$GVA
GRANITE CONSTRUCTION INC Stock $gva

$gva Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000143774921003662 Filed on February 22, 2021

Income Statement

Concept	2019 Q4	2019 Q1	2018 Q4
Revenue	$885.6M	$581.8M	$836.1M
YoY Change	5.92%	3.27%	4.35%
Cost Of Revenue	$834.4M	$580.7M	$807.2M
YoY Change	3.37%	14.43%	14.43%
Gross Profit	$51.22M	$1.138M	$30.49M
YoY Change	68.0%	-97.43%	-69.72%
Gross Profit Margin	5.78%	0.2%	3.65%
Selling, General & Admin	$82.80M	$80.16M	$78.30M
YoY Change	5.75%	29.59%	35.7%
% of Gross Profit	161.64%	7043.5%	256.8%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$30.70M	$29.06M	$33.70M
YoY Change	-8.9%	87.32%	89.33%
% of Gross Profit	59.93%	2553.16%	110.52%
Operating Expenses	$83.30M	$80.16M	$79.50M
YoY Change	4.78%	29.59%	37.78%
Operating Profit	-$32.08M	-$78.97M	-$49.01M
YoY Change	-34.55%	210.24%	-213.96%
Interest Expense	-$2.900M	$4.014M	-$1.200M
YoY Change	141.67%	64.85%	-233.33%
% of Operating Profit
Other Income/Expense, Net	$2.900M	$1.854M	-$500.0K
YoY Change	-680.0%	-293.53%	-126.32%
Pretax Income	-$28.90M	-$77.11M	-$42.40M
YoY Change	-31.84%	191.97%	-485.45%
Income Tax	-$8.900M	-$17.35M	-$10.20M
% Of Pretax Income
Net Earnings	-$19.38M	-$62.47M	-$52.68M
YoY Change	-63.21%	205.57%	-260.73%
Net Earnings / Revenue	-2.19%	-10.74%	-6.3%
Basic Earnings Per Share	-$0.42	-$1.34	-$1.12
Diluted Earnings Per Share	-$0.42	-$1.34	-$1.12
COMMON SHARES
Basic Shares Outstanding	46.74M	46.70K	46.90M
Diluted Shares Outstanding		46.70K

Balance Sheet

Concept	2019 Q4	2019 Q1	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$483.2M	$536.8M	$534.2M
YoY Change	-9.55%	9.91%	-2.75%
Cash & Equivalents	$252.3M	$200.3M	$272.8M
Short-Term Investments	$220.9M	$336.5M	$261.4M
Other Short-Term Assets	$46.02M	$62.76M	$48.71M
YoY Change	-5.53%	36.06%	33.4%
Inventory	$88.89M	$96.86M	$88.62M
Prepaid Expenses
Receivables	$758.9M	$628.5M	$669.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.377B	$1.210B	$1.341B
YoY Change	2.72%	14.97%	8.8%
LONG-TERM ASSETS
Property, Plant & Equipment	$542.3M	$552.5M	$549.7M
YoY Change	-1.34%	34.85%	34.92%
Goodwill	$264.3M	$259.7M	$259.5M
YoY Change	1.85%	382.71%	382.3%
Intangibles
YoY Change
Long-Term Investments	$84.18M	$81.03M	$84.35M
YoY Change	-0.21%	-23.55%	-18.5%
Other Assets	$106.7M	$123.6M	$126.9M
YoY Change	-15.91%	66.11%	68.74%
Total Long-Term Assets	$1.125B	$1.149B	$1.087B
YoY Change	3.54%	72.21%	69.81%
TOTAL ASSETS
Total Short-Term Assets	$1.377B	$1.210B	$1.341B
Total Long-Term Assets	$1.125B	$1.149B	$1.087B
Total Assets	$2.502B	$2.359B	$2.427B
YoY Change	3.09%	37.17%	29.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$400.8M	$216.2M	$256.8M
YoY Change	56.09%	-4.82%	8.03%
Accrued Expenses	$337.3M	$265.1M	$324.4M
YoY Change	3.98%	13.48%	37.23%
Deferred Revenue	$95.74M	$104.3M	$109.0M
YoY Change	-12.18%	46.92%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$8.244M	$47.28M	$47.29M
YoY Change	-82.57%	-0.04%	2.69%
Total Short-Term Liabilities	$842.1M	$675.8M	$737.4M
YoY Change	14.19%	10.04%	12.54%
LONG-TERM LIABILITIES
Long-Term Debt	$356.1M	$333.3M	$335.1M
YoY Change	6.26%	89.36%	87.79%
Other Long-Term Liabilities	$63.14M	$59.87M	$61.08M
YoY Change	3.37%	49.28%	38.55%
Total Long-Term Liabilities	$419.2M	$393.2M	$396.2M
YoY Change	5.82%	81.92%	78.04%
TOTAL LIABILITIES
Total Short-Term Liabilities	$842.1M	$675.8M	$737.4M
Total Long-Term Liabilities	$419.2M	$393.2M	$396.2M
Total Liabilities	$1.261B	$1.069B	$1.134B
YoY Change	11.26%	28.75%	29.14%
SHAREHOLDERS EQUITY
Retained Earnings	$594.4M	$610.3M	$679.5M
YoY Change	-12.52%	-9.81%	-13.3%
Common Stock	$549.8M	$567.0M	$565.0M
YoY Change	-2.7%	249.03%	251.44%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.141B	$1.176B	$1.244B
YoY Change
Total Liabilities & Shareholders Equity	$2.502B	$2.359B	$2.427B
YoY Change	3.09%	37.17%	29.66%

Cashflow Statement

Concept	2019 Q4	2019 Q1	2018 Q4
OPERATING ACTIVITIES
Net Income	-$19.38M	-$62.47M	-$52.68M
YoY Change	-63.21%	205.57%	-260.73%
Depreciation, Depletion And Amortization	$30.70M	$29.06M	$33.70M
YoY Change	-8.9%	87.32%	89.33%
Cash From Operating Activities	$137.9M	-$36.36M	$71.70M
YoY Change	92.33%	-3.34%	-12.13%
INVESTING ACTIVITIES
Capital Expenditures	-$23.50M	$28.74M	-$25.00M
YoY Change	-6.0%	80.02%	129.36%
Acquisitions
YoY Change
Other Investing Activities	$28.40M	$286.0K	$66.70M
YoY Change	-57.42%	-182.9%	-825.0%
Cash From Investing Activities	$4.900M	-$24.34M	$41.70M
YoY Change	-88.25%	-341.0%	-307.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$3.867M
YoY Change		-36.8%
Debt Paid & Issued, Net		$21.90M
YoY Change		1652.16%
Cash From Financing Activities	-65.00M	-$11.83M	-70.60M
YoY Change	-7.93%	-6.16%	430.83%
NET CHANGE
Cash From Operating Activities	137.9M	-$36.36M	71.70M
Cash From Investing Activities	4.900M	-$24.34M	41.70M
Cash From Financing Activities	-65.00M	-$11.83M	-70.60M
Net Change In Cash	77.80M	-$72.54M	42.80M
YoY Change	81.78%	80.77%	-11.2%
FREE CASH FLOW
Cash From Operating Activities	$137.9M	-$36.36M	$71.70M
Capital Expenditures	-$23.50M	$28.74M	-$25.00M
Free Cash Flow	$161.4M	-$65.11M	$96.70M
YoY Change	66.91%	21.5%	4.54%

Facts In Submission

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CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	220400000	USD
CY2019	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	15299000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	61520000	USD
CY2017	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	18703000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7672000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4182000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-82899000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	8216000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	62523000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7433000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	6082000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	4742000	USD
CY2019	us-gaap	Interest Expense InterestExpense	18374000	USD
CY2018	us-gaap	Interest Expense InterestExpense	14571000	USD
CY2017	us-gaap	Interest Expense InterestExpense	10800000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11454000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6935000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7107000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5308000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1666000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4699000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5821000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	112000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5748000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-77078000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8328000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68271000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20376000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3208000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25814000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-56702000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	11536000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	42457000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3489000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10954000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8341000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-60191000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	582000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	34116000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.29
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.29
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46559
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43564
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39795
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46559
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44025
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40372
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-56702000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	11536000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	42457000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-2963000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-451000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	191000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	323000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	214000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-159000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-3286000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-665000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	350000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1390000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-718000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	655000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1896000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1383000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1005000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-58598000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	10153000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	43462000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3489000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	10954000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8341000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-62087000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-801000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35121000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	884315000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	42457000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1005000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	15764000	USD
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	6977000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	20720000	USD
CY2017	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	4391000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	908000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	921147000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	11536000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1383000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	14784000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	6564000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	9994000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	23309000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	321123000	USD
CY2018	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	53023000	USD
CY2018	gva	Adjustments To Additional Paid In Capital Premium On Convertible Notes AdjustmentsToAdditionalPaidInCapitalPremiumOnConvertibleNotes	30702000	USD
CY2018	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-13075000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	978000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1289354000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-56702000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1896000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	10213000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4067000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	32834000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	24166000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	10444000	USD
CY2019	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-12168000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	777000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1178416000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-56702000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	11536000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	42457000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	123418000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111544000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	66345000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	18703000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	4910000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	4182000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-22924000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12110000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2739000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	10213000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	14784000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	15764000	USD
CY2019	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-120632000	USD
CY2018	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-44689000	USD
CY2017	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-45856000	USD
CY2019	gva	Net Income From Affiliates NetIncomeFromAffiliates	11454000	USD
CY2018	gva	Net Income From Affiliates NetIncomeFromAffiliates	6935000	USD
CY2017	gva	Net Income From Affiliates NetIncomeFromAffiliates	7107000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4020000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4916000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	939000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	58947000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	9247000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	65750000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-0	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-0	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	21607000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	40084000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-11384000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-0	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-380000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2120000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	7252000	USD
CY2019	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	83765000	USD
CY2018	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	104333000	USD
CY2017	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	16937000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	19064000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	16922000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	39955000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3928000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-21619000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-13586000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	140027000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21456000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	37692000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-9809000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-14113000	USD
CY2017	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	11053000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	111438000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	86390000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	146195000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	-0	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	9952000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	124543000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	30000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	75000000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	120000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	106828000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	111101000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	67695000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	37091000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	16238000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10202000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	6227000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	55027000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	47812000	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5642000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2568000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2850000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-40322000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39598000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-59186000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	105574000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	203250000	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	25000000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	230000000	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2017	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	11500000	USD
CY2018	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2019	gva	Payments For Equity Derivative Instrument Net Of Fees PaymentsForEquityDerivativeInstrumentNetOfFees	37375000	USD
CY2018	gva	Payments For Equity Derivative Instrument Net Of Fees PaymentsForEquityDerivativeInstrumentNetOfFees	-0	USD
CY2017	gva	Payments For Equity Derivative Instrument Net Of Fees PaymentsForEquityDerivativeInstrumentNetOfFees	-0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	313150000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	153924000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	45000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24316000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	22424000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20687000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	36900000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16557000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6977000	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	68000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	200000	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	11500000	USD
CY2019	gva	Distributions To Noncontrolling Partners Net DistributionsToNoncontrollingPartnersNet	12235000	USD
CY2018	gva	Distributions To Noncontrolling Partners Net DistributionsToNoncontrollingPartnersNet	13275000	USD
CY2017	gva	Distributions To Noncontrolling Partners Net DistributionsToNoncontrollingPartnersNet	7109000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	6507000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	-0	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	-0	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1704000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	856000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	649000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-81637000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1874000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-42624000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-10521000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44918000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44385000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	278629000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	233711000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	189326000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	268108000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	278629000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	233711000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	25360000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2017	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	18660000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2017	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	17322000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	14864000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	11446000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	11898000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	19069000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	33948000	USD
CY2019	gva	Performance Guarantees PerformanceGuarantees	-6284000	USD
CY2018	gva	Performance Guarantees PerformanceGuarantees	0	USD
CY2017	gva	Performance Guarantees PerformanceGuarantees	5497000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	37375000	USD
CY2019	gva	Restricted Stock Units Issued Net Of Forfeitures RestrictedStockUnitsIssuedNetOfForfeitures	8596000	USD
CY2018	gva	Restricted Stock Units Issued Net Of Forfeitures RestrictedStockUnitsIssuedNetOfForfeitures	13728000	USD
CY2017	gva	Restricted Stock Units Issued Net Of Forfeitures RestrictedStockUnitsIssuedNetOfForfeitures	11505000	USD
CY2019	gva	Dividends Accrued DividendsAccrued	5915000	USD
CY2018	gva	Dividends Accrued DividendsAccrued	6068000	USD
CY2017	gva	Dividends Accrued DividendsAccrued	5183000	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2018	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	321019000	USD
CY2017	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2019	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	0	USD
CY2018	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	53086000	USD
CY2017	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	0	USD
CY2019	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	0	USD
CY2018	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	30702000	USD
CY2017	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	0	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<i>Use of Estimates in the Preparation of Financial Statements</i>: The financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of these financial statements requires management to make estimates that affect the reported amounts of assets and liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Our estimates and related judgments and assumptions are continually evaluated based on available information and experiences; however, actual amounts could differ from those estimates.
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	2500000000	USD
CY2018Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1161000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	278629000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	233711000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	189326000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	262273000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	272804000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	233711000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	5835000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	5825000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	268108000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	278629000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	233711000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-10521000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44918000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44385000	USD
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<i>Concentrations of Credit Risk:</i> Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of cash and cash equivalents, marketable securities, and accounts receivable. We maintain our cash and cash equivalents and our marketable securities with several financial institutions. We invest with high credit quality financial institutions and, by policy, limit the amount of credit exposure to any <em style="font: inherit;">one</em> financial institution. <em style="font: inherit;">None</em> of our customers, including both prime and subcontractor arrangements, had revenue that individually exceeded <em style="font: inherit;">10%</em> of total revenue during the years ended <em style="font: inherit;"> December 31,</em> <em style="font: inherit;">2019</em> and <em style="font: inherit;">2018</em>. The majority of our receivables are from customers concentrated in the United States. <em style="font: inherit;">None</em> of our customers had a receivable balance in excess of <em style="font: inherit;">10%</em> of our total net receivables as of <em style="font: inherit;"> December 31,</em> <em style="font: inherit;">2019</em> and <em style="font: inherit;">2018</em>. We perform ongoing credit evaluations of our customers and generally do <em style="font: inherit;">not</em> require collateral, although the law provides us the ability to file mechanics’ liens on real property improved for private customers in the event of non-payment by such customers. We regularly review our accounts receivable, including past due amounts, to determine their probability of collection. If it is probable that an amount is uncollectible, it is charged to bad debt expense and a corresponding reserve is established in allowance for doubtful accounts. We maintain an allowance for doubtful accounts which has historically been within management’s estimates.
CY2019	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	1200000	USD
CY2018	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	4400000	USD
CY2017	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	7900000	USD
CY2019	gva	Change In Loss Assumptions Potential Effect For General Liability And Workers Compensation ChangeInLossAssumptionsPotentialEffectForGeneralLiabilityAndWorkersCompensation	1000000.0	USD
CY2019	gva	Change In Loss Assumptions Potential Effect For Medical Insurance ChangeInLossAssumptionsPotentialEffectForMedicalInsurance	300000	USD
CY2019	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<i>Performance Guarantees:</i> The agreements with our joint venture partners (“partner(s)”) for both construction joint ventures and line item joint ventures define each partner’s management role and financial responsibility in the project. The amount of operational exposure is generally limited to our stated ownership interest. However, due to the joint and several nature of the performance obligations under the related owner contracts, if any of the partners fail to perform, we and the remaining partners, if any, would be responsible for performance of the outstanding work (i.e., we provide a performance guarantee). We estimate our liability for performance guarantees for our unconsolidated and line item joint ventures using estimated partner bond rates, which are Level <em style="font: inherit;">2</em> inputs, and include them in accrued expenses and other current liabilities with a corresponding increase in equity in construction joint ventures in the consolidated balance sheets. We reassess our liability when and if changes in circumstances occur. The liability and corresponding asset are removed from the consolidated balance sheets upon completion and customer acceptance of the project. Circumstances that could lead to a loss under these agreements beyond our stated ownership interest include the failure of a partner to contribute additional funds to the venture in the event the project incurs a loss or additional costs that we could incur should a partner fail to provide the services and resources that it had committed to provide in the agreement. We are <em style="font: inherit;">not</em> able to estimate amounts that <em style="font: inherit;"> may </em>be required beyond the remaining cost of the work to be performed. These costs could be offset by billings to the customer or by proceeds from our partners’ corporate and/or other guarantees.
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	272804000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Current HeldToMaturitySecuritiesCurrent	30002000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	484753000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	184247000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	88623000	USD
CY2018Q4	gva	Equity In Construction Joint Ventures Current Assets EquityInConstructionJointVenturesCurrentAssets	231365000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	48710000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	1340504000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	549688000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	36098000	USD
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	84354000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	259471000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	30142000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	126893000	USD
CY2018Q4	us-gaap	Assets Assets	2427150000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	47286000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	256757000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	109011000	USD
CY2018Q4	gva	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	324383000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	737437000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	335119000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	4160000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	61080000	USD
CY2018Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	467000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	564559000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-749000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	679453000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1243730000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	45624000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1289354000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2427150000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3287031000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2952191000	USD
CY2018	us-gaap	Gross Profit GrossProfit	334840000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	272776000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	61520000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2958374000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7672000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	8216000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	6082000	USD
CY2018	us-gaap	Interest Expense InterestExpense	14571000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6935000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1666000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	112000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8328000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3208000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	11536000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10954000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	582000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43564
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44025
CY2018	us-gaap	Profit Loss ProfitLoss	11536000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111544000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	4910000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12110000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	14784000	USD
CY2018	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-44689000	USD
CY2018	gva	Net Income From Affiliates NetIncomeFromAffiliates	6935000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4916000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	9247000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-11384000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2120000	USD
CY2018	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	104333000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	16922000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-21619000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21456000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-14113000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	86390000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2679633000	USD
CY2017	us-gaap	Gross Profit GrossProfit	278741000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	220400000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4182000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	62523000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	4742000	USD
CY2017	us-gaap	Interest Expense InterestExpense	10800000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7107000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4699000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5748000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68271000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25814000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	42457000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8341000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	34116000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39795
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40372
CY2017	us-gaap	Profit Loss ProfitLoss	42457000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	66345000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	4182000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2739000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	15764000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.039	pure
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	0	USD
CY2017	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-45856000	USD
CY2017	gva	Net Income From Affiliates NetIncomeFromAffiliates	7107000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	939000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	65750000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	21607000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	7252000	USD
CY2017	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	16937000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	39955000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-13586000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	37692000	USD
CY2017	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	11053000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	146195000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	3499606000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	3425317000	USD
CY2018	gva	Business Acquisitions Pro Forma Profit Loss BusinessAcquisitionsProFormaProfitLoss	62480000	USD
CY2017	gva	Business Acquisitions Pro Forma Profit Loss BusinessAcquisitionsProFormaProfitLoss	-40002000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	51526000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-48343000	USD
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.12
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	-1.06
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.15
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	-1.06
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	105900000	USD
CY2019Q4	gva	Aggregate Affirmative Claim Recovery Estimate Included In Contract Asset And Liability AggregateAffirmativeClaimRecoveryEstimateIncludedInContractAssetAndLiability	71100000	USD
CY2018Q4	gva	Aggregate Affirmative Claim Recovery Estimate Included In Contract Asset And Liability AggregateAffirmativeClaimRecoveryEstimateIncludedInContractAssetAndLiability	45400000	USD
CY2019Q4	gva	Costs In Excess Of Billings And Estimated Earnings CostsInExcessOfBillingsAndEstimatedEarnings	100761000	USD
CY2018Q4	gva	Costs In Excess Of Billings And Estimated Earnings CostsInExcessOfBillingsAndEstimatedEarnings	84714000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3445606000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3287031000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2958374000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	3717228000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	2975609000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	125400000	USD
CY2019Q4	gva	Contract With Customer Retention ContractWithCustomerRetention	110680000	USD
CY2018Q4	gva	Contract With Customer Retention ContractWithCustomerRetention	99533000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	211441000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	184247000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	184247000	USD
CY2019	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	1078884000	USD
CY2019	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	-91301000	USD
CY2019	gva	Contract With Customer Asset Increase Decrease For Billings ContractWithCustomerAssetIncreaseDecreaseForBillings	-923602000	USD
CY2019	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Modification Of Contract ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract	-36787000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	211441000	USD
CY2018	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	925300000	USD
CY2018	us-gaap	Contract With Customer Asset Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination	45353000	USD
CY2018	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	-53472000	USD
CY2018	gva	Contract With Customer Asset Increase Decrease For Billings ContractWithCustomerAssetIncreaseDecreaseForBillings	-823408000	USD
CY2018	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Modification Of Contract ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract	-63132000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	184247000	USD
CY2019Q4	gva	Advance Payments And Billings In Excess Of Costs Incurred AdvancePaymentsAndBillingsInExcessOfCostsIncurred	86736000	USD
CY2018Q4	gva	Advance Payments And Billings In Excess Of Costs Incurred AdvancePaymentsAndBillingsInExcessOfCostsIncurred	101478000	USD
CY2019Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	9001000	USD
CY2018Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	7533000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	95737000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	109011000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	109011000	USD
CY2019	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	-1629377000	USD
CY2019	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	-13910000	USD
CY2019	gva	Contract With Customer Liability Increase Decrease For Billings ContractWithCustomerLiabilityIncreaseDecreaseForBillings	1628464000	USD
CY2019	gva	Contract With Customer Liability Change In Provision For Loss ContractWithCustomerLiabilityChangeInProvisionForLoss	1549000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	95737000	USD
CY2018	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	-1310637000	USD
CY2018	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	7974000	USD
CY2018	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	-32342000	USD
CY2018	gva	Contract With Customer Liability Increase Decrease For Billings ContractWithCustomerLiabilityIncreaseDecreaseForBillings	1351220000	USD
CY2018	gva	Contract With Customer Liability Change In Provision For Loss ContractWithCustomerLiabilityChangeInProvisionForLoss	6544000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	109011000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	547791000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	485081000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	374000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	328000	USD
CY2019Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	547417000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	484753000	USD
CY2019Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	150000000.0	USD
CY2019Q4	gva	Contract Value Of Active Construction Joint Venture Projects ContractValueOfActiveConstructionJointVentureProjects	3400000000	USD
CY2019Q4	gva	Unconsolidated Construction Joint Venture Cash Cash Equivalents And Marketable Securities UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities	179049000	USD
CY2018Q4	gva	Unconsolidated Construction Joint Venture Cash Cash Equivalents And Marketable Securities UnconsolidatedConstructionJointVentureCashCashEquivalentsAndMarketableSecurities	229562000	USD
CY2019Q4	gva	Unconsolidated Construction Joint Venture Other Current Assets UnconsolidatedConstructionJointVentureOtherCurrentAssets	972840000	USD
CY2018Q4	gva	Unconsolidated Construction Joint Venture Other Current Assets UnconsolidatedConstructionJointVentureOtherCurrentAssets	814586000	USD
CY2019Q4	gva	Unconsolidated Construction Joint Venture Assets Noncurrent Assets UnconsolidatedConstructionJointVentureAssetsNoncurrentAssets	207584000	USD
CY2018Q4	gva	Unconsolidated Construction Joint Venture Assets Noncurrent Assets UnconsolidatedConstructionJointVentureAssetsNoncurrentAssets	204090000	USD
CY2019Q4	gva	Unconsolidated Construction Joint Venture Current Liabilities UnconsolidatedConstructionJointVentureCurrentLiabilities	581199000	USD
CY2018Q4	gva	Unconsolidated Construction Joint Venture Current Liabilities UnconsolidatedConstructionJointVentureCurrentLiabilities	525036000	USD
CY2019Q4	gva	Equity In Construction Joint Ventures Current Assets Excluding Deficit In Equity EquityInConstructionJointVenturesCurrentAssetsExcludingDeficitInEquity	116911000	USD
CY2018Q4	gva	Equity In Construction Joint Ventures Current Assets Excluding Deficit In Equity EquityInConstructionJointVenturesCurrentAssetsExcludingDeficitInEquity	168043000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	84176000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	84354000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1459485000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1403356000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	917188000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	853668000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	542297000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	549688000	USD
CY2019	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	101900000	USD
CY2018	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	96400000	USD
CY2017	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	63800000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	3900000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	4400000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	17900000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	17400000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	21792000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	22527000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	899000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	17000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2061000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1790000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1120000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1038000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	21750000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	21792000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	264279000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	259471000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	97946000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-50889000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	47057000	USD
CY2019Q4	gva	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	6773000	USD
CY2019Q4	gva	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	-6339000	USD
CY2019Q4	gva	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	434000	USD
CY2019Q4	gva	Finite Lived Intangible Assets Liabilities Gross FiniteLivedIntangibleAssetsLiabilitiesGross	91173000	USD
CY2019Q4	gva	Finite Lived Intangible Assets Liabilities Accumulated Amortization FiniteLivedIntangibleAssetsLiabilitiesAccumulatedAmortization	-44550000	USD
CY2019Q4	gva	Finite Lived Intangible Assets Liabilities Net FiniteLivedIntangibleAssetsLiabilitiesNet	46623000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	97898000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-32183000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	65715000	USD
CY2018Q4	gva	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	7000000	USD
CY2018Q4	gva	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	-4726000	USD
CY2018Q4	gva	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	2274000	USD
CY2018Q4	gva	Finite Lived Intangible Assets Liabilities Gross FiniteLivedIntangibleAssetsLiabilitiesGross	90898000	USD
CY2018Q4	gva	Finite Lived Intangible Assets Liabilities Accumulated Amortization FiniteLivedIntangibleAssetsLiabilitiesAccumulatedAmortization	-27457000	USD
CY2018Q4	gva	Finite Lived Intangible Assets Liabilities Net FiniteLivedIntangibleAssetsLiabilitiesNet	63441000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18900000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15200000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1700000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	13500000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	10300000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6400000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4400000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4100000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	7900000	USD
CY2019Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	54790000	USD
CY2018Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	58519000	USD
CY2019Q4	gva	Deficits In Unconsolidated Joint Ventures Current DeficitsInUnconsolidatedJointVenturesCurrent	76199000	USD
CY2018Q4	gva	Deficits In Unconsolidated Joint Ventures Current DeficitsInUnconsolidatedJointVenturesCurrent	63323000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	70239000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	78691000	USD
CY2019Q4	gva	Guaranty Liabilities Current GuarantyLiabilitiesCurrent	81929000	USD
CY2018Q4	gva	Guaranty Liabilities Current GuarantyLiabilitiesCurrent	88213000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	54143000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	35637000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	337300000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	324383000	USD
CY2019Q4	gva	Longterm Debt Other LongtermDebtOther	6906000	USD
CY2018Q4	gva	Longterm Debt Other LongtermDebtOther	-845000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	364352000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	382405000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	8244000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	47286000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	356108000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	335119000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	8400000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	8500000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	8500000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	142300000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	231100000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	7900000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	193700000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	18900000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y9M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0397	pure
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	19723000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	18479000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	16291000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	11113000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	6293000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	13434000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	85333000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	9628000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	75705000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	83500000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	20200000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	17800000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	15900000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	13300000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	7700000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	8700000	USD
CY2019	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50	pure
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06	pure
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	16400000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	13400000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12100000	USD
CY2019	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	45029000	USD
CY2018	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	43911	USD
CY2017	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	36784	USD
CY2019	gva	Multiemployer Plans Maximum Percent Funded Status For Red Zone MultiemployerPlansMaximumPercentFundedStatusForRedZone	0.65	pure
CY2019	gva	Multiemployer Plans Maximum Percent Funded Status For Orange Zone MultiemployerPlansMaximumPercentFundedStatusForOrangeZone	0.80	pure
CY2019	gva	Multiemployer Plans Maximum Percent Funded Status For Yellow Zone MultiemployerPlansMaximumPercentFundedStatusForYellowZone	0.80	pure
CY2019	gva	Multiemployer Plans Maximum Percent Funded Status For Green Zone MultiemployerPlansMaximumPercentFundedStatusForGreenZone	0.80	pure
CY2019Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	1224380
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	838819
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CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1233969
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-60191000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	582000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	34116000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46559
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43564
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39795
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	461
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CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46559
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44025
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40372
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.29
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.29
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2019	gva	Share Price Potential Dilutive Effect Minimum SharePricePotentialDilutiveEffectMinimum	31.47
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-72765000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	14243000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	68058000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-4313000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-5915000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	213000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-77078000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8328000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68271000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-5862000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-15970000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23677000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-17731000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	12037000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-938000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-23593000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-3933000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	22739000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	700000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	10000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4800000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3456000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	644000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1699000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-2756000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	654000	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	3101000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	7340000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	606000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-12000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1367000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-535000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-14000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	5973000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	71000	USD
CY2017	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-26000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20376000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3208000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25814000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-16186000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
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CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038	pure
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1163000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.140	pure
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2653000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1128000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.017	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.022	pure
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0	pure
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	0.012	pure
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-951000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.114	pure
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-1368000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.020	pure
CY2019	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	-0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0	pure
CY2018	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	-0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0	pure
CY2017	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	2344000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.034	pure
CY2019	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	733000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.010	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.275	pure
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CY2017	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.043	pure
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.028	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.582	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.049	pure
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CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.023	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0	pure
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.098	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0	pure
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-912000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.012	pure
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-772000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.093	pure
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0	pure
CY2019	gva	Effective Income Tax Rate Reconciliation Capital Loss Expiration EffectiveIncomeTaxRateReconciliationCapitalLossExpiration	0	USD
CY2019	gva	Effective Income Tax Rate Reconciliation Capital Loss Expiration Percent EffectiveIncomeTaxRateReconciliationCapitalLossExpirationPercent	0	pure
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CY2018	gva	Effective Income Tax Rate Reconciliation Capital Loss Expiration Percent EffectiveIncomeTaxRateReconciliationCapitalLossExpirationPercent	1.012	pure
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CY2017	gva	Effective Income Tax Rate Reconciliation Capital Loss Expiration Percent EffectiveIncomeTaxRateReconciliationCapitalLossExpirationPercent	0	pure
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1727000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.022	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.264	pure
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3208000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.385	pure
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25814000	USD
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.378	pure
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-6795000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.816	pure
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
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CY2019	gva	Effective Income Tax Rate Reconciliation Purchase Price Accounting Percent EffectiveIncomeTaxRateReconciliationPurchasePriceAccountingPercent	0.017	pure
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CY2018	gva	Effective Income Tax Rate Reconciliation Purchase Price Accounting Percent EffectiveIncomeTaxRateReconciliationPurchasePriceAccountingPercent	0	pure
CY2017	gva	Effective Income Tax Rate Reconciliation Purchase Price Accounting Amount EffectiveIncomeTaxRateReconciliationPurchasePriceAccountingAmount	0	USD
CY2017	gva	Effective Income Tax Rate Reconciliation Purchase Price Accounting Percent EffectiveIncomeTaxRateReconciliationPurchasePriceAccountingPercent	0	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-7980000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	-95.8	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	7431000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	10.9	pure
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-428000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004	pure
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-11000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002	pure
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1103000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.017	pure
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20376000	USD
CY2019Q4	gva	Deferred Tax Assets Receivables DeferredTaxAssetsReceivables	2776000	USD
CY2018Q4	gva	Deferred Tax Assets Receivables DeferredTaxAssetsReceivables	2726000	USD
CY2019Q4	gva	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	11340000	USD
CY2018Q4	gva	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	11085000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	10498000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	10443000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2574000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	3803000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1084000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1905000	USD
CY2019Q4	gva	Deferred Tax Assets Contract Income Recognition DeferredTaxAssetsContractIncomeRecognition	21402000	USD
CY2018Q4	gva	Deferred Tax Assets Contract Income Recognition DeferredTaxAssetsContractIncomeRecognition	6299000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	72842000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	67984000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	30889000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	31909000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	31909000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2567000	USD
CY2019	gva	Valuation Allowance Deferred Tax Asset Change In Amount Due To Acquisitions ValuationAllowanceDeferredTaxAssetChangeInAmountDueToAcquisitions	-716000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	96080000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	75991000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	49676000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	50009000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	49676000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	50009000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	46404000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	25982000	USD
CY2019Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	72842000	USD
CY2018	gva	Valuation Allowance Deferred Tax Asset Change In Amount Due To Acquisitions ValuationAllowanceDeferredTaxAssetChangeInAmountDueToAcquisitions	36410000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-304000	USD
CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-7068000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	30889000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	31909000	USD
CY2019Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	40400000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	27300000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22400000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	10100000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	11000000.0	USD
CY2019Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	5400000	USD
CY2019Q4	gva	Decrease In Unrecognized Tax Benefits That Would Impact Effective Tax Rate Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateIsReasonablyPossible	3200000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22383000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3171000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3262000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	5812000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	20153000	USD
CY2018Q2	us-gaap	Liabilities Current LiabilitiesCurrent	931305000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	36000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	-0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	3000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	73000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	157000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	195000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	6000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1041000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	781000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	13000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	27303000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22383000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3171000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	600000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1100000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	8800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	8300000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3445606000	USD
CY2019	us-gaap	Gross Profit GrossProfit	221678000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3287031000	USD
CY2018	us-gaap	Gross Profit GrossProfit	334840000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2958374000	USD
CY2017	us-gaap	Gross Profit GrossProfit	278741000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	307981000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	272776000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	220400000	USD
CY2019	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	15299000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	61520000	USD
CY2017	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	18703000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7672000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4182000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5821000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	112000	USD
CY2019Q4	gva	Gross Profit As Percentage Of Revenue GrossProfitAsPercentageOfRevenue	0.058	pure
CY2019Q3	gva	Gross Profit As Percentage Of Revenue GrossProfitAsPercentageOfRevenue	0.110	pure
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5748000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-77078000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8328000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68271000	USD
CY2019Q2	gva	Gross Profit As Percentage Of Revenue GrossProfitAsPercentageOfRevenue	0.054	pure
CY2019Q1	gva	Gross Profit As Percentage Of Revenue GrossProfitAsPercentageOfRevenue	0.002	pure
CY2019Q4	us-gaap	Profit Loss ProfitLoss	-20061000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	551696000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	885587000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1112114000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	866092000	USD
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CY2019Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	81034000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	264112000	USD
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	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2150000	USD
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	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4630000	USD
CY2019Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-103484000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	79090000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	225558000	USD
CY2019Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	33345000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	20426000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	21539000	USD
CY2019Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	8238000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	12329000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	6178000	USD
CY2019Q1	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	26933000	USD
	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	45500000	USD
	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	57280000	USD
CY2019Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	330000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	830000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	13181000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11648000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	32785000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Current HeldToMaturitySecuritiesCurrent	35010000	USD
CY2018Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	5699000	USD
CY2018Q2	us-gaap	Held To Maturity Securities Current HeldToMaturitySecuritiesCurrent	20014000	USD
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	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	946000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	10390000	USD
CY2019Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-40588000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	42477000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	143678000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-11662000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-36364000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-93515000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-26498000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	230259000	USD
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	195515000	USD
CY2018Q1	us-gaap	Held To Maturity Securities Current HeldToMaturitySecuritiesCurrent	39961000	USD
CY2018Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	623123000	USD
CY2018Q1	us-gaap	Goodwill Goodwill	53799000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	598871000	USD
CY2018Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	409708000	USD
CY2018Q3	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	46093000	USD
CY2018Q2	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	61191000	USD
CY2018Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	38682000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	244696000	USD
CY2018Q2	us-gaap	Goodwill Goodwill	254058000	USD
CY2018Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	0	USD
CY2018Q2	us-gaap	Receivables Net Current ReceivablesNetCurrent	497771000	USD
CY2018Q1	us-gaap	Receivables Net Current ReceivablesNetCurrent	335315000	USD
CY2018Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	205958000	USD
CY2018Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	252609000	USD
CY2018Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	165770000	USD
CY2018Q3	us-gaap	Inventory Net InventoryNet	90789000	USD
CY2018Q2	us-gaap	Inventory Net InventoryNet	96024000	USD
CY2018Q1	us-gaap	Inventory Net InventoryNet	71295000	USD
CY2018Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	62988000	USD
CY2018Q2	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	0	USD
CY2018Q1	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	0	USD
CY2018Q3	gva	Equity In Construction Joint Ventures Current Assets EquityInConstructionJointVenturesCurrentAssets	234716000	USD
CY2018Q2	gva	Equity In Construction Joint Ventures Current Assets EquityInConstructionJointVenturesCurrentAssets	215093000	USD
CY2018Q1	gva	Equity In Construction Joint Ventures Current Assets EquityInConstructionJointVenturesCurrentAssets	200310000	USD
CY2018Q3	us-gaap	Other Assets Current OtherAssetsCurrent	32185000	USD
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	47293000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	46122000	USD
CY2018Q3	us-gaap	Assets Current AssetsCurrent	1515028000	USD
CY2018Q2	us-gaap	Assets Current AssetsCurrent	1324319000	USD
CY2018Q1	us-gaap	Assets Current AssetsCurrent	1052354000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	560618000	USD
CY2018Q1	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	67305000	USD
CY2018Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	84840000	USD
CY2018Q2	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	91695000	USD
CY2018Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2018Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2018Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2018Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	25888000	USD
CY2018Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	44892000	USD
CY2018Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	23200000	USD
CY2018Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	143910000	USD
CY2018Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	154009000	USD
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	74382000	USD
CY2018Q3	us-gaap	Assets Assets	2621073000	USD
CY2018Q2	us-gaap	Assets Assets	2529035000	USD
CY2018Q1	us-gaap	Assets Assets	1719430000	USD
CY2018Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	116796000	USD
CY2018Q2	us-gaap	Long Term Debt Current LongTermDebtCurrent	207982000	USD
CY2018Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	47298000	USD
CY2018Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	316917000	USD
CY2018Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	303885000	USD
CY2018Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	227091000	USD
CY2018Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	118986000	USD
CY2018Q2	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	92657000	USD
CY2018Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	70962000	USD
CY2018Q3	gva	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	320713000	USD
CY2018Q2	gva	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	326781000	USD
CY2018Q1	gva	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	268766000	USD
CY2018Q3	us-gaap	Liabilities Current LiabilitiesCurrent	873412000	USD
CY2018Q1	us-gaap	Liabilities Current LiabilitiesCurrent	614117000	USD
CY2018Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	316926000	USD
CY2018Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	280710000	USD
CY2018Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	176011000	USD
CY2018Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	67429000	USD
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	71180000	USD
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	40104000	USD
CY2018Q3	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2018Q2	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	676705000	USD
CY2018Q1	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2018Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2018Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2018Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	5589000	USD
CY2018Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	60717000	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	469000	USD
CY2018Q2	us-gaap	Common Stock Value CommonStockValue	457000	USD
CY2018Q1	us-gaap	Common Stock Value CommonStockValue	400000	USD
CY2018Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	70769000	USD
CY2018Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	572046000	USD
CY2018Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	516680000	USD
CY2018Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	162038000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1841000	USD
CY2018Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1022000	USD
CY2018Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1197000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	738254000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1312610000	USD
CY2018Q1	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	8409000	USD
CY2018Q2	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	26287000	USD
CY2018Q3	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	9334000	USD
CY2018Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	676572000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2904000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	1194731000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	840340000	USD
CY2018Q3	us-gaap	Minority Interest MinorityInterest	45107000	USD
CY2018Q2	us-gaap	Minority Interest MinorityInterest	45410000	USD
CY2018Q1	us-gaap	Minority Interest MinorityInterest	48858000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1357717000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1240141000	USD
CY2018Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	889198000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2621073000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2529035000	USD
CY2018Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1719430000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	551696000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	828313000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1070899000	USD
CY2018Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	507432000	USD
CY2018Q2	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	728889000	USD
CY2018Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	910238000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	44264000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	99424000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	160661000	USD
CY2018Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	61851000	USD
CY2018Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	543000	USD
CY2018Q2	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1505000	USD
CY2018Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	3018000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-25453000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	13925000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	83576000	USD
CY2018Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	1521000	USD
CY2018Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	1173000	USD
CY2018Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	1533000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	2435000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	3203000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	4452000	USD
CY2018Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	224000	USD
CY2018Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3534000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1769000	USD
CY2018Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-268000	USD
CY2018Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	940000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1533000	USD
CY2018Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-958000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2444000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	383000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-26411000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16369000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	83959000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7128000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7599000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12698000	USD
CY2018Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3425000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2207000	USD
CY2018Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-58457000	USD
CY2018Q1	us-gaap	Share Based Compensation ShareBasedCompensation	7772000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-19283000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	8770000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	71261000	USD
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47810
CY2018Q1	us-gaap	Profit Loss ProfitLoss	-19283000	USD
	us-gaap	Profit Loss ProfitLoss	-10513000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	24559000	USD
	us-gaap	Profit Loss ProfitLoss	60748000	USD
CY2018Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	15511000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	43547000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	77816000	USD
CY2018Q1	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	543000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2048000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	5066000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	10193000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	12621000	USD
CY2018Q1	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-6379000	USD
	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	-2883000	USD
	gva	Unconsolidated Construction Joint Venture Net Income Loss UnconsolidatedConstructionJointVentureNetIncomeLoss	6245000	USD
CY2018Q1	gva	Net Income From Affiliates NetIncomeFromAffiliates	-0	USD
	gva	Net Income From Affiliates NetIncomeFromAffiliates	3758000	USD
	gva	Net Income From Affiliates NetIncomeFromAffiliates	5527000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	41672000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-20444000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	5866000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	67836000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.51
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.46
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.51
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39908
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41044
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46308
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39908
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	42004
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	24821000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	154996000	USD
CY2018Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	44813000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	72653000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	249000	USD
CY2018Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	8798000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	9526000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4283000	USD
CY2018Q1	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	26067000	USD
	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	55733000	USD
	gva	Equity In Construction Joint Ventures EquityInConstructionJointVentures	89000000	USD
CY2018Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	4036000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	11201000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	15581000	USD
CY2018Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9133000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5998000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-30728000	USD
CY2018Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-12000000	USD
CY2018Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-9138000	USD
	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	5226000	USD
	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	43150000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-37620000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-75445000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	14743000	USD

Files In Submission

Name	View Source	Status
0001437749-21-003662-index-headers.html	Edgar Link	pending
0001437749-21-003662-index.html	Edgar Link	pending
0001437749-21-003662.txt	Edgar Link	pending
0001437749-21-003662-xbrl.zip	Edgar Link	pending
a1.jpg	Edgar Link	pending
ex_166080.htm	Edgar Link	pending
ex_166081.htm	Edgar Link	pending
ex_166082.htm	Edgar Link	pending
ex_166083.htm	Edgar Link	pending
ex_166084.htm	Edgar Link	pending
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$GVA
GRANITE CONSTRUCTION INC Stock $gva

2019 Q4 Form 10-K Financial Statement

#000143774921003662 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GVA GRANITE CONSTRUCTION INC Stock $gva

2019 Q4 Form 10-K Financial Statement

#000143774921003662 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GVA
GRANITE CONSTRUCTION INC Stock $gva