{
 "instance": {
  "gva20220331_10q.htm": {
   "axisCustom": 0,
   "axisStandard": 38,
   "contextCount": 291,
   "dts": {
    "calculationLink": {
     "local": [
      "gva-20220331_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "gva-20220331_def.xml"
     ]
    },
    "inline": {
     "local": [
      "gva20220331_10q.htm"
     ]
    },
    "labelLink": {
     "local": [
      "gva-20220331_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "gva-20220331_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "gva-20220331.xsd"
     ],
     "remote": [
      "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/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.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",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-roles-2022.xsd",
      "https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd",
      "https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd",
      "https://xbrl.sec.gov/country/2022/country-2022.xsd",
      "https://xbrl.sec.gov/currency/2022/currency-2022.xsd",
      "https://xbrl.sec.gov/dei/2022/dei-2022.xsd",
      "https://xbrl.sec.gov/exch/2022/exch-2022.xsd",
      "https://xbrl.sec.gov/naics/2022/naics-2022.xsd",
      "https://xbrl.sec.gov/sic/2022/sic-2022.xsd",
      "https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd"
     ]
    }
   },
   "elementCount": 560,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2022": 63,
    "http://www.graniteconstruction.com/20220331": 6,
    "http://xbrl.sec.gov/dei/2022": 6,
    "total": 75
   },
   "keyCustom": 78,
   "keyStandard": 267,
   "memberCustom": 34,
   "memberStandard": 44,
   "nsprefix": "gva",
   "nsuri": "http://www.graniteconstruction.com/20220331",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "b",
       "p",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "000 - Document - Document And Entity Information",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information",
     "shortName": "Document And Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "b",
       "p",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "009 - Disclosure - Note 1 - Basis of Presentation",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
     "shortName": "Note 1 - Basis of Presentation",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "010 - Disclosure - Note 2 - Recently Issued and Adopted Accounting Pronouncements",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
     "shortName": "Note 2 - Recently Issued and Adopted Accounting Pronouncements",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "011 - Disclosure - Note 3 - Discontinued Operations",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
     "shortName": "Note 3 - Discontinued Operations",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:RevisionsInEstimatesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "012 - Disclosure - Note 4 - Revisions in Estimates",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
     "shortName": "Note 4 - Revisions in Estimates",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:RevisionsInEstimatesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:DisaggregationOfRevenueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "013 - Disclosure - Note 5 - Disaggregation of Revenue",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
     "shortName": "Note 5 - Disaggregation of Revenue",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:DisaggregationOfRevenueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "014 - Disclosure - Note 6 - Unearned Revenue",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
     "shortName": "Note 6 - Unearned Revenue",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "015 - Disclosure - Note 7 - Other Costs",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
     "shortName": "Note 7 - Other Costs",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "016 - Disclosure - Note 8 - Contract Assets and Liabilities",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
     "shortName": "Note 8 - Contract Assets and Liabilities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivablesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "017 - Disclosure - Note 9 - Receivables, Net",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
     "shortName": "Note 9 - Receivables, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivablesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "018 - Disclosure - Note 10 - Fair Value Measurement",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
     "shortName": "Note 10 - Fair Value Measurement",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
     "shortName": "Condensed Consolidated Balance Sheets (Current Period Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:MarketableSecuritiesCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ConstructionJointVenturesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "019 - Disclosure - Note 11 - Construction Joint Ventures",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
     "shortName": "Note 11 - Construction Joint Ventures",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ConstructionJointVenturesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "020 - Disclosure - Note 12 - Investments in Affiliates",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
     "shortName": "Note 12 - Investments in Affiliates",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "021 - Disclosure - Note 13 - Property and Equipment, Net",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
     "shortName": "Note 13 - Property and Equipment, Net",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherLiabilitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "022 - Disclosure - Note 14 - Accrued Expenses and Other Current Liabilities",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
     "shortName": "Note 14 - Accrued Expenses and Other Current Liabilities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherLiabilitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "023 - Disclosure - Note 15 - Long-term Debt and Credit Arrangements",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
     "shortName": "Note 15 - Long-term Debt and Credit Arrangements",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LongTermDebtTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "024 - Disclosure - Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
     "shortName": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "025 - Disclosure - Note 17 - Income Taxes",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
     "shortName": "Note 17 - Income Taxes",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LegalMattersAndContingenciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "026 - Disclosure - Note 18 - Contingencies - Legal Proceedings",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
     "shortName": "Note 18 - Contingencies - Legal Proceedings",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LegalMattersAndContingenciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "027 - Disclosure - Note 19 - Reportable Segment Information",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
     "shortName": "Note 19 - Reportable Segment Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "028 - Disclosure - Note 3 - Discontinued Operations (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
     "shortName": "Note 3 - Discontinued Operations (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
     "shortName": "Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "gva:DisaggregationOfRevenueTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "029 - Disclosure - Note 5 - Disaggregation of Revenue (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
     "shortName": "Note 5 - Disaggregation of Revenue (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "gva:DisaggregationOfRevenueTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ScheduleOfUnearnedRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "030 - Disclosure - Note 6 - Unearned Revenue (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
     "shortName": "Note 6 - Unearned Revenue (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ScheduleOfUnearnedRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "031 - Disclosure - Note 8 - Contract Assets and Liabilities (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
     "shortName": "Note 8 - Contract Assets and Liabilities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "032 - Disclosure - Note 9 - Receivables, Net (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables",
     "shortName": "Note 9 - Receivables, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "033 - Disclosure - Note 10 - Fair Value Measurement (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
     "shortName": "Note 10 - Fair Value Measurement (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "034 - Disclosure - Note 11 - Construction Joint Ventures (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
     "shortName": "Note 11 - Construction Joint Ventures (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "gva:ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EquityMethodInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "035 - Disclosure - Note 12 - Investments in Affiliates (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
     "shortName": "Note 12 - Investments in Affiliates (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EquityMethodInvestmentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "036 - Disclosure - Note 13 - Property and Equipment, Net (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
     "shortName": "Note 13 - Property and Equipment, Net (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PropertyPlantAndEquipmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:OtherLiabilitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "037 - Disclosure - Note 14 - Accrued Expenses and Other Current Liabilities (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
     "shortName": "Note 14 - Accrued Expenses and Other Current Liabilities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:OtherLiabilitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "038 - Disclosure - Note 15 - Long-term Debt and Credit Arrangements (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
     "shortName": "Note 15 - Long-term Debt and Credit Arrangements (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "003 - Statement - Condensed Consolidated Statements of Operations (Unaudited)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
     "shortName": "Condensed Consolidated Statements of Operations (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OperatingIncomeLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "039 - Disclosure - Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
     "shortName": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "040 - Disclosure - Note 17 - Income Taxes (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
     "shortName": "Note 17 - Income Taxes (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "041 - Disclosure - Note 19 - Reportable Segment Information (Tables)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
     "shortName": "Note 19 - Reportable Segment Information (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-4",
      "first": true,
      "lang": null,
      "name": "us-gaap:RetainedEarningsAccumulatedDeficit",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "042 - Disclosure - Note 2 - Recently Issued and Adopted Accounting Pronouncements (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
     "shortName": "Note 2 - Recently Issued and Adopted Accounting Pronouncements (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_ClassOfWarrantOrRightAxis-WarrantsIssuedWith275ConvertibleNotesMember",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USDPerShare",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "gva:ProceedsFromTheSaleOfDiscontinuedOperations",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "043 - Disclosure - Note 3 - Discontinued Operations (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
     "shortName": "Note 3 - Discontinued Operations (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-16_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis-InlinerMember",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock",
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis-WmsInlinerMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "044 - Disclosure - Note 3 - Discontinued Operations - Assets and Liabilities Held-for-sale (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
     "shortName": "Note 3 - Discontinued Operations - Assets and Liabilities Held-for-sale (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock",
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis-WmsInlinerMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "045 - Disclosure - Note 3 - Discontinued Operations - Discontinued Operations (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details",
     "shortName": "Note 3 - Discontinued Operations - Discontinued Operations (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:DisposalGroupIncludingDiscontinuedOperationsStatementOfOperations",
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis-WmsInlinerMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "046 - Disclosure - Note 3 - Discontinued Operations - Cash Flows for Discontinued Operations (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
     "shortName": "Note 3 - Discontinued Operations - Cash Flows for Discontinued Operations (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:DisposalGroupIncludingDiscontinuedOperationCashFlowsTableTextBlock",
       "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis-WmsInlinerMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DepreciationAndAmortizationDiscontinuedOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:GrossProfit",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "047 - Disclosure - Note 4 - Revisions in Estimates (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual",
     "shortName": "Note 4 - Revisions in Estimates (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "gva:RevisionsInEstimatesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_ChangeInAccountingEstimateByTypeAxis-RevisionsInEstimatesMember",
      "decimals": "-6",
      "lang": null,
      "name": "us-gaap:GrossProfit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "gva:DisaggregationOfRevenueTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "048 - Disclosure - Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
     "shortName": "Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "gva:DisaggregationOfRevenueTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
     "shortName": "Condensed Consolidated Statements of Comprehensive Income (Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnearnedRevenueTableTextBlock",
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "049 - Disclosure - Note 6 - Unearned Revenue (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
     "shortName": "Note 6 - Unearned Revenue (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis-RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis.domain-2022-04-01",
      "decimals": "-9",
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnearnedRevenueTableTextBlock",
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "050 - Disclosure - Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
     "shortName": "Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnearnedRevenueTableTextBlock",
       "gva:UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_StatementGeographicalAxis-CA",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueRemainingPerformanceObligation",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2021-01-01_2021-03-31_LitigationCaseAxis-PoliceRetirementSystemOfStLouisVGraniteConstructionIncorporatedEtAlMember",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LitigationSettlementExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "051 - Disclosure - Note 7 - Other Costs (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
     "shortName": "Note 7 - Other Costs (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2021-01-01_2021-03-31_LitigationCaseAxis-PoliceRetirementSystemOfStLouisVGraniteConstructionIncorporatedEtAlMember",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LitigationSettlementExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "gva:ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "052 - Disclosure - Note 8 - Contract Assets and Liabilities (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
     "shortName": "Note 8 - Contract Assets and Liabilities (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "gva:ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "gva:CostsInExcessOfBillingsAndEstimatedEarnings",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "053 - Disclosure - Note 8 - Contract Assets and Liabilities - Component of Contract Asset and Liability Balances (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
     "shortName": "Note 8 - Contract Assets and Liabilities - Component of Contract Asset and Liability Balances (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock",
       "us-gaap:RevenueFromContractWithCustomerTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "gva:CostsInExcessOfBillingsAndEstimatedEarnings",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "gva:WorkingCapitalDeficit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "054 - Disclosure - Note 9 - Receivables, Net (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual",
     "shortName": "Note 9 - Receivables, Net (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "gva:WorkingCapitalDeficit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccountsReceivableGrossCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "055 - Disclosure - Note 9 - Receivables, Net - Schedule of Receivables (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details",
     "shortName": "Note 9 - Receivables, Net - Schedule of Receivables (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "us-gaap:FinancingReceivablesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccountsReceivableGrossCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2018-05-31",
      "decimals": "-7",
      "first": true,
      "lang": null,
      "name": "us-gaap:DerivativeLiabilityNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "056 - Disclosure - Note 10 - Fair Value Measurement (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
     "shortName": "Note 10 - Fair Value Measurement (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2018-05-31",
      "decimals": "-7",
      "first": true,
      "lang": null,
      "name": "us-gaap:DerivativeLiabilityNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_FairValueByMeasurementFrequencyAxis-FairValueMeasurementsRecurringMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AssetsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "057 - Disclosure - Note 10 - Fair Value Measurement - Cash and Cash Equivalents (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
     "shortName": "Note 10 - Fair Value Measurement - Cash and Cash Equivalents (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_FairValueByMeasurementFrequencyAxis-FairValueMeasurementsRecurringMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AssetsFairValueDisclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_FairValueByFairValueHierarchyLevelAxis-FairValueInputsLevel1Member_FairValueByMeasurementBasisAxis-CarryingReportedAmountFairValueDisclosureMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:HeldToMaturitySecuritiesFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "058 - Disclosure - Note 10 - Fair Value Measurement - Schedule of Carrying and Fair Value Amounts (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
     "shortName": "Note 10 - Fair Value Measurement - Schedule of Carrying and Fair Value Amounts (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
       "us-gaap:FairValueDisclosuresTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_FairValueByFairValueHierarchyLevelAxis-FairValueInputsLevel1Member_FairValueByMeasurementBasisAxis-CarryingReportedAmountFairValueDisclosureMember",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:HeldToMaturitySecuritiesFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2020-12-31_StatementEquityComponentsAxis-CommonStockMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockSharesOutstanding",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "005 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited",
     "shortName": "Condensed Consolidated Statements of Shareholders' Equity (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2020-12-31_StatementEquityComponentsAxis-CommonStockMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockSharesOutstanding",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-9",
      "first": true,
      "lang": null,
      "name": "gva:ContractValueOfActiveConstructionJointVentureProjects",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "059 - Disclosure - Note 11 - Construction Joint Ventures (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
     "shortName": "Note 11 - Construction Joint Ventures (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-9",
      "first": true,
      "lang": null,
      "name": "gva:ContractValueOfActiveConstructionJointVentureProjects",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock",
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "gva:UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "060 - Disclosure - Note 11 - Construction Joint Ventures - Unconsolidated Construction Joint Ventures Financial Information (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
     "shortName": "Note 11 - Construction Joint Ventures - Unconsolidated Construction Joint Ventures Financial Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock",
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "gva:UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CostOfGoodsAndServicesSold",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "061 - Disclosure - Note 11 - Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
     "shortName": "Note 11 - Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:ScheduleOfUnconsolidatedJointVenturesRevenueAndCostsTableTextBlock",
       "gva:ConstructionJointVenturesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_TypeOfArrangementAxis-CollaborativeArrangementMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromCollaborativeArrangementExcludingRevenueFromContractWithCustomer",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "062 - Disclosure - Note 12 - Investments in Affiliates (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
     "shortName": "Note 12 - Investments in Affiliates (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis-RealEstateEntitiesMember",
      "decimals": "INF",
      "lang": null,
      "name": "gva:NumberOfEntities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:EquityMethodInvestmentsTextBlock",
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:EquityMethodInvestments",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "063 - Disclosure - Note 12 - Investments in Affiliates - Equity Method Investments (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
     "shortName": "Note 12 - Investments in Affiliates - Equity Method Investments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:EquityMethodInvestmentsTextBlock",
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis-RealEstateEntitiesMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:EquityMethodInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AssetsCurrent",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "064 - Disclosure - Note 12 - Investments in Affiliates - Summarized Balance Sheet Information for Equity Method Investments (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
     "shortName": "Note 12 - Investments in Affiliates - Summarized Balance Sheet Information for Equity Method Investments (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "gva:EquityMethodInvestmentSummarizedBalanceFinancialInformationTableTextBlock",
       "us-gaap:InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_EquityMethodInvestmentNonconsolidatedInvesteeAxis-EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AssetsCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "065 - Disclosure - Note 13 - Property and Equipment, Net - Property, Plant, and Equipment (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
     "shortName": "Note 13 - Property and Equipment, Net - Property, Plant, and Equipment (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:PropertyPlantAndEquipmentTextBlock",
       "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:PropertyPlantAndEquipmentGross",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
       "us-gaap:OtherLiabilitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccruedInsuranceCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "066 - Disclosure - Note 14 - Accrued Expenses and Other Current Liabilities - Accrued Expenses and Other Current Liabilities (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
     "shortName": "Note 14 - Accrued Expenses and Other Current Liabilities - Accrued Expenses and Other Current Liabilities (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock",
       "us-gaap:OtherLiabilitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AccruedInsuranceCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LongTermDebtCurrent",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "067 - Disclosure - Note 15 - Long-term Debt and Credit Arrangements (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
     "shortName": "Note 15 - Long-term Debt and Credit Arrangements (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31_DebtInstrumentAxis-TheCreditAgreementMember",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:LettersOfCreditOutstandingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LongTermDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "068 - Disclosure - Note 15 - Long-term Debt - Schedule of Long-term Debt (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
     "shortName": "Note 15 - Long-term Debt - Schedule of Long-term Debt (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfDebtInstrumentsTextBlock",
       "us-gaap:LongTermDebtTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LongTermDebt",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": null,
     "groupType": "statement",
     "isDefault": "false",
     "longName": "006 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited-parentheticals",
     "shortName": "Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2020-08-31_DebtInstrumentAxis-The275ConvertibleNotesMember_LongtermDebtTypeAxis-ConvertibleDebtMember",
      "decimals": "4",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtInstrumentInterestRateStatedPercentage",
      "reportCount": 1,
      "unitRef": "Pure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "069 - Disclosure - Note 15 - Long-term Debt - Schedule of Long-term Debt (Details) (Parentheticals)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
     "shortName": "Note 15 - Long-term Debt - Schedule of Long-term Debt (Details) (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis-RestrictedStockUnitsRSUMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "070 - Disclosure - Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
     "shortName": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis-RestrictedStockUnitsRSUMember",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Share",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeLossFromContinuingOperations",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "071 - Disclosure - Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share - Reconciliation of the Weighted Average Shares Outstanding in Basic and Diluted Net Loss per Share (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
     "shortName": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share - Reconciliation of the Weighted Average Shares Outstanding in Basic and Diluted Net Loss per Share (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncomeTaxExpenseBenefit",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "072 - Disclosure - Note 17 - Income Taxes - Schedule of (Benefit from) Provision for Income Taxes (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
     "shortName": "Note 17 - Income Taxes - Schedule of (Benefit from) Provision for Income Taxes (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
       "us-gaap:IncomeTaxDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "3",
      "lang": null,
      "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "Pure",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LegalMattersAndContingenciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LossContingencyAccrualAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "073 - Disclosure - Note 18 - Contingencies - Legal Proceedings (Details Textual)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
     "shortName": "Note 18 - Contingencies - Legal Proceedings (Details Textual)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LegalMattersAndContingenciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "i_2022-03-31",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "us-gaap:LossContingencyAccrualAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "074 - Disclosure - Note 19 - Reportable Segment Information - Segment Reporting Information (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
     "shortName": "Note 19 - Reportable Segment Information - Segment Reporting Information (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DepreciationAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:GrossProfit",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "075 - Disclosure - Note 19 - Reportable Segment Information - Reconciliation of Segment Gross (Loss) Profit to Consolidated Loss (Details)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
     "shortName": "Note 19 - Reportable Segment Information - Reconciliation of Segment Gross (Loss) Profit to Consolidated Loss (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unitRef": "USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "007 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
     "shortName": "Condensed Consolidated Statements of Cash Flows (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "td",
       "tr",
       "tbody",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "gva20220331_10q.htm",
      "contextRef": "d_2022-01-01_2022-03-31",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DepreciationDepletionAndAmortization",
      "reportCount": 1,
      "unique": true,
      "unitRef": "USD",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": null,
     "groupType": "statement",
     "isDefault": "false",
     "longName": "008 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)",
     "role": "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals",
     "shortName": "Condensed Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    }
   },
   "segmentCount": 80,
   "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"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "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"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentInformationLineItems": {
     "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": "Document Information [Line Items]"
       }
      }
     },
     "localname": "DocumentInformationLineItems",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "stringItemType"
    },
    "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]"
       }
      }
     },
     "localname": "DocumentInformationTable",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "xbrltype": "stringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r669"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r670"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "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]"
       }
      }
     },
     "localname": "EntityDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r671"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r667"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LegalEntityAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The set of legal entities associated with a report.",
        "label": "Legal Entity [Axis]"
       }
      }
     },
     "localname": "LegalEntityAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r666"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r668"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-document-and-entity-information"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "gva_AccruedExpensesAndOtherCurrentLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to accrued expenses and other current liabilities.",
        "label": "Accrued expenses and other current liabilities"
       }
      }
     },
     "localname": "AccruedExpensesAndOtherCurrentLiabilities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_AccruedLegalSettlementCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 4.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of the unpaid sum of the known accrued legal settlement.",
        "label": "Accrued legal settlement (see Note 18)"
       }
      }
     },
     "localname": "AccruedLegalSettlementCurrent",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_AdvancePaymentsAndBillingsInExcessOfCostsIncurred": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": 0.0,
       "parentTag": "us-gaap_ContractWithCustomerLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents advance payments and billings in excess of costs incurred.",
        "label": "Billings in excess of costs and estimated earnings, net of retention"
       }
      }
     },
     "localname": "AdvancePaymentsAndBillingsInExcessOfCostsIncurred",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_AffirmativeClaimRecoveryEstimate": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of affirmative claim recovery estimate.",
        "label": "gva_AffirmativeClaimRecoveryEstimate",
        "terseLabel": "Affirmative Claim Recovery Estimate"
       }
      }
     },
     "localname": "AffirmativeClaimRecoveryEstimate",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_AggregateAffirmativeClaimRecoveryEstimateIncludedInContractAssetAndLiability": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate affirmative claim recovery estimate included in contract asset and liability balances.",
        "label": "gva_AggregateAffirmativeClaimRecoveryEstimateIncludedInContractAssetAndLiability",
        "terseLabel": "Aggregate Affirmative Claim Recovery Estimate Included in Contract Asset and Liability"
       }
      }
     },
     "localname": "AggregateAffirmativeClaimRecoveryEstimateIncludedInContractAssetAndLiability",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_AsphaltTerminalEntityMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represent the asphalt terminal entity.",
        "label": "Asphalt Terminal Entity [Member]"
       }
      }
     },
     "localname": "AsphaltTerminalEntityMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_AssetsOfDisposalGroupIncludingDiscontinuedOperationsNoncurrentTotal": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 8.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of assets of disposal group, including discontinued operations, expected to be sold after a year.",
        "label": "gva_AssetsOfDisposalGroupIncludingDiscontinuedOperationsNoncurrentTotal",
        "terseLabel": "Noncurrent assets held-for-sale"
       }
      }
     },
     "localname": "AssetsOfDisposalGroupIncludingDiscontinuedOperationsNoncurrentTotal",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_BackChargeClaims": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of back charge claims.",
        "label": "gva_BackChargeClaims",
        "terseLabel": "Back Charge Claims"
       }
      }
     },
     "localname": "BackChargeClaims",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_BrightlineTrainsFloridaLLCMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents Brightline Trains Florida LLC.",
        "label": "Brightline Trains Florida LLC [Member]"
       }
      }
     },
     "localname": "BrightlineTrainsFloridaLLCMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_CashAndCashEquivalentsContinuingOperations": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash and cash equivalents held under continuing operations.",
        "label": "Cash and cash equivalents of continuing operations at end of period"
       }
      }
     },
     "localname": "CashAndCashEquivalentsContinuingOperations",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_CashPaidDuringPeriodForAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash paid during the period for:"
       }
      }
     },
     "localname": "CashPaidDuringPeriodForAbstract",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "gva_CentralMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents Central.",
        "label": "Central [Member]"
       }
      }
     },
     "localname": "CentralMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ChdjvMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents CHDJV.",
        "label": "CHDJV [Member]"
       }
      }
     },
     "localname": "ChdjvMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_CompanyOwnedLifeInsuranceNetIncomeLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) for company owned life insurance.",
        "label": "gva_CompanyOwnedLifeInsuranceNetIncomeLoss",
        "negatedLabel": "Net income from affiliates"
       }
      }
     },
     "localname": "CompanyOwnedLifeInsuranceNetIncomeLoss",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_CompletedAndInProgressMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to completed and in progress.",
        "label": "Completed and in Progress [Member]"
       }
      }
     },
     "localname": "CompletedAndInProgressMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ConsolidatedConstructionCorporateJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to consolidation construction corporate joint venture.",
        "label": "Consolidated Construction Corporate Joint Venture [Member]"
       }
      }
     },
     "localname": "ConsolidatedConstructionCorporateJointVentureMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ConsolidatedInterestCoverageRatioActual": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The actual consolidated interest coverage ratio.",
        "label": "gva_ConsolidatedInterestCoverageRatioActual",
        "terseLabel": "Consolidated Interest Coverage Ratio, Actual"
       }
      }
     },
     "localname": "ConsolidatedInterestCoverageRatioActual",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "gva_ConsolidatedLeverageRatioActual": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The actual consolidated leverage ratio.",
        "label": "gva_ConsolidatedLeverageRatioActual",
        "terseLabel": "Consolidated Leverage Ratio, Actual"
       }
      }
     },
     "localname": "ConsolidatedLeverageRatioActual",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "gva_ConsolidatedLeverageRatioCovenantMaximum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The maximum consolidated leverage ratio allowed under the covenant terms.",
        "label": "gva_ConsolidatedLeverageRatioCovenantMaximum",
        "terseLabel": "Consolidated Leverage Ratio, Covenant Maximum"
       }
      }
     },
     "localname": "ConsolidatedLeverageRatioCovenantMaximum",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "gva_ConstructionJointVenturesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for construction joint ventures.",
        "label": "Construction Joint Ventures [Text Block]"
       }
      }
     },
     "localname": "ConstructionJointVenturesTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_ConstructionsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents construction.",
        "label": "Constructions [Member]"
       }
      }
     },
     "localname": "ConstructionsMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ContractValueOfActiveConstructionJointVentureProjects": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of active contracts on construction joint venture projects.",
        "label": "gva_ContractValueOfActiveConstructionJointVentureProjects",
        "terseLabel": "Contract Value of Active Construction Joint Venture Projects"
       }
      }
     },
     "localname": "ContractValueOfActiveConstructionJointVentureProjects",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of revenue recognized including opening balance of contract with customer liability.",
        "label": "gva_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance",
        "terseLabel": "Contract With Customer Liability, Revenue Recognized Including Opening Balance"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_ContractWithCustomerRetention": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": 0.0,
       "parentTag": "us-gaap_ContractWithCustomerAssetNetCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of retention from contracts with customers.",
        "label": "Contract retention"
       }
      }
     },
     "localname": "ContractWithCustomerRetention",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_ConvertibleDebtInstrumentSharesPer1000OfPrincipalConverted": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares per $1,000 of principal converted of convertible debt instrument.",
        "label": "gva_ConvertibleDebtInstrumentSharesPer1000OfPrincipalConverted",
        "terseLabel": "Convertible Debt Instrument, Shares Per $1,000 of Principal Converted"
       }
      }
     },
     "localname": "ConvertibleDebtInstrumentSharesPer1000OfPrincipalConverted",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "gva_CostsInExcessOfBillingsAndEstimatedEarnings": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": 1.0,
       "parentTag": "us-gaap_ContractWithCustomerAssetNetCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents costs in excess of billings and estimated earnings.",
        "label": "Costs in excess of billings and estimated earnings"
       }
      }
     },
     "localname": "CostsInExcessOfBillingsAndEstimatedEarnings",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DebtInstrumentConvertiblePercentOfPrincipalAmountPotentiallyRepurchaseable": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percent of principal amount potentially repurchaseable for convertible debt instrument.",
        "label": "gva_DebtInstrumentConvertiblePercentOfPrincipalAmountPotentiallyRepurchaseable",
        "terseLabel": "Debt Instrument, Convertible, Percent of Principal Amount Potentially Repurchaseable"
       }
      }
     },
     "localname": "DebtInstrumentConvertiblePercentOfPrincipalAmountPotentiallyRepurchaseable",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "gva_DebtInstrumentConvertiblePercentOfSharePriceToConversionPriceTrigger": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percent of share price to conversion price trigger for convertible debt instrument.",
        "label": "gva_DebtInstrumentConvertiblePercentOfSharePriceToConversionPriceTrigger",
        "terseLabel": "Debt Instrument, Convertible, Percent of Share Price to Conversion Price, Trigger"
       }
      }
     },
     "localname": "DebtInstrumentConvertiblePercentOfSharePriceToConversionPriceTrigger",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "gva_DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatio": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The minimum consolidated interest coverage ratio under the debt instrument agreement.",
        "label": "gva_DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatio",
        "terseLabel": "Debt Instrument, Covenant, Minimum Consolidated Interest Coverage Ratio"
       }
      }
     },
     "localname": "DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatio",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "pureItemType"
    },
    "gva_DeficitsInUnconsolidatedJointVenturesCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 1.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the amount of deficits in unconsolidated joint ventures, due within one year or within the normal operating cycle if longer.",
        "label": "Deficits in unconsolidated construction joint ventures"
       }
      }
     },
     "localname": "DeficitsInUnconsolidatedJointVenturesCurrent",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DerivativeLiabilityNotionalAmountTerminated": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The notional amount terminated of derivative liability.",
        "label": "gva_DerivativeLiabilityNotionalAmountTerminated",
        "terseLabel": "Derivative Liability, Notional Amount Terminated"
       }
      }
     },
     "localname": "DerivativeLiabilityNotionalAmountTerminated",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DerivativeLiabilityNotionalAmountTerminatedPercent": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percent notional amount terminated of derivative liability.",
        "label": "gva_DerivativeLiabilityNotionalAmountTerminatedPercent",
        "terseLabel": "Derivative Liability, Notional Amount Terminated, Percent"
       }
      }
     },
     "localname": "DerivativeLiabilityNotionalAmountTerminatedPercent",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "gva_DisaggregationOfRevenueTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents disaggregation Of revenue.",
        "label": "Disaggregation Of Revenue [Text Block]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of information related to the assets and liabilities of a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.",
        "label": "Disposal Group, Including Discontinued Operation, Assets and Liabilities [Table Text Block]"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationAssetsAndLiabilitiesTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationCashFlowsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure related to a disposal group's cash flows. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.",
        "label": "Disposal Group, Including Discontinued Operation, Cash Flows [Table Text Block]"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationCashFlowsTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationCostOfRevenue": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of costs of revenue attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationCostOfRevenue",
        "terseLabel": "Cost of revenue"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationCostOfRevenue",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationGainOnSalesOfPropertyAndEquipment": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain on sales of property and equipment attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationGainOnSalesOfPropertyAndEquipment",
        "terseLabel": "Gain on sales of property and equipment, net"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationGainOnSalesOfPropertyAndEquipment",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationOtherCosts": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 4.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of other costs attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationOtherCosts",
        "terseLabel": "Other costs"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherCosts",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 1.0,
       "parentTag": "us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of other (income) expense attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet",
        "terseLabel": "Other income, net"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationPurchasesOfPropertyAndEquipment": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for purchases of property and equipment attributable to discontinued operations.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationPurchasesOfPropertyAndEquipment",
        "terseLabel": "Purchases of property and equipment"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationPurchasesOfPropertyAndEquipment",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpense": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 3.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of selling, general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpense",
        "terseLabel": "Selling, general and administrative expenses"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpense",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as assets classified as held-for-sale attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
        "totalLabel": "Total assets classified as held-for-sale"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsContractLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 0.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified contract liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsContractLiabilities",
        "verboseLabel": "Contract liabilities"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsContractLiabilities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsContractWithCustomerAsset": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 3.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as contract with customer asset attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsContractWithCustomerAsset",
        "verboseLabel": "Contract assets"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsContractWithCustomerAsset",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsInvestmentsInAffliates": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 0.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as investments in affiliates attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsInvestmentsInAffliates",
        "verboseLabel": "Investments in affiliates"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsInvestmentsInAffliates",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified liabilities held-for-sale attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
        "totalLabel": "Total liabilities classified as held-for-sale"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsNoncurrentLeaseLiabilities": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 2.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as noncurrent lease liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsNoncurrentLeaseLiabilities",
        "verboseLabel": "Long-term lease liabilities"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsNoncurrentLeaseLiabilities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsRightofuseAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 4.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as right-of-use assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "gva_DisposalGroupIncludingDiscontinuedOperationsRightofuseAssets",
        "verboseLabel": "Right of use assets"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsRightofuseAssets",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_DisposalGroupIncludingDiscontinuedOperationsStatementOfOperations": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of statement of operations information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.",
        "label": "Disposal Group, Including Discontinued Operations, Statement of Operations"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationsStatementOfOperations",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_DistributionsToNoncontrollingPartnersNet": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents net distributions to non-controlling partners.",
        "label": "gva_DistributionsToNoncontrollingPartnersNet",
        "negatedLabel": "Distributions to non-controlling partners"
       }
      }
     },
     "localname": "DistributionsToNoncontrollingPartnersNet",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_EnglishVRobertsEtAlMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to English v. Roberts et al.",
        "label": "English v. Roberts et al. [Member]"
       }
      }
     },
     "localname": "EnglishVRobertsEtAlMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_EquipmentAndVehiclesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents equipment and vehicles.",
        "label": "Equipment and Vehicles [Member]"
       }
      }
     },
     "localname": "EquipmentAndVehiclesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_EquityInConstructionJointVentures": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents equity in construction joint venture.",
        "label": "gva_EquityInConstructionJointVentures",
        "negatedLabel": "Contributions to unconsolidated construction joint ventures"
       }
      }
     },
     "localname": "EquityInConstructionJointVentures",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_EquityInConstructionJointVenturesCurrentAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents equity in construction joint ventures current assets.",
        "label": "Equity in construction joint ventures"
       }
      }
     },
     "localname": "EquityInConstructionJointVenturesCurrentAssets",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_EquityInConstructionJointVenturesCurrentAssetsExcludingDeficitInEquity": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Equity in construction joint ventures current assets excluding deficit in equity.",
        "label": "gva_EquityInConstructionJointVenturesCurrentAssetsExcludingDeficitInEquity",
        "terseLabel": "Equity in construction joint ventures"
       }
      }
     },
     "localname": "EquityInConstructionJointVenturesCurrentAssetsExcludingDeficitInEquity",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_EquityMethodInvestmentSummarizedBalanceFinancialInformationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The tabular disclosure of summarized balance financial information for equity method investments.",
        "label": "Equity Method Investment Summarized Balance Financial Information [Table Text Block]"
       }
      }
     },
     "localname": "EquityMethodInvestmentSummarizedBalanceFinancialInformationTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_GainLossOnSaleOfDiscontinuedOperations": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of gain (loss) on sale of discontinued operations.",
        "label": "gva_GainLossOnSaleOfDiscontinuedOperations",
        "terseLabel": "Gain (Loss) on Sale of Discontinued Operations"
       }
      }
     },
     "localname": "GainLossOnSaleOfDiscontinuedOperations",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_GuarantyLiabilitiesCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 3.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "This item represents a non-contingent liability for the fair value of an obligation to stand ready to perform over the term of a guaranty issued in the event that specified triggering events or conditions occur, which are expected to be paid in the next twelve months or in the normal operating cycle if longer .",
        "label": "Performance guarantees"
       }
      }
     },
     "localname": "GuarantyLiabilitiesCurrent",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_IncreaseDecreaseInAccrualForLegalSettlement": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 15.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents increase (decrease) in accrual for legal settlement.",
        "label": "Accrual for legal settlement (see Note 18)"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccrualForLegalSettlement",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_IncreaseDecreaseInInsuranceReceivableForLegalSettlement": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents increase (decrease) in insurance receivable for legal settlement.",
        "label": "gva_IncreaseDecreaseInInsuranceReceivableForLegalSettlement",
        "negatedLabel": "Deposit/insurance receivable for legal settlement (see Note 18)"
       }
      }
     },
     "localname": "IncreaseDecreaseInInsuranceReceivableForLegalSettlement",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_InlinerMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents Inliner.",
        "label": "Inliner [Member]"
       }
      }
     },
     "localname": "InlinerMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_InterestRateSwapsBalanceOfSwapsRemainingInOtherComprehensiveIncomeAmountToBeAmortizedQuarterlyToInterestExpense": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the balance of interest rate swaps remaining in other comprehensive income, which amount will be amortized quarterly to interest expense.",
        "label": "gva_InterestRateSwapsBalanceOfSwapsRemainingInOtherComprehensiveIncomeAmountToBeAmortizedQuarterlyToInterestExpense",
        "terseLabel": "Interest Rate Swaps, Balance of Swaps Remaining in Other Comprehensive Income, Amount to Be Amortized Quarterly to Interest Expense"
       }
      }
     },
     "localname": "InterestRateSwapsBalanceOfSwapsRemainingInOtherComprehensiveIncomeAmountToBeAmortizedQuarterlyToInterestExpense",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_LineItemJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents line item joint venture.",
        "label": "Line Item Joint Venture [Member]"
       }
      }
     },
     "localname": "LineItemJointVentureMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_LitigationSettlementSettlementFundAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount in settlement fund account related to litigation settlement.",
        "label": "gva_LitigationSettlementSettlementFundAmount",
        "terseLabel": "Litigation Settlement, Settlement Fund Amount"
       }
      }
     },
     "localname": "LitigationSettlementSettlementFundAmount",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_LoanToPartnerInJointVenturesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents loan to partner in one of unconsolidated joint ventures.",
        "label": "Loan to Partner in Joint Ventures [Member]"
       }
      }
     },
     "localname": "LoanToPartnerInJointVenturesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_LongtermDebtOther": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount or adjustment of other long-term debt.",
        "label": "gva_LongtermDebtOther",
        "verboseLabel": "Debt issuance costs and other"
       }
      }
     },
     "localname": "LongtermDebtOther",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_LossContingencyProceedsFromInsuranceRecovery": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Proceeds from insurance recovery related to a loss contingency.",
        "label": "gva_LossContingencyProceedsFromInsuranceRecovery",
        "terseLabel": "Loss Contingency, Proceeds From Insurance Recovery"
       }
      }
     },
     "localname": "LossContingencyProceedsFromInsuranceRecovery",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_MaterialSalesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to material sales.",
        "label": "Material Sales [Member]"
       }
      }
     },
     "localname": "MaterialSalesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_MaterialsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents materials.",
        "label": "Materials [Member]"
       }
      }
     },
     "localname": "MaterialsMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_MountainMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents Mountain.",
        "label": "Mountain [Member]"
       }
      }
     },
     "localname": "MountainMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_NoteToFinancialStatementDetailsTextual": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note To Financial Statement Details Textual"
       }
      }
     },
     "localname": "NoteToFinancialStatementDetailsTextual",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_NotesToFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Notes To Financial Statements [Abstract]"
       }
      }
     },
     "localname": "NotesToFinancialStatementsAbstract",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_NumberOfActiveJointVentureProjects": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of active joint venture projects.",
        "label": "gva_NumberOfActiveJointVentureProjects",
        "terseLabel": "Number of Active Joint Venture Projects"
       }
      }
     },
     "localname": "NumberOfActiveJointVentureProjects",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "integerItemType"
    },
    "gva_NumberOfEntities": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of entities.",
        "label": "gva_NumberOfEntities",
        "terseLabel": "Number of Entities"
       }
      }
     },
     "localname": "NumberOfEntities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "integerItemType"
    },
    "gva_OtherBusinessProductsAndServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to other business products and services.",
        "label": "Other Business Products and Services [Member]"
       }
      }
     },
     "localname": "OtherBusinessProductsAndServicesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_OtherIncomeExpenseMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents other income expense.",
        "label": "Other (Income) Expense [Member]"
       }
      }
     },
     "localname": "OtherIncomeExpenseMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_OtherPartnersInterestInPartnershipsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to other partners interest in partnerships.",
        "label": "Other Partners Interest in Partnerships [Member]"
       }
      }
     },
     "localname": "OtherPartnersInterestInPartnershipsMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_PaymentToContingencySettlementFund": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of payment to contingency settlement fund.",
        "label": "gva_PaymentToContingencySettlementFund",
        "terseLabel": "Payment to Contingency Settlement Fund"
       }
      }
     },
     "localname": "PaymentToContingencySettlementFund",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_PaymentsForProceedsFromNotesReceivableNetOfCollections": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) for proceeds received from or payments extending notes receivables, net of collections, during the reporting period.",
        "label": "gva_PaymentsForProceedsFromNotesReceivableNetOfCollections",
        "negatedLabel": "Issuance of notes receivable"
       }
      }
     },
     "localname": "PaymentsForProceedsFromNotesReceivableNetOfCollections",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_PercentageOfNetReceivablesIndividuallyMaximum": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents maximum individually percentage of net receivables.",
        "label": "gva_PercentageOfNetReceivablesIndividuallyMaximum",
        "terseLabel": "Percentage of Net Receivables, Individually, Maximum"
       }
      }
     },
     "localname": "PercentageOfNetReceivablesIndividuallyMaximum",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "gva_PerformanceObligationsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to performance obligations.",
        "label": "Performance Obligations [Member]"
       }
      }
     },
     "localname": "PerformanceObligationsMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_PoliceRetirementSystemOfStLouisVGraniteConstructionIncorporatedEtAlMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to litigation.",
        "label": "Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. [Member]"
       }
      }
     },
     "localname": "PoliceRetirementSystemOfStLouisVGraniteConstructionIncorporatedEtAlMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_PotentialLegalActionNotYetTakenAgainstTheCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information regarding legal action that has not yet been taken against the company but is believed by the company to be more likely than not to be taken in the future.",
        "label": "Potential Legal Action Not Yet Taken Against the Company [Member]"
       }
      }
     },
     "localname": "PotentialLegalActionNotYetTakenAgainstTheCompanyMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ProceedsFromTheSaleOfDiscontinuedOperations": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of proceeds from the sale of discontinued operations.",
        "label": "Proceeds from the sale of discontinued operations (see Note 3)",
        "terseLabel": "Proceeds From the Sale of Discontinued Operations"
       }
      }
     },
     "localname": "ProceedsFromTheSaleOfDiscontinuedOperations",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_RealEstateEntitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents real estate entities.",
        "label": "Real Estate Entities [Member]"
       }
      }
     },
     "localname": "RealEstateEntitiesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_RealEstateEntitiesOneMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to real estate entities.",
        "label": "Real Estate Entities One [Member]"
       }
      }
     },
     "localname": "RealEstateEntitiesOneMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_RealEstateEntitiesTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to real estate entities two.",
        "label": "Real Estate Entities Two [Member]"
       }
      }
     },
     "localname": "RealEstateEntitiesTwoMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_ReportingEntitysInterestInJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Related to the reporting entities interest in joint venture.",
        "label": "Reporting Entitys Interest in Joint Venture [Member]"
       }
      }
     },
     "localname": "ReportingEntitysInterestInJointVentureMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_RestrictedStockUnitsIssuedNetOfForfeitures": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the number of restricted stock units issued during the period, net of forfeitures.",
        "label": "RSUs issued, net of forfeitures"
       }
      }
     },
     "localname": "RestrictedStockUnitsIssuedNetOfForfeitures",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_RevisionsInEstimatesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to revisions in estimates.",
        "label": "Revisions in Estimates [Member]"
       }
      }
     },
     "localname": "RevisionsInEstimatesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_RevisionsInEstimatesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for revisions in estimates.",
        "label": "Revisions in Estimates [Text Block]"
       }
      }
     },
     "localname": "RevisionsInEstimatesTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The tabular disclosure of assets and liabilities of unconsolidated joint ventures.",
        "label": "Schedule of Unconsolidated Joint Ventures Assets and Liabilities [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfUnconsolidatedJointVenturesAssetsAndLiabilitiesTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_ScheduleOfUnconsolidatedJointVenturesRevenueAndCostsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of schedule of unconsolidated joint ventures revenues and costs.",
        "label": "Schedule of Unconsolidated Joint Ventures Revenue and Costs [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfUnconsolidatedJointVenturesRevenueAndCostsTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_ScheduleOfUnearnedRevenueTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of unearned revenue.",
        "label": "Schedule Of Unearned Revenue [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfUnearnedRevenueTableTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_SharesIssuedDuringPeriodStockbasedCompensationAndOther": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The number of shares issued during the period for stock-based compensation and other stockholders' equity transactions.",
        "label": "gva_SharesIssuedDuringPeriodStockbasedCompensationAndOther",
        "negatedLabel": "Stock-based compensation expense and other (in shares)"
       }
      }
     },
     "localname": "SharesIssuedDuringPeriodStockbasedCompensationAndOther",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "sharesItemType"
    },
    "gva_SteadfastInsuranceCompanySteadfastASubrogeeOfClarkhathawayDinwiddieAJointVentureChdjvVLayneChristensenCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "RRepresents Steadfast Insurance Company (\u201cSteadfast\u201d), a subrogee of Clark/Hathaway Dinwiddie, a Joint Venture (\u201cCHDJV\u201d) v. Layne Christensen Company.",
        "label": "Steadfast Insurance Company (\u201cSteadfast\u201d), a subrogee of Clark/Hathaway Dinwiddie, a Joint Venture (\u201cCHDJV\u201d) v. Layne Christensen Company [Member]"
       }
      }
     },
     "localname": "SteadfastInsuranceCompanySteadfastASubrogeeOfClarkhathawayDinwiddieAJointVentureChdjvVLayneChristensenCompanyMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_SteadfastMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents Steadfast Insurance Company.",
        "label": "Steadfast [Member]"
       }
      }
     },
     "localname": "SteadfastMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_StockIssuedDuringPeriodValueStockbasedCompensationAndOther": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The value of stock issued during the period for stock-based compensation and other stockholders equity transactions.",
        "label": "Stock-based compensation expense and other"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueStockbasedCompensationAndOther",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_TermLoanMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information pertaining to a term loan.",
        "label": "Term Loan [Member]"
       }
      }
     },
     "localname": "TermLoanMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_The275ConvertibleNotesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the 2.75% convertible notes.",
        "label": "The 2.75% Convertible Notes [Member]"
       }
      }
     },
     "localname": "The275ConvertibleNotesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_TheCreditAgreementMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to the credit agreement.",
        "label": "The Credit Agreement [Member]"
       }
      }
     },
     "localname": "TheCreditAgreementMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_UnconsolidatedConstructionCorporateJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to unconsolidated construction corporate joint venture.",
        "label": "Unconsolidated Construction Corporate Joint Venture [Member]"
       }
      }
     },
     "localname": "UnconsolidatedConstructionCorporateJointVentureMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of unconsolidated construction joint venture assets.",
        "label": "Unconsolidated construction joint venture assets"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureAssets",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureAssetsNoncurrentAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unconsolidated construction joint venture assets noncurrent assets.",
        "label": "gva_UnconsolidatedConstructionJointVentureAssetsNoncurrentAssets",
        "verboseLabel": "Noncurrent assets"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureAssetsNoncurrentAssets",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of unconsolidated construction joint venture cash, cash equivalents, and marketable securities.",
        "label": "gva_UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities",
        "verboseLabel": "Cash, cash equivalents and marketable securities"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureCurrentLiabilities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of unconsolidated construction joint venture current liabilities.",
        "label": "gva_UnconsolidatedConstructionJointVentureCurrentLiabilities",
        "verboseLabel": "Current liabilities"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureCurrentLiabilities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureGrossProfitLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unconsolidated construction joint venture gross profit loss.",
        "label": "gva_UnconsolidatedConstructionJointVentureGrossProfitLoss",
        "verboseLabel": "Granite\u2019s interest in gross profit (loss)"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureGrossProfitLoss",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureLiabilities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of unconsolidated construction joint venture liabilities.",
        "label": "Unconsolidated construction joint venture liabilities"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureLiabilities",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureNetIncomeLoss": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (loss) for proportionate share of unconsolidated construction joint venture.",
        "label": "gva_UnconsolidatedConstructionJointVentureNetIncomeLoss",
        "negatedLabel": "Equity in net (income) loss from unconsolidated joint ventures",
        "terseLabel": "Unconsolidated Construction Joint Venture Net Income (Loss)"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureNetIncomeLoss",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureNetProfitLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Unconsolidated construction joint venture net profit loss.",
        "label": "gva_UnconsolidatedConstructionJointVentureNetProfitLoss",
        "verboseLabel": "Granite\u2019s interest in net income (loss)"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureNetProfitLoss",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnconsolidatedConstructionJointVentureOtherCurrentAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of unconsolidated construction joint venture current assets, classified as other.",
        "label": "gva_UnconsolidatedConstructionJointVentureOtherCurrentAssets",
        "verboseLabel": "Other current assets"
       }
      }
     },
     "localname": "UnconsolidatedConstructionJointVentureOtherCurrentAssets",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents information related to unearned revenue from unsatisfied performance obligations.",
        "label": "Unearned Revenue From Unsatisfied Performance Obligations [Text Block]"
       }
      }
     },
     "localname": "UnearnedRevenueFromUnsatisfiedPerformanceObligationsTextBlock",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-"
     ],
     "xbrltype": "textBlockItemType"
    },
    "gva_WarrantsIssuedWith275ConvertibleNotesMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents warrants issued with the 2.75% convertible notes.",
        "label": "Warrants Issued With 2.75% Convertible Notes [Member]"
       }
      }
     },
     "localname": "WarrantsIssuedWith275ConvertibleNotesMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_WmsInlinerMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents WMS Inliner business.",
        "label": "WMS Inliner [Member]"
       }
      }
     },
     "localname": "WmsInlinerMember",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "domainItemType"
    },
    "gva_WorkingCapitalDeficit": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents the value of total current assets net of current liabilities as of the balance sheet date.",
        "label": "gva_WorkingCapitalDeficit",
        "terseLabel": "Working Capital (Deficit)"
       }
      }
     },
     "localname": "WorkingCapitalDeficit",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "gva_statement-statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 10 - Fair Value Measurement - Cash and Cash Equivalents (Details)"
       }
      }
     },
     "localname": "statement-statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 10 - Fair Value Measurement - Schedule of Carrying and Fair Value Amounts (Details)"
       }
      }
     },
     "localname": "statement-statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-10-fair-value-measurement-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 10 - Fair Value Measurement"
       }
      }
     },
     "localname": "statement-statement-note-10-fair-value-measurement-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 11 - Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details)"
       }
      }
     },
     "localname": "statement-statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-11-construction-joint-ventures-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 11 - Construction Joint Ventures"
       }
      }
     },
     "localname": "statement-statement-note-11-construction-joint-ventures-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 11 - Construction Joint Ventures - Unconsolidated Construction Joint Ventures Financial Information (Details)"
       }
      }
     },
     "localname": "statement-statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-12-investments-in-affiliates-equity-method-investments-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 12 - Investments in Affiliates - Equity Method Investments (Details)"
       }
      }
     },
     "localname": "statement-statement-note-12-investments-in-affiliates-equity-method-investments-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 12 - Investments in Affiliates - Summarized Balance Sheet Information for Equity Method Investments (Details)"
       }
      }
     },
     "localname": "statement-statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-12-investments-in-affiliates-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 12 - Investments in Affiliates"
       }
      }
     },
     "localname": "statement-statement-note-12-investments-in-affiliates-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-13-property-and-equipment-net-property-plant-and-equipment-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 13 - Property and Equipment, Net - Property, Plant, and Equipment (Details)"
       }
      }
     },
     "localname": "statement-statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-13-property-and-equipment-net-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 13 - Property and Equipment, Net"
       }
      }
     },
     "localname": "statement-statement-note-13-property-and-equipment-net-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 14 - Accrued Expenses and Other Current Liabilities - Accrued Expenses and Other Current Liabilities (Details)"
       }
      }
     },
     "localname": "statement-statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-14-accrued-expenses-and-other-current-liabilities-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 14 - Accrued Expenses and Other Current Liabilities"
       }
      }
     },
     "localname": "statement-statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-15-longterm-debt-and-credit-arrangements-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 15 - Long-term Debt and Credit Arrangements"
       }
      }
     },
     "localname": "statement-statement-note-15-longterm-debt-and-credit-arrangements-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-15-longterm-debt-schedule-of-longterm-debt-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 15 - Long-term Debt - Schedule of Long-term Debt (Details)"
       }
      }
     },
     "localname": "statement-statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 15 - Long-term Debt - Schedule of Long-term Debt (Details) (Parentheticals)"
       }
      }
     },
     "localname": "statement-statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share - Reconciliation of the Weighted Average Shares Outstanding in Basic and Diluted Net Loss per Share (Details)"
       }
      }
     },
     "localname": "statement-statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 16 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share"
       }
      }
     },
     "localname": "statement-statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 17 - Income Taxes - Schedule of (Benefit from) Provision for Income Taxes (Details)"
       }
      }
     },
     "localname": "statement-statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-17-income-taxes-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 17 - Income Taxes"
       }
      }
     },
     "localname": "statement-statement-note-17-income-taxes-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 19 - Reportable Segment Information - Reconciliation of Segment Gross (Loss) Profit to Consolidated Loss (Details)"
       }
      }
     },
     "localname": "statement-statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-19-reportable-segment-information-segment-reporting-information-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 19 - Reportable Segment Information - Segment Reporting Information (Details)"
       }
      }
     },
     "localname": "statement-statement-note-19-reportable-segment-information-segment-reporting-information-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-19-reportable-segment-information-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 19 - Reportable Segment Information"
       }
      }
     },
     "localname": "statement-statement-note-19-reportable-segment-information-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 3 - Discontinued Operations - Assets and Liabilities Held-for-sale (Details)"
       }
      }
     },
     "localname": "statement-statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 3 - Discontinued Operations - Cash Flows for Discontinued Operations (Details)"
       }
      }
     },
     "localname": "statement-statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-3-discontinued-operations-discontinued-operations-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 3 - Discontinued Operations - Discontinued Operations (Details)"
       }
      }
     },
     "localname": "statement-statement-note-3-discontinued-operations-discontinued-operations-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-3-discontinued-operations-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 3 - Discontinued Operations"
       }
      }
     },
     "localname": "statement-statement-note-3-discontinued-operations-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details)"
       }
      }
     },
     "localname": "statement-statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-5-disaggregation-of-revenue-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 5 - Disaggregation of Revenue"
       }
      }
     },
     "localname": "statement-statement-note-5-disaggregation-of-revenue-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details)"
       }
      }
     },
     "localname": "statement-statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-6-unearned-revenue-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 6 - Unearned Revenue"
       }
      }
     },
     "localname": "statement-statement-note-6-unearned-revenue-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 8 - Contract Assets and Liabilities - Component of Contract Asset and Liability Balances (Details)"
       }
      }
     },
     "localname": "statement-statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-8-contract-assets-and-liabilities-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 8 - Contract Assets and Liabilities"
       }
      }
     },
     "localname": "statement-statement-note-8-contract-assets-and-liabilities-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-9-receivables-net-schedule-of-receivables-details": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 9 - Receivables, Net - Schedule of Receivables (Details)"
       }
      }
     },
     "localname": "statement-statement-note-9-receivables-net-schedule-of-receivables-details",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "gva_statement-statement-note-9-receivables-net-tables": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Note 9 - Receivables, Net"
       }
      }
     },
     "localname": "statement-statement-note-9-receivables-net-tables",
     "nsuri": "http://www.graniteconstruction.com/20220331",
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidatedEntitiesAxis": {
     "auth_ref": [
      "r142",
      "r291",
      "r296",
      "r304",
      "r433",
      "r434",
      "r438",
      "r439",
      "r539",
      "r663"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidated Entities [Axis]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidatedEntitiesDomain": {
     "auth_ref": [
      "r142",
      "r291",
      "r296",
      "r304",
      "r433",
      "r434",
      "r438",
      "r439",
      "r539",
      "r663"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidated Entities [Domain]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidationEliminationsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidation, Eliminations [Member]"
       }
      }
     },
     "localname": "ConsolidationEliminationsMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidationItemsAxis": {
     "auth_ref": [
      "r142",
      "r190",
      "r203",
      "r204",
      "r205",
      "r206",
      "r208",
      "r210",
      "r214",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r298",
      "r299",
      "r301",
      "r303",
      "r304"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidation Items [Axis]"
       }
      }
     },
     "localname": "ConsolidationItemsAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidationItemsDomain": {
     "auth_ref": [
      "r142",
      "r190",
      "r203",
      "r204",
      "r205",
      "r206",
      "r208",
      "r210",
      "r214",
      "r291",
      "r292",
      "r293",
      "r294",
      "r295",
      "r296",
      "r298",
      "r299",
      "r301",
      "r303",
      "r304"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Consolidation Items [Domain]"
       }
      }
     },
     "localname": "ConsolidationItemsDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CounterpartyNameAxis": {
     "auth_ref": [
      "r72",
      "r74",
      "r140",
      "r141",
      "r311",
      "r336"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Counterparty Name [Axis]"
       }
      }
     },
     "localname": "CounterpartyNameAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember": {
     "auth_ref": [
      "r2",
      "r146",
      "r156",
      "r244",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r459",
      "r465",
      "r466",
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption, Adjusted Balance [Member]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember": {
     "auth_ref": [
      "r2",
      "r146",
      "r156",
      "r162",
      "r244",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r459",
      "r462",
      "r465",
      "r466",
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption, Adjustment [Member]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAdjustmentMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAxis": {
     "auth_ref": [
      "r2",
      "r146",
      "r156",
      "r162",
      "r244",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r459",
      "r462",
      "r465",
      "r466",
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption [Axis]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionDomain": {
     "auth_ref": [
      "r2",
      "r146",
      "r156",
      "r162",
      "r244",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r459",
      "r462",
      "r465",
      "r466",
      "r532"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption [Domain]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_EquityMethodInvesteeNameDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Name [Domain]"
       }
      }
     },
     "localname": "EquityMethodInvesteeNameDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_LitigationCaseAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Litigation Case [Axis]"
       }
      }
     },
     "localname": "LitigationCaseAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_LitigationCaseTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Litigation Case [Domain]"
       }
      }
     },
     "localname": "LitigationCaseTypeDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MajorCustomersAxis": {
     "auth_ref": [
      "r220",
      "r360",
      "r366",
      "r628"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Customer [Axis]"
       }
      }
     },
     "localname": "MajorCustomersAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r278",
      "r280",
      "r281",
      "r282",
      "r310",
      "r335",
      "r380",
      "r382",
      "r547",
      "r548",
      "r549",
      "r550",
      "r551",
      "r552",
      "r553",
      "r625",
      "r629",
      "r664",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum [Member]"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r278",
      "r280",
      "r281",
      "r282",
      "r310",
      "r335",
      "r380",
      "r382",
      "r547",
      "r548",
      "r549",
      "r550",
      "r551",
      "r552",
      "r553",
      "r625",
      "r629",
      "r664",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Minimum [Member]"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_NameOfMajorCustomerDomain": {
     "auth_ref": [
      "r220",
      "r360",
      "r366",
      "r628"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Customer [Domain]"
       }
      }
     },
     "localname": "NameOfMajorCustomerDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r216",
      "r280",
      "r281",
      "r360",
      "r364",
      "r555",
      "r624",
      "r626"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Product and Service [Axis]"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [
      "r216",
      "r280",
      "r281",
      "r360",
      "r364",
      "r555",
      "r624",
      "r626"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Product and Service [Domain]"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r271",
      "r278",
      "r280",
      "r281",
      "r282",
      "r310",
      "r335",
      "r369",
      "r380",
      "r382",
      "r385",
      "r386",
      "r387",
      "r547",
      "r548",
      "r549",
      "r550",
      "r551",
      "r552",
      "r553",
      "r625",
      "r629",
      "r664",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r271",
      "r278",
      "r280",
      "r281",
      "r282",
      "r310",
      "r335",
      "r369",
      "r380",
      "r382",
      "r385",
      "r386",
      "r387",
      "r547",
      "r548",
      "r549",
      "r550",
      "r551",
      "r552",
      "r553",
      "r625",
      "r629",
      "r664",
      "r665"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RepurchaseAgreementCounterpartyNameDomain": {
     "auth_ref": [
      "r73",
      "r74",
      "r140",
      "r141",
      "r311",
      "r336"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Counterparty Name [Domain]"
       }
      }
     },
     "localname": "RepurchaseAgreementCounterpartyNameDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis": {
     "auth_ref": [
      "r238"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investment, Name [Axis]"
       }
      }
     },
     "localname": "ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_SegmentGeographicalDomain": {
     "auth_ref": [
      "r217",
      "r218",
      "r360",
      "r365",
      "r627",
      "r654",
      "r655",
      "r656",
      "r657",
      "r658",
      "r659",
      "r660",
      "r661",
      "r662"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Domain]"
       }
      }
     },
     "localname": "SegmentGeographicalDomain",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_StatementGeographicalAxis": {
     "auth_ref": [
      "r217",
      "r218",
      "r360",
      "r365",
      "r627",
      "r649",
      "r654",
      "r655",
      "r656",
      "r657",
      "r658",
      "r659",
      "r660",
      "r661",
      "r662"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographical [Axis]"
       }
      }
     },
     "localname": "StatementGeographicalAxis",
     "nsuri": "http://fasb.org/srt/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "stringItemType"
    },
    "stpr_CA": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "CALIFORNIA"
       }
      }
     },
     "localname": "CA",
     "nsuri": "http://xbrl.sec.gov/stpr/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingStandardsUpdate202006Member": {
     "auth_ref": [
      "r456",
      "r457",
      "r458",
      "r459",
      "r460",
      "r461",
      "r462",
      "r464",
      "r465",
      "r466",
      "r467"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accounting Standards Update 2020-06 Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity.",
        "label": "Accounting Standards Update 2020-06 [Member]"
       }
      }
     },
     "localname": "AccountingStandardsUpdate202006Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.",
        "label": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
        "totalLabel": "Total"
       }
      }
     },
     "localname": "AccountsPayableAndAccruedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsPayableCurrent": {
     "auth_ref": [
      "r57",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accounts payable"
       }
      }
     },
     "localname": "AccountsPayableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableGrossCurrent": {
     "auth_ref": [
      "r26",
      "r46",
      "r222",
      "r223"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details": {
       "order": 1.0,
       "parentTag": "us-gaap_ReceivablesNetCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.",
        "label": "Gross receivables"
       }
      }
     },
     "localname": "AccountsReceivableGrossCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccountsReceivableMember": {
     "auth_ref": [
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Due from customers or clients for goods or services that have been delivered or sold.",
        "label": "Accounts Receivable [Member]"
       }
      }
     },
     "localname": "AccountsReceivableMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccruedInsuranceCurrent": {
     "auth_ref": [
      "r62"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 0.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Accrued insurance"
       }
      }
     },
     "localname": "AccruedInsuranceCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": {
     "auth_ref": [
      "r35",
      "r265"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details": {
       "order": 1.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.",
        "label": "Less: accumulated depreciation and depletion"
       }
      }
     },
     "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r49",
      "r78",
      "r79",
      "r80",
      "r606",
      "r637",
      "r641"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated other comprehensive income (loss)"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r77",
      "r80",
      "r88",
      "r89",
      "r90",
      "r143",
      "r144",
      "r145",
      "r437",
      "r534",
      "r632",
      "r633"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.",
        "label": "AOCI Attributable to Parent [Member]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapital": {
     "auth_ref": [
      "r47",
      "r542"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.",
        "label": "us-gaap_AdditionalPaidInCapital",
        "terseLabel": "Additional Paid in Capital, Total"
       }
      }
     },
     "localname": "AdditionalPaidInCapital",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r47"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.",
        "label": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r143",
      "r144",
      "r145",
      "r388",
      "r389",
      "r390",
      "r465"
     ],
     "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]"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": {
     "auth_ref": [
      "r0",
      "r1",
      "r2",
      "r3",
      "r4",
      "r149",
      "r150",
      "r151",
      "r153",
      "r162",
      "r227",
      "r228",
      "r241",
      "r242",
      "r243",
      "r244",
      "r247",
      "r248",
      "r388",
      "r389",
      "r390",
      "r402",
      "r403",
      "r404",
      "r405",
      "r421",
      "r422",
      "r423",
      "r456",
      "r457",
      "r458",
      "r459",
      "r460",
      "r461",
      "r462",
      "r464",
      "r465",
      "r466",
      "r467",
      "r468",
      "r488",
      "r489",
      "r490",
      "r491",
      "r492",
      "r493",
      "r497",
      "r498",
      "r508",
      "r509",
      "r516",
      "r517",
      "r518",
      "r519",
      "r528",
      "r530",
      "r531",
      "r532",
      "r533",
      "r534",
      "r556",
      "r557",
      "r558",
      "r630",
      "r631",
      "r632",
      "r633",
      "r634",
      "r635",
      "r636",
      "r637",
      "r638",
      "r639",
      "r640",
      "r641"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by amendment to accounting standards.",
        "label": "Accounting Standards Update [Axis]"
       }
      }
     },
     "localname": "AdjustmentsForNewAccountingPronouncementsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Adjustments to reconcile net loss to net cash provided by (used in) operating activities:"
       }
      }
     },
     "localname": "AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.",
        "label": "us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation",
        "negatedLabel": "Purchases of common stock (1)"
       }
      }
     },
     "localname": "AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings": {
     "auth_ref": [
      "r337",
      "r342"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of decrease in additional paid in capital (APIC) resulting from dividends legally declared (or paid) in excess of retained earnings balance.",
        "label": "us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings",
        "terseLabel": "Dividends on common stock ($0.13 per share)"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent": {
     "auth_ref": [
      "r53",
      "r224",
      "r249"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details": {
       "order": 0.0,
       "parentTag": "us-gaap_ReceivablesNetCurrent",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of allowance for credit loss on accounts receivable, classified as current.",
        "label": "Less: allowance for credit losses"
       }
      }
     },
     "localname": "AllowanceForDoubtfulAccountsReceivableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfDebtDiscountPremium": {
     "auth_ref": [
      "r109",
      "r127",
      "r323",
      "r511"
     ],
     "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": "us-gaap_AmortizationOfDebtDiscountPremium",
        "terseLabel": "Amortization of Debt Discount (Premium)"
       }
      }
     },
     "localname": "AmortizationOfDebtDiscountPremium",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfFinancingCostsAndDiscounts": {
     "auth_ref": [
      "r127",
      "r323",
      "r331",
      "r332",
      "r513"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.",
        "label": "Amortization related to long-term debt (see Note 15)"
       }
      }
     },
     "localname": "AmortizationOfFinancingCostsAndDiscounts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r175"
     ],
     "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": "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
        "terseLabel": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": {
     "auth_ref": [
      "r175"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of antidilutive security.",
        "label": "Antidilutive Securities [Axis]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesNameDomain": {
     "auth_ref": [
      "r175"
     ],
     "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]"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ArrangementsAndNonarrangementTransactionsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.",
        "label": "Collaborative Arrangement and Arrangement Other than Collaborative [Domain]"
       }
      }
     },
     "localname": "ArrangementsAndNonarrangementTransactionsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r38",
      "r136",
      "r198",
      "r205",
      "r212",
      "r239",
      "r291",
      "r292",
      "r293",
      "r295",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r433",
      "r438",
      "r487",
      "r540",
      "r542",
      "r578",
      "r602"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsNet",
       "weight": 1.0
      }
     },
     "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": "Segment assets",
        "terseLabel": "Assets, Total",
        "totalLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsCurrent": {
     "auth_ref": [
      "r27",
      "r56",
      "r136",
      "r239",
      "r291",
      "r292",
      "r293",
      "r295",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r433",
      "r438",
      "r487",
      "r540",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 0.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "us-gaap_AssetsCurrent",
        "terseLabel": "Current assets",
        "totalLabel": "Total current assets"
       }
      }
     },
     "localname": "AssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Current assets"
       }
      }
     },
     "localname": "AssetsCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsFairValueDisclosure": {
     "auth_ref": [
      "r472"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "us-gaap_AssetsFairValueDisclosure",
        "verboseLabel": "Total assets"
       }
      }
     },
     "localname": "AssetsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsNet": {
     "auth_ref": [
      "r22",
      "r643",
      "r644",
      "r646",
      "r647"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of net assets (liabilities).",
        "label": "us-gaap_AssetsNet",
        "totalLabel": "Net assets"
       }
      }
     },
     "localname": "AssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsNoncurrent": {
     "auth_ref": [
      "r136",
      "r239",
      "r291",
      "r292",
      "r293",
      "r295",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r433",
      "r438",
      "r487",
      "r540"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.",
        "label": "us-gaap_AssetsNoncurrent",
        "terseLabel": "Noncurrent assets"
       }
      }
     },
     "localname": "AssetsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r18",
      "r20",
      "r262",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "Current assets held-for-sale"
       }
      }
     },
     "localname": "AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BaseRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Minimum rate investor will accept.",
        "label": "Base Rate [Member]"
       }
      }
     },
     "localname": "BaseRateMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BilledContractReceivables": {
     "auth_ref": [
      "r554"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.",
        "label": "Billed"
       }
      }
     },
     "localname": "BilledContractReceivables",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "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]"
       }
      }
     },
     "localname": "BuildingAndBuildingImprovementsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CapitalExpendituresIncurredButNotYetPaid": {
     "auth_ref": [
      "r131",
      "r132",
      "r133"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.",
        "label": "Accrued equipment purchases"
       }
      }
     },
     "localname": "CapitalExpendituresIncurredButNotYetPaid",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CarryingReportedAmountFairValueDisclosureMember": {
     "auth_ref": [
      "r483",
      "r484"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as reported on the statement of financial position (balance sheet).",
        "label": "Reported Value Measurement [Member]"
       }
      }
     },
     "localname": "CarryingReportedAmountFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r24",
      "r32",
      "r129"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "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"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion 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.",
        "label": "us-gaap_CashAndCashEquivalentsFairValueDisclosure",
        "verboseLabel": "Cash equivalents"
       }
      }
     },
     "localname": "CashAndCashEquivalentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations": {
     "auth_ref": [
      "r123",
      "r129",
      "r134"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; attributable to disposal group, including, but not limited to, 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": "Less: Cash, cash equivalents and $1,512 in restricted cash included in current assets held-for-sale at end of each period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": {
     "auth_ref": [
      "r123",
      "r129",
      "r134"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, 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": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations",
        "periodEndLabel": "Cash, cash equivalents and $1,512 in restricted cash at end of each period",
        "periodStartLabel": "Cash, cash equivalents and $1,512 in restricted cash at beginning of each period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r123",
      "r499"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
        "totalLabel": "Net increase (decrease) in cash, cash equivalents and restricted cash"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue": {
     "auth_ref": [
      "r452"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of all liability derivatives designated as cash flow hedging instruments.",
        "label": "us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue",
        "verboseLabel": "Interest rate swap"
       }
      }
     },
     "localname": "CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Non-cash investing and financing activities:"
       }
      }
     },
     "localname": "CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ChangeInAccountingEstimateByTypeAxis": {
     "auth_ref": [
      "r157",
      "r181"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of change in accounting estimate.",
        "label": "Change in Accounting Estimate by Type [Axis]"
       }
      }
     },
     "localname": "ChangeInAccountingEstimateByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ChangeInAccountingEstimateTypeDomain": {
     "auth_ref": [
      "r157",
      "r181"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identification of the accounting estimate that was changed that had the effect of adjusting the carrying amount of an existing asset or liability, or that will alter the subsequent accounting for existing or future assets or liabilities.",
        "label": "Change in Accounting Estimate, Type [Domain]"
       }
      }
     },
     "localname": "ChangeInAccountingEstimateTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ClassOfWarrantOrRightAxis": {
     "auth_ref": [
      "r343",
      "r383"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of warrant or right issued.",
        "label": "Class of Warrant or Right [Axis]"
       }
      }
     },
     "localname": "ClassOfWarrantOrRightAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ClassOfWarrantOrRightDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the class or type of warrant or right outstanding. Warrants and rights represent derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months.",
        "label": "Class of Warrant or Right [Domain]"
       }
      }
     },
     "localname": "ClassOfWarrantOrRightDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1": {
     "auth_ref": [
      "r338"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Exercise price per share or per unit of warrants or rights outstanding.",
        "label": "us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1",
        "terseLabel": "Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)"
       }
      }
     },
     "localname": "ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CoVenturerMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Other venturer from the perspective of the entity in the corporate joint venture.",
        "label": "Co-venturer [Member]"
       }
      }
     },
     "localname": "CoVenturerMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CollaborativeArrangementMember": {
     "auth_ref": [
      "r426"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual arrangement that involves two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity.",
        "label": "Collaborative Arrangement [Member]"
       }
      }
     },
     "localname": "CollaborativeArrangementMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r67",
      "r585",
      "r612"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "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 (see Note 18)"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommodityContractMember": {
     "auth_ref": [
      "r370",
      "r454"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is tied to commodity prices.",
        "label": "Commodity Contract [Member]"
       }
      }
     },
     "localname": "CommodityContractMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockDividendsPerShareDeclared": {
     "auth_ref": [
      "r342"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.",
        "label": "Dividends (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareDeclared",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited-parentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r143",
      "r144",
      "r465"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r45"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common stock, par value (in dollars per share)"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r45"
     ],
     "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 (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r45"
     ],
     "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 (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r45",
      "r337"
     ],
     "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 (in shares)",
        "periodEndLabel": "Balances (in shares)",
        "periodStartLabel": "Balances (in shares)"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r45",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common stock, $0.01 par value, authorized 150,000,000 shares; issued and outstanding: 45,364,137 shares as of March 31, 2022, 45,840,260 shares as of December 31, 2021 and 45,791,712 shares as of March 31, 2021"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r84",
      "r86",
      "r87",
      "r101",
      "r594",
      "r620"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "us-gaap_ComprehensiveIncomeNetOfTax",
        "totalLabel": "Comprehensive loss attributable to Granite Construction Incorporated"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r84",
      "r86",
      "r100",
      "r431",
      "r432",
      "r444",
      "r593",
      "r619"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest",
        "negatedLabel": "Non-controlling interests in comprehensive income"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r84",
      "r86",
      "r99",
      "r430",
      "r444",
      "r592",
      "r618"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
        "totalLabel": "Comprehensive loss"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskBenchmarkDomain": {
     "auth_ref": [
      "r184",
      "r185",
      "r220",
      "r485",
      "r486",
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.",
        "label": "Concentration Risk Benchmark [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskBenchmarkDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConcentrationRiskByBenchmarkAxis": {
     "auth_ref": [
      "r184",
      "r185",
      "r220",
      "r485",
      "r486",
      "r642",
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by benchmark of concentration risk.",
        "label": "Concentration Risk Benchmark [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByBenchmarkAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskByTypeAxis": {
     "auth_ref": [
      "r184",
      "r185",
      "r220",
      "r485",
      "r486",
      "r642",
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of concentration risk, for example, but not limited to, asset, liability, net assets, geographic, customer, employees, supplier, lender.",
        "label": "Concentration Risk Type [Axis]"
       }
      }
     },
     "localname": "ConcentrationRiskByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r184",
      "r185",
      "r220",
      "r485",
      "r486"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"benchmark\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.",
        "label": "us-gaap_ConcentrationRiskPercentage1",
        "terseLabel": "Concentration Risk, Percentage"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConcentrationRiskTypeDomain": {
     "auth_ref": [
      "r184",
      "r185",
      "r220",
      "r485",
      "r486",
      "r650"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration.",
        "label": "Concentration Risk Type [Domain]"
       }
      }
     },
     "localname": "ConcentrationRiskTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConstructionMember": {
     "auth_ref": [
      "r364"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Building or developing real estate. Includes, but is not limited to, improvement to land for drainage, utilities, grading and subdividing.",
        "label": "Construction [Member]"
       }
      }
     },
     "localname": "ConstructionMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock": {
     "auth_ref": [
      "r349"
     ],
     "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]"
       }
      }
     },
     "localname": "ContractWithCustomerAssetAndLiabilityTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ContractWithCustomerAssetNet": {
     "auth_ref": [
      "r345",
      "r347",
      "r361"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "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 assets"
       }
      }
     },
     "localname": "ContractWithCustomerAssetNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerAssetNetCurrent": {
     "auth_ref": [
      "r345",
      "r347",
      "r361"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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, classified as current.",
        "label": "us-gaap_ContractWithCustomerAssetNetCurrent",
        "totalLabel": "Total contract assets"
       }
      }
     },
     "localname": "ContractWithCustomerAssetNetCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiability": {
     "auth_ref": [
      "r345",
      "r346",
      "r361"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.",
        "label": "us-gaap_ContractWithCustomerLiability",
        "terseLabel": "Contract with Customer, Liability, Total",
        "totalLabel": "Total contract liabilities"
       }
      }
     },
     "localname": "ContractWithCustomerLiability",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice": {
     "auth_ref": [
      "r348"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained.",
        "label": "us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice",
        "terseLabel": "Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityCurrent": {
     "auth_ref": [
      "r345",
      "r346",
      "r361"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.",
        "label": "Contract liabilities"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ContractWithCustomerLiabilityRevenueRecognized": {
     "auth_ref": [
      "r362"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.",
        "label": "us-gaap_ContractWithCustomerLiabilityRevenueRecognized",
        "terseLabel": "Contract with Customer, Liability, Revenue Recognized"
       }
      }
     },
     "localname": "ContractWithCustomerLiabilityRevenueRecognized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConvertibleDebtFairValueDisclosures": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.",
        "label": "2.75% Convertible Notes"
       }
      }
     },
     "localname": "ConvertibleDebtFairValueDisclosures",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConvertibleDebtMember": {
     "auth_ref": [
      "r306",
      "r307",
      "r308",
      "r310",
      "r314",
      "r315",
      "r316",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r329",
      "r330",
      "r331",
      "r332"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.",
        "label": "Convertible Debt [Member]"
       }
      }
     },
     "localname": "ConvertibleDebtMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConvertibleDebtSecuritiesMember": {
     "auth_ref": [
      "r370"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Debt securities that can be exchanged for equity of the debt issuer at the option of the issuer or the holder.",
        "label": "Convertible Debt Securities [Member]"
       }
      }
     },
     "localname": "ConvertibleDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Corporation owned and operated by a small group of ventures to accomplish a mutually beneficial venture or project.",
        "label": "Corporate Joint Venture [Member]"
       }
      }
     },
     "localname": "CorporateJointVentureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CostOfGoodsAndServicesSold": {
     "auth_ref": [
      "r105",
      "r555"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_GrossProfit",
       "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": "Total cost of revenue",
        "verboseLabel": "Cost of revenue"
       }
      }
     },
     "localname": "CostOfGoodsAndServicesSold",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CostOfGoodsAndServicesSoldAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cost of revenue"
       }
      }
     },
     "localname": "CostOfGoodsAndServicesSoldAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "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]"
       }
      }
     },
     "localname": "CreditFacilityAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "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]"
       }
      }
     },
     "localname": "CreditFacilityDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CustomerConcentrationRiskMember": {
     "auth_ref": [
      "r183",
      "r220"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reflects the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.",
        "label": "Customer Concentration Risk [Member]"
       }
      }
     },
     "localname": "CustomerConcentrationRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtInstrumentAxis": {
     "auth_ref": [
      "r39",
      "r40",
      "r41",
      "r135",
      "r142",
      "r307",
      "r308",
      "r309",
      "r310",
      "r311",
      "r312",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r329",
      "r330",
      "r331",
      "r332",
      "r514",
      "r579",
      "r581",
      "r601"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.",
        "label": "Debt Instrument [Axis]"
       }
      }
     },
     "localname": "DebtInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "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": "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1",
        "terseLabel": "Debt Instrument, Basis Spread on Variable Rate"
       }
      }
     },
     "localname": "DebtInstrumentBasisSpreadOnVariableRate1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentCarryingAmount": {
     "auth_ref": [
      "r41",
      "r325",
      "r581",
      "r601"
     ],
     "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": "us-gaap_DebtInstrumentCarryingAmount",
        "terseLabel": "Long-Term Debt, Gross"
       }
      }
     },
     "localname": "DebtInstrumentCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent": {
     "auth_ref": [
      "r324"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.",
        "label": "us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent",
        "terseLabel": "Debt Instrument, Convertible, Carrying Amount of Equity Component"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentConvertibleConversionPrice1": {
     "auth_ref": [
      "r309",
      "r327"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The price per share of the conversion feature embedded in the debt instrument.",
        "label": "us-gaap_DebtInstrumentConvertibleConversionPrice1",
        "terseLabel": "Debt Instrument, Convertible, Conversion Price (in dollars per share)"
       }
      }
     },
     "localname": "DebtInstrumentConvertibleConversionPrice1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_DebtInstrumentInterestRateEffectivePercentage": {
     "auth_ref": [
      "r65",
      "r328",
      "r512",
      "r514"
     ],
     "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": "us-gaap_DebtInstrumentInterestRateEffectivePercentage",
        "terseLabel": "Debt Instrument, Interest Rate, Effective Percentage"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateEffectivePercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentInterestRateStatedPercentage": {
     "auth_ref": [
      "r65",
      "r308"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.",
        "label": "Interest rate",
        "terseLabel": "Debt Instrument, Interest Rate, Stated Percentage"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateStatedPercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentNameDomain": {
     "auth_ref": [
      "r66",
      "r135",
      "r142",
      "r307",
      "r308",
      "r309",
      "r310",
      "r311",
      "r312",
      "r313",
      "r314",
      "r315",
      "r316",
      "r317",
      "r318",
      "r319",
      "r320",
      "r321",
      "r322",
      "r323",
      "r329",
      "r330",
      "r331",
      "r332",
      "r514"
     ],
     "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]"
       }
      }
     },
     "localname": "DebtInstrumentNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredIncomeTaxAssetsNet": {
     "auth_ref": [
      "r392",
      "r393"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.",
        "label": "Deferred income taxes, net"
       }
      }
     },
     "localname": "DeferredIncomeTaxAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r127",
      "r137",
      "r400",
      "r411",
      "r412",
      "r413"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 19.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.",
        "label": "Deferred income taxes"
       }
      }
     },
     "localname": "DeferredIncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilitiesNet": {
     "auth_ref": [
      "r392",
      "r393"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.",
        "label": "us-gaap_DeferredIncomeTaxLiabilitiesNet",
        "terseLabel": "Other long-term liabilities"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilitiesNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredTaxAssetsNet": {
     "auth_ref": [
      "r398"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.",
        "label": "us-gaap_DeferredTaxAssetsNet",
        "terseLabel": "Deferred Tax Assets, Net of Valuation Allowance, Total"
       }
      }
     },
     "localname": "DeferredTaxAssetsNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationAndAmortization": {
     "auth_ref": [
      "r127",
      "r263"
     ],
     "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": "us-gaap_DepreciationAndAmortization",
        "terseLabel": "Depreciation, depletion and amortization"
       }
      }
     },
     "localname": "DepreciationAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationAndAmortizationDiscontinuedOperations": {
     "auth_ref": [
      "r16",
      "r127"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.",
        "label": "us-gaap_DepreciationAndAmortizationDiscontinuedOperations",
        "terseLabel": "Depreciation, depletion and amortization"
       }
      }
     },
     "localname": "DepreciationAndAmortizationDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepreciationDepletionAndAmortization": {
     "auth_ref": [
      "r127",
      "r193"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 3.0,
       "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"
       }
      }
     },
     "localname": "DepreciationDepletionAndAmortization",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetsCurrent": {
     "auth_ref": [
      "r71"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "label": "us-gaap_DerivativeAssetsCurrent",
        "verboseLabel": "Commodity swap"
       }
      }
     },
     "localname": "DerivativeAssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeContractTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Contract [Domain]"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeGainLossOnDerivativeNet": {
     "auth_ref": [
      "r451"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.",
        "label": "us-gaap_DerivativeGainLossOnDerivativeNet",
        "terseLabel": "Derivative, Gain (Loss) on Derivative, Net, Total"
       }
      }
     },
     "localname": "DerivativeGainLossOnDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r74",
      "r450",
      "r452",
      "r453",
      "r455"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeLiabilityNotionalAmount": {
     "auth_ref": [
      "r447",
      "r448",
      "r449"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payments on the derivative liability.",
        "label": "us-gaap_DerivativeLiabilityNotionalAmount",
        "terseLabel": "Derivative Liability, Notional Amount"
       }
      }
     },
     "localname": "DerivativeLiabilityNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r448",
      "r449"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "us-gaap_DerivativeNotionalAmount",
        "terseLabel": "Derivative, Notional Amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisaggregationOfRevenueTableTextBlock": {
     "auth_ref": [
      "r360"
     ],
     "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]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureTextBlockAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "us-gaap_DisclosureTextBlockAbstract",
        "terseLabel": "Notes to Financial Statements"
       }
      }
     },
     "localname": "DisclosureTextBlockAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax": {
     "auth_ref": [
      "r8",
      "r10",
      "r12"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 16.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.",
        "label": "us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax",
        "negatedLabel": "Gain on sale of discontinued operations (see Note 3)",
        "negatedTerseLabel": "Gain on sale of discontinued operations",
        "terseLabel": "Gain on sale of discontinued operations"
       }
      }
     },
     "localname": "DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax": {
     "auth_ref": [
      "r8",
      "r9",
      "r10",
      "r11",
      "r12",
      "r14",
      "r96",
      "r615"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.",
        "label": "us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax",
        "totalLabel": "Income (loss) from discontinued operations before provision for (benefit from) income taxes"
       }
      }
     },
     "localname": "DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation": {
     "auth_ref": [
      "r9",
      "r10",
      "r11",
      "r12",
      "r14",
      "r19",
      "r394",
      "r410",
      "r416"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.",
        "label": "us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation",
        "terseLabel": "Provision for (benefit from) income taxes"
       }
      }
     },
     "localname": "DiscontinuedOperationTaxEffectOfDiscontinuedOperation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 1.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet",
        "verboseLabel": "Receivables, net"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 4.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as accounts payable attributable to disposal group held for sale or disposed of.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable",
        "verboseLabel": "Accounts payable"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationAccountsPayable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 9.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents",
        "verboseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration",
        "terseLabel": "Disposal Group, Including Discontinued Operation, Consideration"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationConsideration",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwill1": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 2.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as goodwill attributable to disposal group held for sale or disposed of.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwill1",
        "verboseLabel": "Goodwill"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationGoodwill1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss": {
     "auth_ref": [
      "r15",
      "r20"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 2.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss",
        "totalLabel": "Gross profit"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r262",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 5.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as inventory attributable to disposal group, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent",
        "verboseLabel": "Inventories"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationInventoryCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss": {
     "auth_ref": [
      "r15"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
        "totalLabel": "Operating income (loss)"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r262",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 7.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets",
        "verboseLabel": "Other current assets"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r262",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 1.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as other liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities",
        "verboseLabel": "Other current liabilities"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r261",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 6.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets",
        "verboseLabel": "Other noncurrent assets"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r261",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 3.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsLiabilitiesHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as other liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities",
        "verboseLabel": "Other long-term liabilities"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details": {
       "order": 8.0,
       "parentTag": "gva_DisposalGroupIncludingDiscontinuedOperationsAssetsHeldforsale",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment",
        "verboseLabel": "Property and equipment, net"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue": {
     "auth_ref": [
      "r15",
      "r20"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": 0.0,
       "parentTag": "us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.",
        "label": "us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue",
        "terseLabel": "Revenue"
       }
      }
     },
     "localname": "DisposalGroupIncludingDiscontinuedOperationRevenue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock": {
     "auth_ref": [
      "r21",
      "r270"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.",
        "label": "Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]"
       }
      }
     },
     "localname": "DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain": {
     "auth_ref": [
      "r379",
      "r381"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of disposal group.",
        "label": "Disposal Group Name [Domain]"
       }
      }
     },
     "localname": "DisposalGroupsIncludingDiscontinuedOperationsNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DividendsCommonStock": {
     "auth_ref": [
      "r342",
      "r599"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).",
        "label": "us-gaap_DividendsCommonStock",
        "negatedLabel": "Dividends on common stock ($0.13 per share)"
       }
      }
     },
     "localname": "DividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DividendsPayableCurrentAndNoncurrent": {
     "auth_ref": [
      "r40",
      "r43",
      "r580",
      "r603"
     ],
     "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 declared but not paid"
       }
      }
     },
     "localname": "DividendsPayableCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r102",
      "r154",
      "r155",
      "r156",
      "r157",
      "r158",
      "r165",
      "r168",
      "r172",
      "r173",
      "r174",
      "r178",
      "r179",
      "r466",
      "r467",
      "r595",
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Basic loss per share (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r102",
      "r154",
      "r155",
      "r156",
      "r157",
      "r158",
      "r168",
      "r172",
      "r173",
      "r174",
      "r178",
      "r179",
      "r466",
      "r467",
      "r595",
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Diluted loss per share (in dollars per share)",
        "terseLabel": "Earnings Per Share, Diluted, Total (in dollars per share)"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r175",
      "r176",
      "r177",
      "r180"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateContinuingOperations": {
     "auth_ref": [
      "r395"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "us-gaap_EffectiveIncomeTaxRateContinuingOperations",
        "terseLabel": "Effective tax rate"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EmployeeRelatedLiabilitiesCurrent": {
     "auth_ref": [
      "r62"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 2.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Payroll and related employee benefits"
       }
      }
     },
     "localname": "EmployeeRelatedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r2",
      "r88",
      "r89",
      "r90",
      "r143",
      "r144",
      "r145",
      "r150",
      "r159",
      "r161",
      "r182",
      "r244",
      "r337",
      "r342",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r465",
      "r500",
      "r501",
      "r502",
      "r503",
      "r504",
      "r506",
      "r534",
      "r632",
      "r633",
      "r634"
     ],
     "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]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentDividendsOrDistributions": {
     "auth_ref": [
      "r95",
      "r122",
      "r127",
      "r613"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 2.0,
       "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": "Distributions from unconsolidated construction joint ventures and affiliates"
       }
      }
     },
     "localname": "EquityMethodInvestmentDividendsOrDistributions",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis": {
     "auth_ref": [
      "r20",
      "r136",
      "r239",
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by nonconsolidated equity method investee. Excludes information consolidated by reporting entity.",
        "label": "Equity Method Investment, Nonconsolidated Investee [Axis]"
       }
      }
     },
     "localname": "EquityMethodInvestmentNonconsolidatedInvesteeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain": {
     "auth_ref": [
      "r20",
      "r136",
      "r239",
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Nonconsolidated equity method investee. Excludes information consolidated by reporting entity.",
        "label": "Equity Method Investment, Nonconsolidated Investee [Domain]"
       }
      }
     },
     "localname": "EquityMethodInvestmentNonconsolidatedInvesteeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember": {
     "auth_ref": [
      "r20",
      "r136",
      "r239",
      "r487"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Nonconsolidated equity method investee or group of nonconsolidated investees. Excludes information consolidated by reporting entity.",
        "label": "Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]"
       }
      }
     },
     "localname": "EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityMethodInvestmentOwnershipPercentage": {
     "auth_ref": [
      "r238"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.",
        "label": "us-gaap_EquityMethodInvestmentOwnershipPercentage",
        "terseLabel": "Equity Method Investment, Ownership Percentage"
       }
      }
     },
     "localname": "EquityMethodInvestmentOwnershipPercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EquityMethodInvestments": {
     "auth_ref": [
      "r33",
      "r199",
      "r237"
     ],
     "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": "Total investments in affiliates",
        "verboseLabel": "Granite\u2019s share of net assets"
       }
      }
     },
     "localname": "EquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityMethodInvestmentsTextBlock": {
     "auth_ref": [
      "r240"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information.",
        "label": "Equity Method Investments [Table Text Block]"
       }
      }
     },
     "localname": "EquityMethodInvestmentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EstimateOfFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r482"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured as an estimate of fair value.",
        "label": "Estimate of Fair Value Measurement [Member]"
       }
      }
     },
     "localname": "EstimateOfFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain": {
     "auth_ref": [
      "r476"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Class of asset.",
        "label": "Asset Class [Domain]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueByAssetClassAxis": {
     "auth_ref": [
      "r472",
      "r478"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by class of asset.",
        "label": "Asset Class [Axis]"
       }
      }
     },
     "localname": "FairValueByAssetClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTextBlock": {
     "auth_ref": [
      "r472",
      "r483"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374",
      "r375",
      "r376",
      "r378",
      "r473",
      "r544",
      "r545",
      "r546"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementBasisAxis": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r472",
      "r479"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by measurement basis.",
        "label": "Measurement Basis [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementBasisAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r472",
      "r473",
      "r474",
      "r475",
      "r480"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Measurement Frequency [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r477"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r316",
      "r370",
      "r371",
      "r376",
      "r378",
      "r473",
      "r544"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r370",
      "r371",
      "r376",
      "r378",
      "r473",
      "r545"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374",
      "r375",
      "r376",
      "r378",
      "r473",
      "r546"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measurement frequency.",
        "label": "Measurement Frequency [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r316",
      "r329",
      "r330",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374",
      "r375",
      "r376",
      "r378",
      "r544",
      "r545",
      "r546"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r477",
      "r480"
     ],
     "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]"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivablesTextBlock": {
     "auth_ref": [
      "r226",
      "r231"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for financing receivable.",
        "label": "Financing Receivables [Text Block]"
       }
      }
     },
     "localname": "FinancingReceivablesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net"
     ],
     "xbrltype": "textBlockItemType"
    },
    "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]"
       }
      }
     },
     "localname": "FurnitureAndFixturesMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GainLossOnDispositionOfAssets1": {
     "auth_ref": [
      "r127"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.",
        "label": "us-gaap_GainLossOnDispositionOfAssets1",
        "negatedLabel": "Gain on sales of property and equipment, net",
        "negatedTerseLabel": "Gain on sales of property and equipment"
       }
      }
     },
     "localname": "GainLossOnDispositionOfAssets1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfCommodityContracts": {
     "auth_ref": [
      "r127"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.",
        "label": "us-gaap_GainLossOnSaleOfCommodityContracts",
        "terseLabel": "Gain (Loss) on Sale of Commodity Contracts"
       }
      }
     },
     "localname": "GainLossOnSaleOfCommodityContracts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfPropertyPlantEquipment": {
     "auth_ref": [
      "r127"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 18.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.",
        "label": "us-gaap_GainLossOnSaleOfPropertyPlantEquipment",
        "negatedLabel": "Gain on sales of property and equipment, net"
       }
      }
     },
     "localname": "GainLossOnSaleOfPropertyPlantEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossRelatedToLitigationSettlement": {
     "auth_ref": [
      "r275"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.",
        "label": "us-gaap_GainLossRelatedToLitigationSettlement",
        "terseLabel": "Gain (Loss) Related to Litigation Settlement"
       }
      }
     },
     "localname": "GainLossRelatedToLitigationSettlement",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Goodwill": {
     "auth_ref": [
      "r36",
      "r250",
      "r251",
      "r258",
      "r260",
      "r542",
      "r577"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill"
       }
      }
     },
     "localname": "Goodwill",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GrossProfit": {
     "auth_ref": [
      "r103",
      "r136",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r487"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.",
        "label": "Total gross profit from continuing operations",
        "terseLabel": "Gross Profit, Total",
        "totalLabel": "Gross profit"
       }
      }
     },
     "localname": "GrossProfit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsByNatureAxis": {
     "auth_ref": [
      "r289"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by nature of guarantee.",
        "label": "Guarantor Obligations, Nature [Axis]"
       }
      }
     },
     "localname": "GuaranteeObligationsByNatureAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GuaranteeObligationsCurrentCarryingValue": {
     "auth_ref": [
      "r288"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.",
        "label": "us-gaap_GuaranteeObligationsCurrentCarryingValue",
        "terseLabel": "Guarantor Obligations, Current Carrying Value"
       }
      }
     },
     "localname": "GuaranteeObligationsCurrentCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsMaximumExposure": {
     "auth_ref": [
      "r287"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.",
        "label": "us-gaap_GuaranteeObligationsMaximumExposure",
        "terseLabel": "Guarantor Obligations, Maximum Exposure, Undiscounted"
       }
      }
     },
     "localname": "GuaranteeObligationsMaximumExposure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsNatureDomain": {
     "auth_ref": [
      "r286"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Represents a description of the nature of the guarantee or each group of similar guarantees.",
        "label": "Guarantor Obligations, Nature [Domain]"
       }
      }
     },
     "localname": "GuaranteeObligationsNatureDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesFairValue": {
     "auth_ref": [
      "r235",
      "r236",
      "r584"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity).",
        "label": "Held-to-maturity marketable securities (1)"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesFairValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesNoncurrent": {
     "auth_ref": [
      "r233",
      "r234",
      "r249"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity), classified as noncurrent.",
        "label": "Long-term marketable securities"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperations": {
     "auth_ref": [
      "r104",
      "r128",
      "r154",
      "r155",
      "r156",
      "r157",
      "r170",
      "r174",
      "r429"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of income (loss) from continuing operations attributable to the parent.",
        "label": "Net loss from continuing operations allocated to common shareholders",
        "terseLabel": "Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent, Total",
        "totalLabel": "Net loss attributable to Granite Construction Incorporated from continuing operations"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity": {
     "auth_ref": [
      "r427",
      "r430"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperations",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of income (loss) from continuing operations attributable to the noncontrolling interest.",
        "label": "us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity",
        "negatedLabel": "Amount attributable to non-controlling interests from continuing operations"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r94",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214",
      "r575",
      "r588",
      "r597",
      "r622"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest",
       "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": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
        "terseLabel": "Loss from continuing operations before benefit from income taxes",
        "totalLabel": "Loss from continuing operations before benefit from income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r136",
      "r149",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r430",
      "r467",
      "r487"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.",
        "label": "us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest",
        "totalLabel": "Net loss from continuing operations"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsPerBasicShare": {
     "auth_ref": [
      "r92",
      "r102",
      "r149",
      "r154",
      "r155",
      "r156",
      "r157",
      "r168",
      "r172",
      "r173",
      "r467",
      "r586",
      "r589",
      "r595",
      "r614"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.",
        "label": "Basic continuing operations per share (in dollars per share)"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsPerBasicShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare": {
     "auth_ref": [
      "r92",
      "r102",
      "r149",
      "r154",
      "r155",
      "r156",
      "r157",
      "r168",
      "r172",
      "r173",
      "r174",
      "r467",
      "r595",
      "r614",
      "r617",
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of net income (loss) derived from continuing operations during 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": "Diluted continuing operations per share (in dollars per share)"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsPerDilutedShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax": {
     "auth_ref": [
      "r8",
      "r9",
      "r10",
      "r11",
      "r12",
      "r19",
      "r20",
      "r417",
      "r615"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.",
        "label": "Net income (loss) from discontinued operations",
        "totalLabel": "Net income (loss) from discontinued operations"
       }
      }
     },
     "localname": "IncomeLossFromDiscontinuedOperationsNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity": {
     "auth_ref": [
      "r8",
      "r9",
      "r10",
      "r11",
      "r12",
      "r14",
      "r19",
      "r430"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.",
        "label": "Net income (loss) attributable to Granite Construction Incorporated from discontinued operations"
       }
      }
     },
     "localname": "IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare": {
     "auth_ref": [
      "r96",
      "r102",
      "r169",
      "r172",
      "r173",
      "r595",
      "r615",
      "r617",
      "r621"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.",
        "label": "Basic discontinued operations per share (in dollars per share)"
       }
      }
     },
     "localname": "IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare": {
     "auth_ref": [
      "r169",
      "r172",
      "r173",
      "r445"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.",
        "label": "Diluted discontinued operations per share (in dollars per share)"
       }
      }
     },
     "localname": "IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_IncomeLossFromEquityMethodInvestments": {
     "auth_ref": [
      "r95",
      "r127",
      "r195",
      "r237",
      "r587",
      "r613"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "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": "us-gaap_IncomeLossFromEquityMethodInvestments",
        "negatedLabel": "Equity in (income) loss of affiliates, net"
       }
      }
     },
     "localname": "IncomeLossFromEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis": {
     "auth_ref": [
      "r379",
      "r381"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by name of disposal group.",
        "label": "Disposal Group Name [Axis]"
       }
      }
     },
     "localname": "IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r267",
      "r272"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [
      "r272"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r138",
      "r396",
      "r397",
      "r399",
      "r409",
      "r414",
      "r418",
      "r419",
      "r420"
     ],
     "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]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r139",
      "r160",
      "r161",
      "r196",
      "r394",
      "r410",
      "r415",
      "r623"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest",
       "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": "Benefit from income taxes on continuing operations",
        "terseLabel": "Benefit from income taxes on continuing operations"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaidNet": {
     "auth_ref": [
      "r130"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.",
        "label": "Income taxes"
       }
      }
     },
     "localname": "IncomeTaxesPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInAccountsPayable": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.",
        "label": "us-gaap_IncreaseDecreaseInAccountsPayable",
        "terseLabel": "Accounts payable"
       }
      }
     },
     "localname": "IncreaseDecreaseInAccountsPayable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInContractWithCustomerAsset": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.",
        "label": "us-gaap_IncreaseDecreaseInContractWithCustomerAsset",
        "negatedLabel": "Contract assets, net"
       }
      }
     },
     "localname": "IncreaseDecreaseInContractWithCustomerAsset",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInInventories": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.",
        "label": "us-gaap_IncreaseDecreaseInInventories",
        "negatedLabel": "Inventories"
       }
      }
     },
     "localname": "IncreaseDecreaseInInventories",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Changes in assets and liabilities:"
       }
      }
     },
     "localname": "IncreaseDecreaseInOperatingCapitalAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 17.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in other obligations or expenses incurred but not yet paid.",
        "label": "Accrued expenses and other liabilities, net"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInOtherOperatingAssets": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of increase (decrease) in operating assets classified as other.",
        "label": "us-gaap_IncreaseDecreaseInOtherOperatingAssets",
        "negatedLabel": "Other assets, net"
       }
      }
     },
     "localname": "IncreaseDecreaseInOtherOperatingAssets",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInReceivables": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) during the reporting period in the total amount due within one year (or one operating cycle) from all parties, associated with underlying transactions that are classified as operating activities.",
        "label": "us-gaap_IncreaseDecreaseInReceivables",
        "negatedLabel": "Receivables"
       }
      }
     },
     "localname": "IncreaseDecreaseInReceivables",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InsuranceSettlementsReceivable": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.",
        "label": "us-gaap_InsuranceSettlementsReceivable",
        "terseLabel": "Insurance Settlements Receivable"
       }
      }
     },
     "localname": "InsuranceSettlementsReceivable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpense": {
     "auth_ref": [
      "r93",
      "r192",
      "r510",
      "r513",
      "r596"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.",
        "label": "Interest expense",
        "terseLabel": "Interest Expense, Total"
       }
      }
     },
     "localname": "InterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r120",
      "r124",
      "r130"
     ],
     "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"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InventoryNet": {
     "auth_ref": [
      "r25",
      "r54",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.",
        "label": "Inventories"
       }
      }
     },
     "localname": "InventoryNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeInterest": {
     "auth_ref": [
      "r107",
      "r191"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.",
        "label": "us-gaap_InvestmentIncomeInterest",
        "negatedLabel": "Interest income"
       }
      }
     },
     "localname": "InvestmentIncomeInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures": {
     "auth_ref": [
      "r38"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in equity method investee and investment in and advance to affiliate.",
        "label": "Investments in affiliates"
       }
      }
     },
     "localname": "InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock": {
     "auth_ref": [
      "r648"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for the information summarizing investments in and advances to majority-owned subsidiaries, other controlled companies, and other affiliates. It reflects specified information about ownership, financial results from, and financial position in such entities.",
        "label": "Investments in and Advances to Affiliates, Schedule of Investments [Text Block]"
       }
      }
     },
     "localname": "InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LandAndLandImprovementsMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Real estate held and assets that are an addition or improvement to real estate held.",
        "label": "Land and Land Improvements [Member]"
       }
      }
     },
     "localname": "LandAndLandImprovementsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LegalMattersAndContingenciesTextBlock": {
     "auth_ref": [
      "r283"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for legal proceedings, legal contingencies, litigation, regulatory and environmental matters and other contingencies.",
        "label": "Legal Matters and Contingencies [Text Block]"
       }
      }
     },
     "localname": "LegalMattersAndContingenciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings"
     ],
     "xbrltype": "textBlockItemType"
    },
    "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": "us-gaap_LettersOfCreditOutstandingAmount",
        "terseLabel": "Letters of Credit Outstanding, Amount"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r61",
      "r136",
      "r206",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r434",
      "r438",
      "r439",
      "r487",
      "r540",
      "r541"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 0.0,
       "parentTag": "us-gaap_AssetsNet",
       "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": "us-gaap_Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r52",
      "r136",
      "r239",
      "r487",
      "r542",
      "r583",
      "r609"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "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": "us-gaap_LiabilitiesAndStockholdersEquity",
        "totalLabel": "Total liabilities and equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesCurrent": {
     "auth_ref": [
      "r28",
      "r64",
      "r136",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r434",
      "r438",
      "r439",
      "r487",
      "r540",
      "r541",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.",
        "label": "us-gaap_LiabilitiesCurrent",
        "terseLabel": "Current liabilities",
        "totalLabel": "Total current liabilities"
       }
      }
     },
     "localname": "LiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesCurrentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Current liabilities"
       }
      }
     },
     "localname": "LiabilitiesCurrentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosure": {
     "auth_ref": [
      "r472"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value of financial and nonfinancial obligations.",
        "label": "us-gaap_LiabilitiesFairValueDisclosure",
        "verboseLabel": "Total liabilities"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesNoncurrent": {
     "auth_ref": [
      "r29",
      "r30",
      "r31",
      "r41",
      "r42",
      "r136",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r434",
      "r438",
      "r439",
      "r487",
      "r540",
      "r541"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details": {
       "order": 0.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of obligation due after one year or beyond the normal operating cycle, if longer.",
        "label": "us-gaap_LiabilitiesNoncurrent",
        "terseLabel": "Long-term liabilities"
       }
      }
     },
     "localname": "LiabilitiesNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r18",
      "r20",
      "r262",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.",
        "label": "us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent",
        "terseLabel": "Current liabilities held-for-sale"
       }
      }
     },
     "localname": "LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent": {
     "auth_ref": [
      "r6",
      "r7",
      "r17",
      "r18",
      "r20",
      "r261",
      "r268"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.",
        "label": "us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent",
        "terseLabel": "Long-term liabilities held-for-sale"
       }
      }
     },
     "localname": "LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity": {
     "auth_ref": [
      "r58"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).",
        "label": "us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity",
        "terseLabel": "Line of Credit Facility, Remaining Borrowing Capacity"
       }
      }
     },
     "localname": "LineOfCreditFacilityRemainingBorrowingCapacity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LitigationSettlementAmountAwardedToOtherParty": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount awarded to other party in judgment or settlement of litigation.",
        "label": "us-gaap_LitigationSettlementAmountAwardedToOtherParty",
        "terseLabel": "Litigation Settlement, Amount Awarded to Other Party"
       }
      }
     },
     "localname": "LitigationSettlementAmountAwardedToOtherParty",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LitigationSettlementExpense": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.",
        "label": "us-gaap_LitigationSettlementExpense",
        "terseLabel": "Litigation Settlement, Expense"
       }
      }
     },
     "localname": "LitigationSettlementExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LitigationStatusAxis": {
     "auth_ref": [
      "r275"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by status of pending, threatened, or settled litigation.",
        "label": "Litigation Status [Axis]"
       }
      }
     },
     "localname": "LitigationStatusAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LitigationStatusDomain": {
     "auth_ref": [
      "r275"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Status of pending, threatened, or settled litigation.",
        "label": "Litigation Status [Domain]"
       }
      }
     },
     "localname": "LitigationStatusDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LondonInterbankOfferedRateLIBORMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.",
        "label": "London Interbank Offered Rate (LIBOR) [Member]"
       }
      }
     },
     "localname": "LondonInterbankOfferedRateLIBORMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LongTermDebt": {
     "auth_ref": [
      "r41",
      "r315",
      "r326",
      "r329",
      "r330",
      "r581",
      "r604"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.",
        "label": "us-gaap_LongTermDebt",
        "verboseLabel": "Total debt"
       }
      }
     },
     "localname": "LongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtCurrent": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Current maturities of long-term debt",
        "terseLabel": "Long-Term Debt, Current Maturities, Total"
       }
      }
     },
     "localname": "LongTermDebtCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtNoncurrent": {
     "auth_ref": [
      "r41"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.",
        "label": "Long-term debt",
        "terseLabel": "Long-Term Debt, Excluding Current Maturities, Total"
       }
      }
     },
     "localname": "LongTermDebtNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtTextBlock": {
     "auth_ref": [
      "r333"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for long-term debt.",
        "label": "Long-Term Debt [Text Block]"
       }
      }
     },
     "localname": "LongTermDebtTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LongtermDebtTypeAxis": {
     "auth_ref": [
      "r66"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of long-term debt.",
        "label": "Long-Term Debt, Type [Axis]"
       }
      }
     },
     "localname": "LongtermDebtTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LongtermDebtTypeDomain": {
     "auth_ref": [
      "r66",
      "r290"
     ],
     "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]"
       }
      }
     },
     "localname": "LongtermDebtTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LossContingencyAccrualAtCarryingValue": {
     "auth_ref": [
      "r275",
      "r276"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of loss contingency liability.",
        "label": "us-gaap_LossContingencyAccrualAtCarryingValue",
        "terseLabel": "Loss Contingency Accrual, Ending Balance"
       }
      }
     },
     "localname": "LossContingencyAccrualAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LossContingencyAccrualPayments": {
     "auth_ref": [
      "r275"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow reducing loss contingency liability.",
        "label": "us-gaap_LossContingencyAccrualPayments",
        "terseLabel": "Loss Contingency Accrual, Payments"
       }
      }
     },
     "localname": "LossContingencyAccrualPayments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LossContingencyDamagesSoughtValue": {
     "auth_ref": [
      "r275",
      "r277",
      "r279"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The value (monetary amount) of the award the plaintiff seeks in the legal matter.",
        "label": "us-gaap_LossContingencyDamagesSoughtValue",
        "terseLabel": "Loss Contingency, Damages Sought, Value"
       }
      }
     },
     "localname": "LossContingencyDamagesSoughtValue",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LossContingencyEstimateOfPossibleLoss": {
     "auth_ref": [
      "r278",
      "r280",
      "r285"
     ],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.",
        "label": "us-gaap_LossContingencyEstimateOfPossibleLoss",
        "terseLabel": "Loss Contingency, Estimate of Possible Loss"
       }
      }
     },
     "localname": "LossContingencyEstimateOfPossibleLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MarketableSecuritiesCurrent": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of investment in marketable security, classified as current.",
        "label": "Short-term marketable securities"
       }
      }
     },
     "localname": "MarketableSecuritiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MiningPropertiesAndMineralRightsMember": {
     "auth_ref": [
      "r574"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Legal right to explore, extract, and retain some or all portions of the benefits from mining or mineral deposits and properties used for mining.",
        "label": "Mining Properties and Mineral Rights [Member]"
       }
      }
     },
     "localname": "MiningPropertiesAndMineralRightsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r70",
      "r136",
      "r239",
      "r291",
      "r296",
      "r297",
      "r298",
      "r304",
      "r305",
      "r487",
      "r582",
      "r608"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).",
        "label": "Non-controlling interests"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterestPeriodIncreaseDecrease": {
     "auth_ref": [
      "r428"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.",
        "label": "Transactions with non-controlling interests"
       }
      }
     },
     "localname": "MinorityInterestPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MoneyMarketFundsMember": {
     "auth_ref": [
      "r370"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fund that invests in short-term money-market instruments, for example, but not limited to, commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and other highly liquid securities.",
        "label": "Money Market Funds [Member]"
       }
      }
     },
     "localname": "MoneyMarketFundsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NetCashProvidedByUsedInContinuingOperations": {
     "auth_ref": [
      "r123"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The increase (decrease) in cash associated with the entity's continuing operating, investing, and financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.",
        "label": "us-gaap_NetCashProvidedByUsedInContinuingOperations",
        "terseLabel": "Net Cash Provided by (Used in) Continuing Operations, Total"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r123"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
        "totalLabel": "Net cash used in financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r123"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.",
        "label": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
        "totalLabel": "Net cash provided by (used in) investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r123",
      "r125",
      "r128"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
        "totalLabel": "Net cash provided by (used in) operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r20",
      "r82",
      "r85",
      "r90",
      "r97",
      "r128",
      "r136",
      "r149",
      "r154",
      "r155",
      "r156",
      "r157",
      "r160",
      "r161",
      "r170",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r467",
      "r487",
      "r590",
      "r616"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "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": "us-gaap_NetIncomeLoss",
        "totalLabel": "Net loss attributable to Granite Construction Incorporated"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": {
     "auth_ref": [
      "r154",
      "r155",
      "r156",
      "r157",
      "r165",
      "r166",
      "r171",
      "r174",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.",
        "label": "Net loss allocated to common shareholders"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock": {
     "auth_ref": [
      "r5",
      "r147",
      "r148",
      "r151",
      "r152",
      "r162",
      "r163",
      "r164",
      "r229",
      "r230",
      "r245",
      "r246",
      "r406",
      "r407",
      "r408",
      "r463",
      "r469",
      "r470",
      "r471",
      "r494",
      "r495",
      "r496",
      "r520",
      "r521",
      "r529",
      "r535",
      "r559",
      "r560",
      "r561",
      "r636",
      "r637",
      "r638",
      "r639",
      "r641"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.",
        "label": "Accounting Standards Update and Change in Accounting Principle [Text Block]"
       }
      }
     },
     "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r143",
      "r144",
      "r145",
      "r342",
      "r427"
     ],
     "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]"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NonoperatingIncomeExpense": {
     "auth_ref": [
      "r108"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).",
        "label": "us-gaap_NonoperatingIncomeExpense",
        "negatedTerseLabel": "Total other expense, net",
        "negatedTotalLabel": "Total other expense, net"
       }
      }
     },
     "localname": "NonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NonoperatingIncomeExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other (income) expense"
       }
      }
     },
     "localname": "NonoperatingIncomeExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NotesPayableFairValueDisclosure": {
     "auth_ref": [
      "r60"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Fair value portion of notes payable.",
        "label": "Notes"
       }
      }
     },
     "localname": "NotesPayableFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [
      "r198",
      "r204",
      "r208",
      "r211",
      "r214"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net result for the period of deducting operating expenses from operating revenues.",
        "label": "us-gaap_OperatingIncomeLoss",
        "totalLabel": "Operating loss"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiabilityNoncurrent": {
     "auth_ref": [
      "r523"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.",
        "label": "Long-term lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiabilityNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeasePayments": {
     "auth_ref": [
      "r524",
      "r525"
     ],
     "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": "Cash paid for operating lease liabilities"
       }
      }
     },
     "localname": "OperatingLeasePayments",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r522"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 3.0,
       "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": "Right of use assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingSegmentsMember": {
     "auth_ref": [
      "r203",
      "r204",
      "r205",
      "r206",
      "r208",
      "r214"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Operating Segments [Member]"
       }
      }
     },
     "localname": "OperatingSegmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock": {
     "auth_ref": [
      "r23",
      "r446"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.",
        "label": "Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherAccruedLiabilitiesCurrent": {
     "auth_ref": [
      "r62"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details": {
       "order": 5.0,
       "parentTag": "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.",
        "label": "Other"
       }
      }
     },
     "localname": "OtherAccruedLiabilitiesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherAssetsCurrent": {
     "auth_ref": [
      "r55",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of current assets classified as other.",
        "label": "Other current assets"
       }
      }
     },
     "localname": "OtherAssetsCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherAssetsNoncurrent": {
     "auth_ref": [
      "r37"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncurrent assets classified as other.",
        "label": "Other noncurrent assets"
       }
      }
     },
     "localname": "OtherAssetsNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax": {
     "auth_ref": [
      "r76",
      "r78"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.",
        "label": "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax",
        "totalLabel": "Net change"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax": {
     "auth_ref": [
      "r76",
      "r78"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.",
        "label": "Net unrealized gain on cash flow hedges"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax": {
     "auth_ref": [
      "r78",
      "r81"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.",
        "label": "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax",
        "negatedLabel": "Less: reclassification for net gains included in interest expense"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax": {
     "auth_ref": [
      "r75"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.",
        "label": "Foreign currency translation adjustments, net"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r83",
      "r86",
      "r88",
      "r89",
      "r91",
      "r98",
      "r337",
      "r500",
      "r505",
      "r506",
      "r591",
      "r617"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).",
        "label": "Other comprehensive income",
        "totalLabel": "Other comprehensive income"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other comprehensive income, net of tax:"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock": {
     "auth_ref": [
      "r368",
      "r391"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.",
        "label": "Other Income and Other Expense Disclosure [Text Block]"
       }
      }
     },
     "localname": "OtherIncomeAndOtherExpenseDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherLiabilitiesDisclosureTextBlock": {
     "auth_ref": [
      "r63"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for other liabilities.",
        "label": "Other Liabilities Disclosure [Text Block]"
       }
      }
     },
     "localname": "OtherLiabilitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherNoncashIncomeExpense": {
     "auth_ref": [
      "r128"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other.",
        "label": "us-gaap_OtherNoncashIncomeExpense",
        "negatedLabel": "Other non-cash adjustments"
       }
      }
     },
     "localname": "OtherNoncashIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNonoperatingIncomeExpense": {
     "auth_ref": [
      "r110"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_NonoperatingIncomeExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.",
        "label": "us-gaap_OtherNonoperatingIncomeExpense",
        "negatedLabel": "Other (income) expense, net"
       }
      }
     },
     "localname": "OtherNonoperatingIncomeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherOperatingIncomeExpenseNet": {
     "auth_ref": [],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.",
        "label": "us-gaap_OtherOperatingIncomeExpenseNet",
        "negatedLabel": "Other costs (see Note 7)"
       }
      }
     },
     "localname": "OtherOperatingIncomeExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ParentMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Portion of equity, or net assets, in the consolidated entity attributable, directly or indirectly, to the parent. Excludes noncontrolling interests.",
        "label": "Parent [Member]"
       }
      }
     },
     "localname": "ParentMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": {
     "auth_ref": [
      "r112",
      "r114"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.",
        "label": "us-gaap_PaymentsForProceedsFromOtherInvestingActivities",
        "negatedLabel": "Collection of notes receivable"
       }
      }
     },
     "localname": "PaymentsForProceedsFromOtherInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForRepurchaseOfCommonStock": {
     "auth_ref": [
      "r117"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 2.0,
       "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": "us-gaap_PaymentsForRepurchaseOfCommonStock",
        "negatedLabel": "Repurchases of common stock"
       }
      }
     },
     "localname": "PaymentsForRepurchaseOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDividendsCommonStock": {
     "auth_ref": [
      "r117"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.",
        "label": "us-gaap_PaymentsOfDividendsCommonStock",
        "negatedLabel": "Cash dividends paid"
       }
      }
     },
     "localname": "PaymentsOfDividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireMarketableSecurities": {
     "auth_ref": [
      "r232"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash outflow for purchase of marketable security.",
        "label": "us-gaap_PaymentsToAcquireMarketableSecurities",
        "negatedLabel": "Purchases of marketable securities"
       }
      }
     },
     "localname": "PaymentsToAcquireMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r113"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.",
        "label": "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment",
        "negatedLabel": "Purchases of property and equipment"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PerformanceGuaranteeMember": {
     "auth_ref": [
      "r284"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An agreement (contract) that requires the guarantor to make payments to a guaranteed party based on another entity's failure to perform under an obligating agreement. This may include the issuance of a performance standby letter of credit which requires the guarantor to make payments if a specified party fails to perform under a nonfinancial contractual obligation.",
        "label": "Performance Guarantee [Member]"
       }
      }
     },
     "localname": "PerformanceGuaranteeMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PortionAtFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r481"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Measured at fair value for financial reporting purposes.",
        "label": "Portion at Fair Value Measurement [Member] [Default]"
       }
      }
     },
     "localname": "PortionAtFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r44",
      "r334"
     ],
     "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 value (in dollars per share)"
       }
      }
     },
     "localname": "PreferredStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r44"
     ],
     "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 (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesOutstanding": {
     "auth_ref": [
      "r44"
     ],
     "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 (in shares)"
       }
      }
     },
     "localname": "PreferredStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockValueOutstanding": {
     "auth_ref": [
      "r44"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders.",
        "label": "Preferred stock, $0.01 par value, authorized 3,000,000 shares, none outstanding"
       }
      }
     },
     "localname": "PreferredStockValueOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PrimeRateMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Interest rate charged by financial institutions to their most creditworthy borrowers.",
        "label": "Prime Rate [Member]"
       }
      }
     },
     "localname": "PrimeRateMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ProceedsFromLinesOfCredit": {
     "auth_ref": [
      "r115",
      "r135"
     ],
     "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": "us-gaap_ProceedsFromLinesOfCredit",
        "terseLabel": "Proceeds from Lines of Credit, Total"
       }
      }
     },
     "localname": "ProceedsFromLinesOfCredit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromMinorityShareholders": {
     "auth_ref": [
      "r116"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 3.0,
       "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": "Contributions from non-controlling partners"
       }
      }
     },
     "localname": "ProceedsFromMinorityShareholders",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromPaymentsForOtherFinancingActivities": {
     "auth_ref": [
      "r116",
      "r119"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities classified as other.",
        "label": "Other financing activities, net"
       }
      }
     },
     "localname": "ProceedsFromPaymentsForOtherFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment": {
     "auth_ref": [
      "r111"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.",
        "label": "Proceeds from sales of property and equipment"
       }
      }
     },
     "localname": "ProceedsFromSaleOfPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r20",
      "r82",
      "r85",
      "r90",
      "r121",
      "r136",
      "r149",
      "r160",
      "r161",
      "r198",
      "r204",
      "r208",
      "r211",
      "r214",
      "r239",
      "r291",
      "r292",
      "r293",
      "r296",
      "r297",
      "r298",
      "r300",
      "r302",
      "r304",
      "r305",
      "r430",
      "r435",
      "r436",
      "r443",
      "r444",
      "r467",
      "r487",
      "r597"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss": {
       "order": 0.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "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 loss",
        "totalLabel": "Net loss",
        "verboseLabel": "Net loss"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentByTypeAxis": {
     "auth_ref": [
      "r266"
     ],
     "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]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentByTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": {
     "auth_ref": [
      "r270",
      "r651",
      "r652",
      "r653"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.",
        "label": "Property, Plant and Equipment Disclosure [Text Block]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentGross": {
     "auth_ref": [
      "r34",
      "r264"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details": {
       "order": 0.0,
       "parentTag": "us-gaap_PropertyPlantAndEquipmentNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property and equipment, gross"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentGross",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r266",
      "r542",
      "r598",
      "r611"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property and equipment, net",
        "totalLabel": "Property and equipment, net"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTextBlock": {
     "auth_ref": [
      "r266"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.",
        "label": "Property, Plant and Equipment [Table Text Block]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentTypeDomain": {
     "auth_ref": [
      "r264"
     ],
     "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]"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ProvisionForLossOnContracts": {
     "auth_ref": [
      "r344"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details": {
       "order": 1.0,
       "parentTag": "us-gaap_ContractWithCustomerLiability",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.",
        "label": "Provisions for losses"
       }
      }
     },
     "localname": "ProvisionForLossOnContracts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReceivablesNetCurrent": {
     "auth_ref": [
      "r542",
      "r610",
      "r645"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_AssetsCurrent",
       "weight": 1.0
      },
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.",
        "label": "Receivables, net",
        "totalLabel": "Total net receivables"
       }
      }
     },
     "localname": "ReceivablesNetCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock": {
     "auth_ref": [
      "r204",
      "r208"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment.",
        "label": "Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]"
       }
      }
     },
     "localname": "ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RelatedPartyDomain": {
     "auth_ref": [
      "r377",
      "r536",
      "r537"
     ],
     "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]"
       }
      }
     },
     "localname": "RelatedPartyDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": {
     "auth_ref": [
      "r377",
      "r536",
      "r538",
      "r562",
      "r563",
      "r564",
      "r565",
      "r566",
      "r567",
      "r568",
      "r569",
      "r570",
      "r571",
      "r572",
      "r573"
     ],
     "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]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsByRelatedPartyAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RepaymentsOfDebt": {
     "auth_ref": [
      "r118"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.",
        "label": "us-gaap_RepaymentsOfDebt",
        "terseLabel": "Repayments of Debt"
       }
      }
     },
     "localname": "RepaymentsOfDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfLongTermDebt": {
     "auth_ref": [
      "r118"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.",
        "label": "us-gaap_RepaymentsOfLongTermDebt",
        "negatedLabel": "Debt principal repayments"
       }
      }
     },
     "localname": "RepaymentsOfLongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedCash": {
     "auth_ref": [
      "r32",
      "r134",
      "r576",
      "r605"
     ],
     "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",
        "periodStartLabel": "Restricted cash"
       }
      }
     },
     "localname": "RestrictedCash",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RestrictedStockUnitsRSUMember": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.",
        "label": "Restricted Stock Units (RSUs) [Member]"
       }
      }
     },
     "localname": "RestrictedStockUnitsRSUMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r48",
      "r342",
      "r542",
      "r607",
      "r636",
      "r641"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 4.0,
       "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",
        "terseLabel": "Retained Earnings (Accumulated Deficit), Total"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r2",
      "r143",
      "r144",
      "r145",
      "r150",
      "r159",
      "r161",
      "r244",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r465",
      "r632",
      "r634"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromCollaborativeArrangementExcludingRevenueFromContractWithCustomer": {
     "auth_ref": [
      "r424",
      "r425"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of revenue from collaborative arrangement. Excludes revenue from contract with customer under Topic 606.",
        "label": "us-gaap_RevenueFromCollaborativeArrangementExcludingRevenueFromContractWithCustomer",
        "verboseLabel": "Revenue"
       }
      }
     },
     "localname": "RevenueFromCollaborativeArrangementExcludingRevenueFromContractWithCustomer",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r189",
      "r190",
      "r203",
      "r209",
      "r210",
      "r216",
      "r217",
      "r220",
      "r359",
      "r360",
      "r555"
     ],
     "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": "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax",
        "terseLabel": "Revenue"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax": {
     "auth_ref": [
      "r189",
      "r190",
      "r203",
      "r209",
      "r210",
      "r216",
      "r217",
      "r220",
      "r359",
      "r360",
      "r555"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_GrossProfit",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount, including 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": "Total revenue",
        "terseLabel": "Revenue from Contract with Customer, Including Assessed Tax"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerIncludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerTextBlock": {
     "auth_ref": [
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r357",
      "r358",
      "r363",
      "r367"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.",
        "label": "Revenue from Contract with Customer [Text Block]"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RevenueRemainingPerformanceObligation": {
     "auth_ref": [
      "r355"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of transaction price allocated to performance obligation that has not been recognized as revenue.",
        "label": "Unearned Revenue",
        "terseLabel": "Revenue, Remaining Performance Obligation, Amount"
       }
      }
     },
     "localname": "RevenueRemainingPerformanceObligation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1": {
     "auth_ref": [
      "r356"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1",
        "terseLabel": "Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)"
       }
      }
     },
     "localname": "RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis": {
     "auth_ref": [
      "r356"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Start date of time band for expected timing of satisfaction of remaining performance obligation, in YYYY-MM-DD format.",
        "label": "Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]"
       }
      }
     },
     "localname": "RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Revenue"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited"
     ],
     "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]"
       }
      }
     },
     "localname": "RevolvingCreditFacilityMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r526",
      "r527"
     ],
     "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 assets obtained in exchange for lease obligations"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock": {
     "auth_ref": [
      "r69"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.",
        "label": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of the components of accrued liabilities.",
        "label": "Schedule of Accrued Liabilities [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfAccruedLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": {
     "auth_ref": [
      "r401"
     ],
     "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]"
       }
      }
     },
     "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDebtInstrumentsTextBlock": {
     "auth_ref": [
      "r66",
      "r142",
      "r329",
      "r331",
      "r338",
      "r339",
      "r340",
      "r341",
      "r511",
      "r512",
      "r515",
      "r600"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.",
        "label": "Schedule of Long-Term Debt Instruments [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfDebtInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": {
     "auth_ref": [
      "r174"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.",
        "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": {
     "auth_ref": [
      "r472",
      "r473"
     ],
     "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]"
       }
      }
     },
     "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": {
     "auth_ref": [
      "r198",
      "r201",
      "r207",
      "r259"
     ],
     "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]"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [
      "r186",
      "r189",
      "r190",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r196",
      "r197",
      "r198",
      "r199",
      "r200",
      "r203",
      "r204",
      "r205",
      "r206",
      "r208",
      "r209",
      "r210",
      "r211",
      "r212",
      "r214",
      "r220",
      "r251",
      "r252",
      "r253",
      "r254",
      "r255",
      "r256",
      "r257",
      "r258",
      "r259",
      "r260",
      "r273",
      "r274",
      "r624"
     ],
     "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]"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r186",
      "r187",
      "r188",
      "r198",
      "r202",
      "r208",
      "r212",
      "r213",
      "r214",
      "r215",
      "r216",
      "r219",
      "r220",
      "r221"
     ],
     "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]"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SellingGeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r106"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.",
        "label": "Selling, general and administrative expenses",
        "terseLabel": "Selling, general and administrative expenses"
       }
      }
     },
     "localname": "SellingGeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShareBasedCompensation": {
     "auth_ref": [
      "r126"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount of noncash expense for share-based payment arrangement.",
        "label": "Stock-based compensation"
       }
      }
     },
     "localname": "ShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.",
        "label": "us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation",
        "negatedLabel": "Purchases of common stock (1) (in shares)"
       }
      }
     },
     "localname": "SharesPaidForTaxWithholdingForShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r13",
      "r186",
      "r189",
      "r190",
      "r191",
      "r192",
      "r193",
      "r194",
      "r195",
      "r196",
      "r197",
      "r198",
      "r199",
      "r200",
      "r203",
      "r204",
      "r205",
      "r206",
      "r208",
      "r209",
      "r210",
      "r211",
      "r212",
      "r214",
      "r220",
      "r251",
      "r252",
      "r253",
      "r254",
      "r255",
      "r256",
      "r257",
      "r258",
      "r259",
      "r260",
      "r269",
      "r273",
      "r274",
      "r624"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Segments [Axis]"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r2",
      "r68",
      "r88",
      "r89",
      "r90",
      "r143",
      "r144",
      "r145",
      "r150",
      "r159",
      "r161",
      "r182",
      "r244",
      "r337",
      "r342",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r465",
      "r500",
      "r501",
      "r502",
      "r503",
      "r504",
      "r506",
      "r534",
      "r632",
      "r633",
      "r634"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Comprehensive Income [Abstract]"
       }
      }
     },
     "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r143",
      "r144",
      "r145",
      "r182",
      "r555"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-comprehensive-income-loss",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-1-basis-of-presentation",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-cash-and-cash-equivalents-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-schedule-of-carrying-and-fair-value-amounts-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-unconsolidated-construction-joint-ventures-financial-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-summarized-balance-sheet-information-for-equity-method-investments-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-property-plant-and-equipment-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-accrued-expenses-and-other-current-liabilities-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-schedule-of-longterm-debt-details-parentheticals",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-schedule-of-benefit-from-provision-for-income-taxes-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-reconciliation-of-segment-gross-loss-profit-to-consolidated-loss-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-segment-reporting-information-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-assets-and-liabilities-heldforsale-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-cash-flows-for-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-discontinued-operations-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates",
      "http://www.graniteconstruction.com/20220331/role/statement-note-4-revisions-in-estimates-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-schedule-of-disaggregation-of-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-schedule-of-unearned-revenue-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs",
      "http://www.graniteconstruction.com/20220331/role/statement-note-7-other-costs-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-component-of-contract-asset-and-liability-balances-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation": {
     "auth_ref": [
      "r44",
      "r45",
      "r337",
      "r342"
     ],
     "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": "RSUs vested (in shares)"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation": {
     "auth_ref": [
      "r44",
      "r45",
      "r342",
      "r384"
     ],
     "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": "RSUs vested"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r45",
      "r50",
      "r51",
      "r136",
      "r225",
      "r239",
      "r487",
      "r542"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 0.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "us-gaap_StockholdersEquity",
        "totalLabel": "Total Granite Construction Incorporated shareholders\u2019 equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Equity"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r2",
      "r3",
      "r89",
      "r136",
      "r143",
      "r144",
      "r145",
      "r150",
      "r159",
      "r239",
      "r244",
      "r342",
      "r388",
      "r389",
      "r390",
      "r404",
      "r405",
      "r427",
      "r428",
      "r442",
      "r465",
      "r487",
      "r500",
      "r501",
      "r506",
      "r534",
      "r633",
      "r634"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited": {
       "order": 1.0,
       "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": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
        "periodEndLabel": "Balances",
        "periodStartLabel": "Balances",
        "totalLabel": "Total equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SubsequentEventMember": {
     "auth_ref": [
      "r507",
      "r543"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SubsequentEventTypeAxis": {
     "auth_ref": [
      "r507",
      "r543"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.",
        "label": "Subsequent Event Type [Axis]"
       }
      }
     },
     "localname": "SubsequentEventTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubsequentEventTypeDomain": {
     "auth_ref": [
      "r507",
      "r543"
     ],
     "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]"
       }
      }
     },
     "localname": "SubsequentEventTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings",
      "http://www.graniteconstruction.com/20220331/role/statement-note-18-contingencies-legal-proceedings-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "Supplementary Information"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "label": "us-gaap_TableTextBlock",
        "terseLabel": "Notes Tables"
       }
      }
     },
     "localname": "TableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-12-investments-in-affiliates-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-13-property-and-equipment-net-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-14-accrued-expenses-and-other-current-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-17-income-taxes-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-19-reportable-segment-information-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-3-discontinued-operations-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-5-disaggregation-of-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-6-unearned-revenue-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-8-contract-assets-and-liabilities-tables",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-tables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TypeOfAdoptionMember": {
     "auth_ref": [
      "r0",
      "r1",
      "r2",
      "r3",
      "r4",
      "r149",
      "r150",
      "r151",
      "r153",
      "r162",
      "r227",
      "r228",
      "r241",
      "r242",
      "r243",
      "r244",
      "r247",
      "r248",
      "r388",
      "r389",
      "r390",
      "r402",
      "r403",
      "r404",
      "r405",
      "r421",
      "r422",
      "r423",
      "r456",
      "r457",
      "r458",
      "r459",
      "r460",
      "r461",
      "r462",
      "r464",
      "r465",
      "r466",
      "r467",
      "r468",
      "r488",
      "r489",
      "r490",
      "r491",
      "r492",
      "r493",
      "r497",
      "r498",
      "r508",
      "r509",
      "r516",
      "r517",
      "r518",
      "r519",
      "r528",
      "r530",
      "r531",
      "r532",
      "r533",
      "r534",
      "r556",
      "r557",
      "r558",
      "r630",
      "r631",
      "r632",
      "r633",
      "r634",
      "r635",
      "r636",
      "r637",
      "r638",
      "r639",
      "r640",
      "r641"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amendment to accounting standards.",
        "label": "Accounting Standards Update [Domain]"
       }
      }
     },
     "localname": "TypeOfAdoptionMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-2-recently-issued-and-adopted-accounting-pronouncements-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TypeOfArrangementAxis": {
     "auth_ref": [
      "r426"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.",
        "label": "Collaborative Arrangement and Arrangement Other than Collaborative [Axis]"
       }
      }
     },
     "localname": "TypeOfArrangementAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-schedule-of-unconsolidated-construction-joint-ventures-revenue-and-costs-details"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_UnbilledReceivablesCurrent": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.",
        "label": "Unbilled"
       }
      }
     },
     "localname": "UnbilledReceivablesCurrent",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-schedule-of-receivables-details"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts": {
     "auth_ref": [
      "r127"
     ],
     "crdr": "credit",
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.",
        "label": "us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts",
        "terseLabel": "Unrealized Gain (Loss) on Derivatives and Commodity Contracts, Total"
       }
      }
     },
     "localname": "UnrealizedGainLossOnDerivativesAndCommodityContracts",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-10-fair-value-measurement-details-textual"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableInterestEntityOwnershipPercentage": {
     "auth_ref": [
      "r441"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).",
        "label": "us-gaap_VariableInterestEntityOwnershipPercentage",
        "terseLabel": "Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage"
       }
      }
     },
     "localname": "VariableInterestEntityOwnershipPercentage",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_VariableInterestEntityPrimaryBeneficiaryMember": {
     "auth_ref": [
      "r433",
      "r434",
      "r438",
      "r439",
      "r440"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Variable Interest Entities (VIE) in which the entity has a controlling financial interest (as defined) and of which it is therefore the primary beneficiary. A controlling financial interest is determined based on both: (a) the entity's power to direct activities of the VIE that most significantly impact the VIE's economic performance and (b) the entity's obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. VIEs of which the entity is the primary beneficiary are included in the consolidated financial statements of the entity.",
        "label": "Variable Interest Entity, Primary Beneficiary [Member]"
       }
      }
     },
     "localname": "VariableInterestEntityPrimaryBeneficiaryMember",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures",
      "http://www.graniteconstruction.com/20220331/role/statement-note-11-construction-joint-ventures-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableRateAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Information by type of variable rate.",
        "label": "Variable Rate [Axis]"
       }
      }
     },
     "localname": "VariableRateAxis",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "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]"
       }
      }
     },
     "localname": "VariableRateDomain",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements",
      "http://www.graniteconstruction.com/20220331/role/statement-note-15-longterm-debt-and-credit-arrangements-details-textual",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net",
      "http://www.graniteconstruction.com/20220331/role/statement-note-9-receivables-net-details-textual"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r167",
      "r174"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Diluted (in shares)",
        "totalLabel": "Weighted average common shares outstanding, diluted (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r165",
      "r174"
     ],
     "calculation": {
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details": {
       "order": 0.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Basic (in shares)",
        "verboseLabel": "Weighted average common shares outstanding, basic (in shares)"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2022",
     "presentation": [
      "http://www.graniteconstruction.com/20220331/role/statement-condensed-consolidated-statements-of-operations-unaudited",
      "http://www.graniteconstruction.com/20220331/role/statement-note-16-weighted-average-shares-outstanding-and-net-income-loss-per-share-reconciliation-of-the-weighted-average-shares-outstanding-in-basic-and-diluted-net-loss-per-share-details"
     ],
     "xbrltype": "sharesItemType"
    }
   },
   "unitCount": 5
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(23))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(24))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(25))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.1,2)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.13)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.2(a),(d))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(b))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3367-108585"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3000-108585"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21D",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=SL94080555-108585"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(f))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(1)(Note 1))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h)(2))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(1)(iii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(m)(2)(ii))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "https://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124436220&loc=d3e21728-107793"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.M.Q2)",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=122038215&loc=d3e31137-122693"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "https://asc.fasb.org/extlink&oid=122038215&loc=SL108384541-122693"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "250",
   "URI": "https://asc.fasb.org/topic&trid=2122394"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1377-109256"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1505-109256"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1252-109256"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1278-109256"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=126958026&loc=d3e1337-109256"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e3842-109258"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "https://asc.fasb.org/extlink&oid=128363288&loc=d3e4984-109258"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "https://asc.fasb.org/topic&trid=2144383"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "270",
   "URI": "https://asc.fasb.org/extlink&oid=126900757&loc=d3e777-108305"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "https://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8657-108599"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8813-108599"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8813-108599"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8813-108599"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "26",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8844-108599"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/subtopic&trid=2122178"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e8981-108599"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=77885760&loc=SL35686385-199418"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "https://asc.fasb.org/topic&trid=2134510"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=124259787&loc=d3e4531-111522"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "https://asc.fasb.org/subtopic&trid=2196772"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(1)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "205",
   "URI": "https://asc.fasb.org/topic&trid=2122149"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)(2)",
   "Topic": "310",
   "URI": "https://asc.fasb.org/extlink&oid=126986314&loc=SL124402458-218513"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "20",
   "Topic": "310",
   "URI": "https://asc.fasb.org/subtopic&trid=2196816"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(4)",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=126905981&loc=d3e2510-110228"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=126905981&loc=d3e2473-110228"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "360",
   "URI": "https://asc.fasb.org/topic&trid=2155823"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "410",
   "URI": "https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "420",
   "URI": "https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=124098289&loc=d3e6904-107765"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q2)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y.Q4)",
   "Topic": "450",
   "URI": "https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "https://asc.fasb.org/topic&trid=2127136"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=126907419&loc=d3e10037-110241"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(24))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123465755&loc=SL6230698-112601"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(ii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iii))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-01(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(i))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(25))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iii)(C))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(4)(iv))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.13-02(a)(5))",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466302&loc=d3e4852-112606"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 201.5-02(26))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69B",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(10))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69C",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69E",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495743-112612"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "69F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "470",
   "URI": "https://asc.fasb.org/extlink&oid=123466577&loc=SL123495745-112612"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "470",
   "URI": "https://asc.fasb.org/topic&trid=2208564"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21506-112644"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21521-112644"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=126973232&loc=d3e21538-112644"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "50",
   "Topic": "505",
   "URI": "https://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "35",
   "Topic": "605",
   "URI": "https://asc.fasb.org/extlink&oid=126916656&loc=d3e57777-111642"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126919976&loc=SL49130533-203044"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(14))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130558-203045"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(15))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920106&loc=SL49130550-203045"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920602&loc=SL49130690-203046-203046"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920602&loc=SL49130690-203046-203046"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "https://asc.fasb.org/extlink&oid=126920602&loc=SL49130690-203046-203046"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "606",
   "URI": "https://asc.fasb.org/topic&trid=49130388"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "610",
   "URI": "https://asc.fasb.org/topic&trid=49130413"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(18))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "https://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5047-113901"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(ii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iii)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)(iv)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "https://asc.fasb.org/extlink&oid=128097895&loc=SL121327923-165333"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "720",
   "URI": "https://asc.fasb.org/topic&trid=2122503"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e31917-109318"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123427490&loc=d3e31931-109318"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(20))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=126983759&loc=SL121830611-158277"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.7)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.1)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.I.Fact.2)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=109227538&loc=d3e44648-109337"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(23))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "https://asc.fasb.org/topic&trid=2144680"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "805",
   "URI": "https://asc.fasb.org/extlink&oid=128092918&loc=SL128093175-196984"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "https://asc.fasb.org/extlink&oid=128092918&loc=SL128093175-196984"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "805",
   "URI": "https://asc.fasb.org/extlink&oid=128092918&loc=SL128093175-196984"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "808",
   "URI": "https://asc.fasb.org/extlink&oid=126928961&loc=SL5834089-161433"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "808",
   "URI": "https://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "808",
   "URI": "https://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4568447-111683"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4568740-111683"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4613673-111683"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(24))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4569616-111683"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4569643-111683"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=126929396&loc=SL4613674-111683"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4590271-111686"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.E)",
   "Topic": "810",
   "URI": "https://asc.fasb.org/extlink&oid=120398118&loc=d3e355146-122828"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "810",
   "URI": "https://asc.fasb.org/topic&trid=2197479"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)(2)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3)(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)(2)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(2)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)(4)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(2)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(c)(3)",
   "Topic": "815",
   "URI": "https://asc.fasb.org/extlink&oid=126732423&loc=SL126732908-238011"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(1)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(2)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594809&loc=d3e13220-108610"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13476-108611"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL120254526-165497"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL120254526-165497"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(4))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL121967933-165497"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL122642865-165497"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "825",
   "URI": "https://asc.fasb.org/extlink&oid=126983955&loc=SL122642865-165497"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "105",
   "URI": "https://asc.fasb.org/extlink&oid=126987489&loc=SL124442142-165695"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r502": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r503": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "https://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "832",
   "URI": "https://asc.fasb.org/extlink&oid=128342835&loc=SL128342857-244232"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "832",
   "URI": "https://asc.fasb.org/extlink&oid=128342835&loc=SL128342857-244232"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(3)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128293352&loc=SL126838806-209984"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(1)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL122150809-237846"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL122150809-237846"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(4))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)(iii)(01)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)(iii)(03)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r535": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "848",
   "URI": "https://asc.fasb.org/extlink&oid=125980421&loc=SL125981372-237846"
  },
  "r536": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r537": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r538": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864"
  },
  "r539": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124437977&loc=d3e55792-112764"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(6))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r540": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r541": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765"
  },
  "r542": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "852",
   "URI": "https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766"
  },
  "r543": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "855",
   "URI": "https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662"
  },
  "r544": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r545": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r546": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r547": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r548": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r549": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(8))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r550": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r551": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r552": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r553": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "https://asc.fasb.org/extlink&oid=126937589&loc=SL119991595-234733"
  },
  "r554": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "912",
   "URI": "https://asc.fasb.org/extlink&oid=126938201&loc=d3e55302-109406"
  },
  "r555": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r556": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r557": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r558": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r559": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(1)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(9))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r560": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(2)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r561": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(f)(3)",
   "Topic": "926",
   "URI": "https://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r562": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61929-109447"
  },
  "r563": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61929-109447"
  },
  "r564": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62059-109447"
  },
  "r565": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62059-109447"
  },
  "r566": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62395-109447"
  },
  "r567": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62395-109447"
  },
  "r568": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62479-109447"
  },
  "r569": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e62479-109447"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r570": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=SL6807758-109447"
  },
  "r571": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=SL6807758-109447"
  },
  "r572": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(1)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61872-109447"
  },
  "r573": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(2)",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=126939881&loc=d3e61872-109447"
  },
  "r574": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "360",
   "Topic": "932",
   "URI": "https://asc.fasb.org/extlink&oid=96866604&loc=d3e64895-109465"
  },
  "r575": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "https://asc.fasb.org/extlink&oid=126941158&loc=d3e41242-110953"
  },
  "r576": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(1)(a))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r577": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10)(1))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r578": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r579": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(b),22(b))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r580": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(15)(5))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r581": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r582": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(22))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r583": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r584": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r585": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878"
  },
  "r586": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r587": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(f))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r588": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r589": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(20))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19,20)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r590": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r591": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r592": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(24))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r593": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(25))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r594": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(26))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r595": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(27))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r596": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.9)",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r597": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r598": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=124429447&loc=SL124453093-239630"
  },
  "r599": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "405",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=d3e1107-107759"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19,20,22)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r600": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823"
  },
  "r601": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r602": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r603": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(15)(5))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r604": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r605": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(2))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r606": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(3))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r607": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r608": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(24))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r609": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r610": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(5))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r611": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(8))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r612": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910"
  },
  "r613": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(10))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r614": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(11))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r615": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(12))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r616": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r617": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r618": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(20))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r619": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(21))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.20)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r620": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(22))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r621": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(23))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r622": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r623": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r624": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438"
  },
  "r625": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439"
  },
  "r626": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117783719-158441"
  },
  "r627": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117783719-158441"
  },
  "r628": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117783719-158441"
  },
  "r629": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.20,24)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r630": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r631": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r632": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r633": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r634": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r635": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(1)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r636": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r637": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r638": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r639": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.21)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r640": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(1)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r641": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641"
  },
  "r642": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "825",
   "Topic": "944",
   "URI": "https://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195"
  },
  "r643": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "205",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=118262037&loc=d3e9915-115836"
  },
  "r644": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.6-05(4))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401414&loc=d3e604008-122996"
  },
  "r645": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.6-06(3))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401414&loc=d3e604059-122996"
  },
  "r646": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.6-09(6))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272"
  },
  "r647": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.6-09(7))",
   "Topic": "946",
   "URI": "https://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272"
  },
  "r648": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "https://asc.fasb.org/subtopic&trid=2324412"
  },
  "r649": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "310",
   "Subparagraph": "(SX 210.12-29(Footnote 4))",
   "Topic": "948",
   "URI": "https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r650": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Topic": "954",
   "URI": "https://asc.fasb.org/extlink&oid=126942805&loc=d3e3115-115594"
  },
  "r651": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Subparagraph": "(d)",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916"
  },
  "r652": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916"
  },
  "r653": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "958",
   "URI": "https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916"
  },
  "r654": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column B))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r655": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column C))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r656": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column D))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r657": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column E))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r658": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column F))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r659": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column G))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r660": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column H))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r661": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Column I))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r662": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 2))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r663": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 4))",
   "Topic": "970",
   "URI": "https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r664": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(c)",
   "Topic": "976",
   "URI": "https://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663"
  },
  "r665": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "310",
   "Subparagraph": "(b)",
   "Topic": "978",
   "URI": "https://asc.fasb.org/extlink&oid=126945304&loc=d3e27327-108691"
  },
  "r666": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r667": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r668": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r669": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "308",
   "Subsection": "a"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r670": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r671": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.3,4)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.31)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226024-175313"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226049-175313"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e681-108580"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e689-108580"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126968391&loc=d3e557-108580"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "https://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=124507222&loc=d3e1436-108581"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(13))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868656-224227"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(210.5-03(11))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(12))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(14))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(22))",
   "Topic": "220",
   "URI": "https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227"
  }
 },
 "version": "2.1"
}
