$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl

$strl Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000087423822000023 Filed on March 01, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$401.3M	$1.582B	$347.2M
YoY Change	15.59%	10.81%	0.19%
Cost Of Revenue	$345.7M	$1.367B	$300.6M
YoY Change	14.99%	10.6%	-3.96%
Gross Profit	$55.67M	$214.8M	$46.60M
YoY Change	19.47%	12.22%	38.78%
Gross Profit Margin	13.87%	13.58%	13.42%
Selling, General & Admin	$25.94M	$78.51M	$20.20M
YoY Change	28.42%	9.95%	2.02%
% of Gross Profit	46.59%	36.56%	43.35%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.865M	$34.20M	$8.200M
YoY Change	8.11%	4.32%	-2.38%
% of Gross Profit	15.92%	15.93%	17.6%
Operating Expenses	$32.02M	$103.6M	$25.70M
YoY Change	24.58%	8.47%	18.98%
Operating Profit	$23.66M	$107.3M	$20.90M
YoY Change	13.2%	13.06%	114.76%
Interest Expense	-$3.675M	-$19.30M	-$6.800M
YoY Change	-45.96%	-33.92%	-9.33%
% of Operating Profit	-15.53%	-17.99%	-32.54%
Other Income/Expense, Net
YoY Change
Pretax Income	$16.11M	$90.02M	$13.80M
YoY Change	16.71%	37.65%	-350.91%
Income Tax	$4.625M	$24.90M	$7.800M
% Of Pretax Income	28.72%	27.66%	56.52%
Net Earnings	$10.91M	$65.12M	$5.800M
YoY Change	88.07%	51.79%	-73.99%
Net Earnings / Revenue	2.72%	4.12%	1.67%
Basic Earnings Per Share		$2.19
Diluted Earnings Per Share	$368.2K	$2.15	$201.4K
COMMON SHARES
Basic Shares Outstanding	28.79M shares	28.60M shares	28.10M shares
Diluted Shares Outstanding		29.10M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$81.84M	$81.84M	$66.20M
YoY Change	23.63%	23.63%	44.86%
Cash & Equivalents	$81.84M	$81.84M	$66.19M
Short-Term Investments
Other Short-Term Assets	$20.49M	$20.49M	$16.31M
YoY Change	25.67%	25.72%	38.3%
Inventory			$85.00M
Prepaid Expenses
Receivables	$315.5M	$315.5M	$177.4M
Other Receivables	$16.90M	$16.90M	$16.70M
Total Short-Term Assets	$434.7M	$434.7M	$361.5M
YoY Change	20.23%	20.25%	9.47%
LONG-TERM ASSETS
Property, Plant & Equipment	$228.8M	$228.8M	$143.2M
YoY Change	59.8%	59.8%	23.42%
Goodwill	$259.8M		$192.0M
YoY Change	35.3%		0.06%
Intangibles	$303.2M		$244.9M
YoY Change	23.82%		-4.46%
Long-Term Investments
YoY Change
Other Assets	$4.455M	$4.455M	$11.07M
YoY Change	-59.75%	-59.86%	5947.54%
Total Long-Term Assets	$796.3M	$796.3M	$591.2M
YoY Change	34.7%	34.69%	-2.2%
TOTAL ASSETS
Total Short-Term Assets	$434.7M	$434.7M	$361.5M
Total Long-Term Assets	$796.3M	$796.3M	$591.2M
Total Assets	$1.231B	$1.231B	$952.7M
YoY Change	29.21%	29.21%	1.93%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$145.0M	$145.0M	$95.20M
YoY Change	52.29%	52.29%	-30.81%
Accrued Expenses	$31.64M	$31.64M	$25.60M
YoY Change	23.61%	23.61%	23.08%
Deferred Revenue	$127.9M		$114.0M
YoY Change	12.2%		97.4%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$28.23M	$28.23M	$77.43M
YoY Change	-63.54%	-63.53%	82.31%
Total Short-Term Liabilities	$351.8M	$351.8M	$321.9M
YoY Change	9.28%	9.28%	20.89%
LONG-TERM LIABILITIES
Long-Term Debt	$428.6M	$428.6M	$291.2M
YoY Change	47.16%	47.18%	-25.44%
Other Long-Term Liabilities	$4.819M	$75.77M	$10.58M
YoY Change	-54.47%	7.01%	1609.85%
Total Long-Term Liabilities	$433.4M	$504.4M	$301.8M
YoY Change	43.59%	39.32%	-22.85%
TOTAL LIABILITIES
Total Short-Term Liabilities	$351.8M	$351.8M	$321.9M
Total Long-Term Liabilities	$433.4M	$504.4M	$301.8M
Total Liabilities	$870.8M	$872.2M	$684.0M
YoY Change	27.31%	27.26%	-4.14%
SHAREHOLDERS EQUITY
Retained Earnings	$79.92M		$17.27M
YoY Change	362.68%		-169.0%
Common Stock	$298.0K		$283.0K
YoY Change	5.3%		0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00		$1.445M
YoY Change	-100.0%		-76.47%
Treasury Stock Shares	0.000 shares		95.00K shares
Shareholders Equity	$358.8M	$358.8M	$267.3M
YoY Change
Total Liabilities & Shareholders Equity	$1.231B	$1.231B	$952.7M
YoY Change	29.21%	29.21%	1.93%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$10.91M	$65.12M	$5.800M
YoY Change	88.07%	51.79%	-73.99%
Depreciation, Depletion And Amortization	$8.865M	$34.20M	$8.200M
YoY Change	8.11%	4.32%	-2.38%
Cash From Operating Activities	$15.85M	$151.6M	$28.40M
YoY Change	-44.18%	25.38%	-12.88%
INVESTING ACTIVITIES
Capital Expenditures	-$7.336M	$46.65M	-$10.80M
YoY Change	-32.07%	41.95%	44.0%
Acquisitions		$180.9M
YoY Change
Other Investing Activities	-$178.9M	-$176.8M	$800.0K
YoY Change	-22461.38%	-7466.58%	-100.2%
Cash From Investing Activities	-$186.2M	-$223.4M	-$10.00M
YoY Change	1762.27%	632.84%	-97.52%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net		$48.27M
YoY Change		-37.91%
Cash From Financing Activities	134.7M	$87.91M	-24.70M
YoY Change	-645.15%	-228.63%	-107.26%
NET CHANGE
Cash From Operating Activities	15.85M	$151.6M	28.40M
Cash From Investing Activities	-186.2M	-$223.4M	-10.00M
Cash From Financing Activities	134.7M	$87.91M	-24.70M
Net Change In Cash	-35.72M	$16.05M	-6.300M
YoY Change	467.03%	-27.31%	-79.61%
FREE CASH FLOW
Cash From Operating Activities	$15.85M	$151.6M	$28.40M
Capital Expenditures	-$7.336M	$46.65M	-$10.80M
Free Cash Flow	$23.19M	$104.9M	$39.20M
YoY Change	-40.85%	19.19%	-2.24%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000874238
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	1800 Hughes Landing Blvd.
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	The Woodlands
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2020Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtCurrent
CY2021Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtCurrent
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtNoncurrent
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtNoncurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-31993
CY2021	dei	Entity Registrant Name EntityRegistrantName	STERLING CONSTRUCTION COMPANY, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	25-1655321
CY2021	us-gaap	Gross Profit GrossProfit	214757000	USD
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77380
CY2021	dei	City Area Code CityAreaCode	281
CY2021	dei	Local Phone Number LocalPhoneNumber	214-0777
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2021	dei	Trading Symbol TradingSymbol	STRL
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	670600000	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	29838802	shares
CY2021	dei	Auditor Firm AuditorFirmId	248
CY2021	dei	Auditor Name AuditorName	GRANT THORNTON LLP
CY2021	dei	Auditor Location AuditorLocation	Houston, Texas
CY2021	dei	Auditor Name AuditorName	GRANT THORNTON LLP
CY2021	dei	Auditor Location AuditorLocation	Houston, Texas
CY2021	dei	Auditor Location AuditorLocation	Houston, Texas
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1581766000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1427412000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1126278000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1367009000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1236043000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1018484000	USD
CY2020	us-gaap	Gross Profit GrossProfit	191369000	USD
CY2019	us-gaap	Gross Profit GrossProfit	107794000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	78506000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	71415000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	49200000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11464000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11436000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4695000	USD
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3877000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1026000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4311000	USD
CY2021	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-13623000	USD
CY2020	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-12600000	USD
CY2019	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-11837000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	107287000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	94892000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	37751000	USD
CY2021	us-gaap	Interest Income Other InterestIncomeOther	52000	USD
CY2020	us-gaap	Interest Income Other InterestIncomeOther	161000	USD
CY2019	us-gaap	Interest Income Other InterestIncomeOther	1142000	USD
CY2021	strl	Interest Expense And Accreted Interest InterestExpenseAndAccretedInterest	19348000	USD
CY2020	strl	Interest Expense And Accreted Interest InterestExpenseAndAccretedInterest	29377000	USD
CY2019	strl	Interest Expense And Accreted Interest InterestExpenseAndAccretedInterest	16686000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	2032000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-301000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-7728000	USD
CY2021	strl	Income Before Income Taxes And Earnings Attributable To Noncontrolling Interests IncomeBeforeIncomeTaxesAndEarningsAttributableToNoncontrollingInterests	90023000	USD
CY2020	strl	Income Before Income Taxes And Earnings Attributable To Noncontrolling Interests IncomeBeforeIncomeTaxesAndEarningsAttributableToNoncontrollingInterests	65375000	USD
CY2019	strl	Income Before Income Taxes And Earnings Attributable To Noncontrolling Interests IncomeBeforeIncomeTaxesAndEarningsAttributableToNoncontrollingInterests	14479000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24900000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22471000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-26216000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	65123000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	42904000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	40695000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2478000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	598000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	794000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	62645000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	42306000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39901000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.50
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.15
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.50
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28600000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27859000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26671000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	29101000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28195000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27119000	shares
CY2021	us-gaap	Profit Loss ProfitLoss	65123000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	42904000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	40695000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3541000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-5055000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-209000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	68664000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	37849000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	40486000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2478000	USD
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CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	794000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	66186000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	37251000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	39692000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	81840000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	66185000	USD
CY2021Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	232153000	USD
CY2020Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	177424000	USD
CY2021Q4	us-gaap	Capitalized Contract Cost Gross CapitalizedContractCostGross	83310000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Gross CapitalizedContractCostGross	84975000	USD
CY2021Q4	strl	Receivables From And Equity In Construction Joint Venture ReceivablesFromAndEquityInConstructionJointVenture	16896000	USD
CY2020Q4	strl	Receivables From And Equity In Construction Joint Venture ReceivablesFromAndEquityInConstructionJointVenture	16653000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	20492000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	16306000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	434691000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	361543000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	204316000	USD
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CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	244887000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4455000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	11067000	USD
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CY2020Q4	us-gaap	Assets Assets	952694000	USD
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CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	7588000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22803000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	18013000	USD
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	18972000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	9629000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	351760000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	321884000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	428588000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	291249000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	15831000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8958000	USD
CY2021Q4	strl	Members Interest Subject To Mandatory Redemption And Undistributed Earnings MembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	55115000	USD
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CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	10688000	USD
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CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	50562000	USD
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CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72642000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	50562000	USD
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	6853000	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	6457000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	4829000	USD
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CY2019	strl	Business Combination Consideration Transferred Tax Gross Up Payment And Other Payments Due To Sellers BusinessCombinationConsiderationTransferredTaxGrossUpPaymentAndOtherPaymentsDueToSellers	5015000	USD
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CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	66185000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45733000	USD
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CY2021	strl	Business Combination Consideration Transferred Tax Gross Up Payment And Other Payments Due To Sellers BusinessCombinationConsiderationTransferredTaxGrossUpPaymentAndOtherPaymentsDueToSellers	10833000	USD
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CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	152000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1109000	USD
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CY2020	us-gaap	Profit Loss ProfitLoss	42904000	USD
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CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	11643000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	432000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	530000	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1985000	USD
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CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	268729000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	65123000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3541000	USD
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CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2477000	USD
CY2021	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	20406000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	475000	USD
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	7338000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	-3000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	360227000	USD
CY2021	us-gaap	Nature Of Operations NatureOfOperations	<div style="margin-bottom:4pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:60.672%"><tr><td style="width:1.0%"/><td style="width:5.406%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:92.394%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">1.</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">NATURE OF OPERATIONS</span></td></tr></table></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Business Summary</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Sterling Construction Company, Inc., (“Sterling,” “the Company,” “we,” “our” or “us”), a Delaware corporation, operates through a variety of subsidiaries within three segments specializing in Transportation, E-Infrastructure and Building Solutions in the United States (the “U.S.”), primarily across the Southern, Northeastern and Mid-Atlantic U.S., the Rocky Mountain States, California and Hawaii, as well as other areas with strategic construction opportunities. Transportation Solutions includes infrastructure and rehabilitation projects for highways, roads, bridges, airports, ports, light rail, water, wastewater and storm drainage systems. E-Infrastructure Solutions projects develop advanced, large-scale site development systems and services for data centers, e-commerce distribution centers, warehousing, transportation, energy and more. Building Solutions projects include residential and commercial concrete foundations for single-family and multi-family homes, parking structures, elevated slabs and other concrete work. From strategy to operations, we are committed to sustainability by operating responsibly to safeguard and improve society’s quality of life. Caring for our people and our communities, our customers and our investors – that is The Sterling Way.</span></div>
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
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CY2020Q2	strl	Consolidated50 Owned Subsidiaries Number Of Entities Consolidated50OwnedSubsidiariesNumberOfEntities	2	entity
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	347584000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	259727000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	143268000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	133059000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	204316000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	126668000	USD
CY2021	us-gaap	Depreciation Depreciation	22737000	USD
CY2020	us-gaap	Depreciation Depreciation	21349000	USD
CY2019	us-gaap	Depreciation Depreciation	16045000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	259791000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	192014000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	259791000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	192014000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	375397000	USD
CY2021	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P24Y
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	335017000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	31794000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	265217000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	20330000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11464000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11436000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4695000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	14100000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	14000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	13800000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	13500000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	13500000	USD
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	462197000	USD
CY2021Q4	strl	Longterm Debt Current Maturities Gross LongtermDebtCurrentMaturitiesGross	28230000	USD
CY2020Q4	strl	Longterm Debt Current Maturities Gross LongtermDebtCurrentMaturitiesGross	77434000	USD
CY2021Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	5379000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	6714000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	428588000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	291249000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2242000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2920000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2307000	USD
CY2020Q2	strl	Consolidated50 Owned Subsidiaries Number Of Entities Consolidated50OwnedSubsidiariesNumberOfEntities	2	entity
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2020Q2	strl	Consolidated50 Owned Subsidiaries Number Of Entities Consolidated50OwnedSubsidiariesNumberOfEntities	2	entity
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q2	strl	Number Of Loans Received Cares Act NumberOfLoansReceivedCARESAct	3	loan
CY2020Q2	strl	Loans Receivable Cares Act LoansReceivableCARESAct	9800000	USD
CY2021	strl	Number Of Loans Received Cares Act NumberOfLoansReceivedCARESAct	2	loan
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	445000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-102000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	343000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-10103000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	2273000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-7830000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-4141000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	943000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-3198000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-3555000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	780000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-2775000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	4586000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-1045000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3541000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-6548000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	1493000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-5055000	USD
CY2021	strl	Lessee Lease Termination Period LesseeLeaseTerminationPeriod	P10Y
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	8333000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	8541000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	13438000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	13109000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	196000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	204000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	20000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	28000	USD
CY2021	us-gaap	Lease Cost LeaseCost	216000	USD
CY2020	us-gaap	Lease Cost LeaseCost	232000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	8365000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	8296000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	20000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	28000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	196000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	204000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	15085000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	8450000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	24520000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	16515000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	8841000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	7588000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	15831000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8958000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24672000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16546000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	1479000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	1479000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	907000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	702000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	572000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	777000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	148000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	188000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	224000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	372000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	372000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	560000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y4M24D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y6M
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.057
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.043
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.042
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	8971000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	161000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6118000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	154000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3957000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	77000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2464000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1960000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	4872000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	28342000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	392000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3670000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	20000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24672000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	372000	USD
CY2021	strl	General Liability And Workers Compensation Claim Per Occurrence That Would Affect Ultimate Liability GeneralLiabilityAndWorkersCompensationClaimPerOccurrenceThatWouldAffectUltimateLiability	100000	USD
CY2021	strl	Self Insurance General Liability Amount Per Occurrence SelfInsuranceGeneralLiabilityAmountPerOccurrence	350000	USD
CY2021	strl	Self Insurance Workers Compensation Claims Maximum Liability SelfInsuranceWorkersCompensationClaimsMaximumLiability	4000000	USD
CY2021Q4	strl	Commercial Insurance Coverage CommercialInsuranceCoverage	75000000	USD
CY2021Q4	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3472000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3032000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1182000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	21428000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	19439000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27398000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24900000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22471000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-26216000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18905000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13729000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3041000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5543000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.062
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5149000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.079
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1670000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.115
CY2021	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	521000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.006
CY2020	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	141000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.002
CY2019	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	2241000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.155
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-29375000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2.029
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1698000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.019
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1881000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.029
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	805000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.056
CY2021	strl	Effective Income Tax Rate Reconciliation Other Permanent Differences EffectiveIncomeTaxRateReconciliationOtherPermanentDifferences	-0.008
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-725000	USD
CY2019	strl	Effective Income Tax Rate Reconciliation Other Permanent Differences EffectiveIncomeTaxRateReconciliationOtherPermanentDifferences	-0.008
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1853000	USD
CY2020	strl	Effective Income Tax Rate Reconciliation Other Permanent Differences EffectiveIncomeTaxRateReconciliationOtherPermanentDifferences	0.028
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-116000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24900000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.277
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22471000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.344
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-26216000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-1.811
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	5322000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	4743000	USD
CY2021Q4	strl	Deferred Tax Assets Noncontrolling Interest DeferredTaxAssetsNoncontrollingInterest	2626000	USD
CY2020Q4	strl	Deferred Tax Assets Noncontrolling Interest DeferredTaxAssetsNoncontrollingInterest	1860000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	9209000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	9131000	USD
CY2021Q4	strl	Deferred Tax Assets Right Of Use Liability DeferredTaxAssetsRightOfUseLiability	5762000	USD
CY2020Q4	strl	Deferred Tax Assets Right Of Use Liability DeferredTaxAssetsRightOfUseLiability	3687000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	515000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	1557000	USD
CY2021Q4	strl	Deferred Tax Assets Deferred Payments DeferredTaxAssetsDeferredPayments	1127000	USD
CY2020Q4	strl	Deferred Tax Assets Deferred Payments DeferredTaxAssetsDeferredPayments	2223000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	8955000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	14316000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	33516000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	37517000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	26974000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	16490000	USD
CY2021Q4	strl	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	5727000	USD
CY2020Q4	strl	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	3680000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	10772000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	7099000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4699000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2431000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	48172000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	29700000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	14656000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7817000	USD
CY2021	strl	Class Of Warrant Or Right Number Of Warrants Exercised ClassOfWarrantOrRightNumberOfWarrantsExercised	530000	shares
CY2021	strl	Stock Issued During Period Shares Warrants Exercised StockIssuedDuringPeriodSharesWarrantsExercised	315000	shares
CY2021	strl	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	8082000	USD
CY2020	strl	Class Of Warrant Or Right Number Of Warrants Exercised ClassOfWarrantOrRightNumberOfWarrantsExercised	470000	shares
CY2020	strl	Stock Issued During Period Shares Warrants Exercised StockIssuedDuringPeriodSharesWarrantsExercised	110000	shares
CY2020	strl	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	1477000	USD
CY2019	strl	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
CY2021Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	0	shares
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	62645000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	42306000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39901000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28600000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27859000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26671000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	501000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	336000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	448000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	29101000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28195000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27119000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.50
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.15
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.50
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3766000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3250000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2842000	USD
CY2021Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	2900	employee
CY2021Q4	strl	Entity Numberof Employees Field Personnel EntityNumberofEmployeesFieldPersonnel	2200	employee
CY2021	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	2149000	USD
CY2020	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	1829000	USD
CY2019	us-gaap	Multiemployer Plan Employer Contribution Cost MultiemployerPlanEmployerContributionCost	1706000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-8300000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-8552000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-21300000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-12906000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-65963000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-6023000	USD
CY2021	strl	Increase Decrease In Receivables From And Equity In Construction Joint Ventures IncreaseDecreaseInReceivablesFromAndEquityInConstructionJointVentures	243000	USD
CY2020	strl	Increase Decrease In Receivables From And Equity In Construction Joint Ventures IncreaseDecreaseInReceivablesFromAndEquityInConstructionJointVentures	7457000	USD
CY2019	strl	Increase Decrease In Receivables From And Equity In Construction Joint Ventures IncreaseDecreaseInReceivablesFromAndEquityInConstructionJointVentures	-1524000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4533000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	6233000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1017000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	26605000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-42392000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	10987000	USD
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-7508000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	8260000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-839000	USD
CY2021	strl	Increase Decrease In Members Interest Subject To Mandatory Redemption And Undistributed Earnings IncreaseDecreaseInMembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	1362000	USD
CY2020	strl	Increase Decrease In Members Interest Subject To Mandatory Redemption And Undistributed Earnings IncreaseDecreaseInMembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	2287000	USD
CY2019	strl	Increase Decrease In Members Interest Subject To Mandatory Redemption And Undistributed Earnings IncreaseDecreaseInMembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	-340000	USD
CY2021	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-20289000	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-11876000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	2928000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	34201000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	32785000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20740000	USD
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3877000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1026000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4311000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	107287000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	94892000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	37751000	USD
CY2021Q4	us-gaap	Assets Assets	1230996000	USD
CY2020Q4	us-gaap	Assets Assets	952694000	USD

Files In Submission

Name	View Source	Status
0000874238-22-000023-index-headers.html	Edgar Link	pending
0000874238-22-000023-index.html	Edgar Link	pending
0000874238-22-000023.txt	Edgar Link	pending
0000874238-22-000023-xbrl.zip	Edgar Link	pending
a2021123110-kexhibit211q4.htm	Edgar Link	pending
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Financial_Report.xlsx	Edgar Link	pending
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STERLING INFRASTRUCTURE, INC. Stock $strl

2021 Q4 Form 10-K Financial Statement

#000087423822000023 Filed on March 01, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL STERLING INFRASTRUCTURE, INC. Stock $strl

2021 Q4 Form 10-K Financial Statement

#000087423822000023 Filed on March 01, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl