrltype": "sharesItemType"
    }
   },
   "unitCount": 14
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(27))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1278-109256"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "55",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e2626-109256"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e2740-109256"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256"
  },
  "r107": {
   "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"
  },
  "r108": {
   "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"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e3842-109258"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "http://asc.fasb.org/topic&trid=2144383"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6828210&loc=d3e70229-108054"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r119": {
   "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"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r120": {
   "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"
  },
  "r121": {
   "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"
  },
  "r122": {
   "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"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6327-108592"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6442-108592"
  },
  "r127": {
   "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"
  },
  "r128": {
   "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"
  },
  "r129": {
   "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"
  },
  "r13": {
   "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=120391452&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "275",
   "URI": "http://asc.fasb.org/topic&trid=2134479"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "26",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "http://asc.fasb.org/topic&trid=2134510"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121593590&loc=d3e4647-111522"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a,b)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524"
  },
  "r173": {
   "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"
  },
  "r174": {
   "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"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(4)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "79",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r189": {
   "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"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.1)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r190": {
   "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"
  },
  "r191": {
   "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"
  },
  "r192": {
   "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"
  },
  "r193": {
   "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"
  },
  "r194": {
   "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"
  },
  "r195": {
   "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"
  },
  "r196": {
   "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"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(3)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r198": {
   "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"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "350",
   "URI": "http://asc.fasb.org/topic&trid=2144416"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.12)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r200": {
   "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"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r202": {
   "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"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "440",
   "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.14)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=SL6230698-112601"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(12)(c)",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(16)(c)",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "14",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.17)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "15",
   "Topic": "480",
   "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764"
  },
  "r221": {
   "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"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 4.F)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(b),22(b))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r237": {
   "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"
  },
  "r238": {
   "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"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r245": {
   "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"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(f)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)(iii)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)(1)(i)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r269": {
   "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"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.24)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32247-109318"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32280-109318"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32705-109319"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319"
  },
  "r276": {
   "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"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32857-109319"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460"
  },
  "r295": {
   "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"
  },
  "r296": {
   "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"
  },
  "r297": {
   "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"
  },
  "r298": {
   "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"
  },
  "r299": {
   "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"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684"
  },
  "r304": {
   "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"
  },
  "r305": {
   "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"
  },
  "r306": {
   "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"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.8)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4590271-111686"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "83",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121636179&loc=d3e34841-113949"
  },
  "r314": {
   "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"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41638-113959"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624181-113959"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41641-113959"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "25",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "815",
   "URI": "http://asc.fasb.org/topic&trid=2229140"
  },
  "r333": {
   "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"
  },
  "r334": {
   "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"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r337": {
   "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"
  },
  "r338": {
   "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"
  },
  "r339": {
   "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"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067"
  },
  "r340": {
   "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"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r348": {
   "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"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(210.5-03(11))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "Note 1",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121580752&loc=d3e38371-112697"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "Note 3",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121580752&loc=d3e38371-112697"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121549951&loc=d3e39896-112707"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121585684&loc=d3e40588-112709"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121585684&loc=d3e40246-112709"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121549951&loc=d3e39927-112707"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121598990&loc=d3e40879-112712"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977"
  },
  "r37": {
   "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=120395209&loc=SL114868664-224227"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/subtopic&trid=77888251"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121561866&loc=SL77919311-209978"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/subtopic&trid=77888252"
  },
  "r385": {
   "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"
  },
  "r386": {
   "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"
  },
  "r387": {
   "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"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(8))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "http://asc.fasb.org/extlink&oid=120604989&loc=d3e56071-112765"
  },
  "r391": {
   "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"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r40": {
   "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=120395209&loc=SL114868664-224227"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "http://asc.fasb.org/extlink&oid=119991564&loc=SL119991595-234733"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r408": {
   "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"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.19)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(1)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.2(a),(d))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(2)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447"
  },
  "r421": {
   "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"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(1)(a))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r426": {
   "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=120398452&loc=d3e534808-122878"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r428": {
   "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=120398452&loc=d3e534808-122878"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r43": {
   "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=120395209&loc=SL114868664-224227"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(1),(5))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(3))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r432": {
   "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=120398452&loc=d3e534808-122878"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r435": {
   "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=120399700&loc=SL114874048-224260"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.9)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r441": {
   "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=120400017&loc=d3e572229-122910"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(15)(5))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r448": {
   "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=120400017&loc=d3e572229-122910"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(3))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(d))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.15)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r454": {
   "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=120400017&loc=d3e572229-122910"
  },
  "r455": {
   "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=120400993&loc=SL114874131-224263"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r459": {
   "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"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819544-158441"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.6-04.12(3))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996"
  },
  "r478": {
   "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=120402547&loc=d3e617274-123014"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29)",
   "Topic": "948",
   "URI": "http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "740",
   "Topic": "954",
   "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column B))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column C))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column D))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column E))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column F))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column G))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column H))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column I))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r489": {
   "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=120402810&loc=d3e638233-123024"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "970",
   "URI": "http://asc.fasb.org/topic&trid=2156125"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "972",
   "URI": "http://asc.fasb.org/topic&trid=2134617"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "974",
   "URI": "http://asc.fasb.org/topic&trid=2156429"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "976",
   "URI": "http://asc.fasb.org/topic&trid=2134846"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "978",
   "URI": "http://asc.fasb.org/topic&trid=2134977"
  },
  "r495": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "308",
   "Subsection": "a"
  },
  "r496": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r497": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r498": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r499": {
   "Name": "Securities Act",
   "Number": "7A",
   "Publisher": "SEC",
   "Section": "B",
   "Subsection": "2"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3000-108585"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21D",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=SL94080555-108585"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(20))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r70": {
   "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"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(d))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(e)(1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(k))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(e),(f))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(f))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r78": {
   "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=120395691&loc=d3e23780-122690"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04.(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21914-107793"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21930-107793"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "27",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e22044-107793"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21711-107793"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(24))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1252-109256"
  }
 },
 "version": "2.1"
}
