$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl

$strl Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000087423821000028 Filed on May 04, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$315.3M	$296.7M
YoY Change	6.28%	32.48%
Cost Of Revenue	$270.3M	$261.4M
YoY Change	3.38%	27.88%
Gross Profit	$45.03M	$35.25M
YoY Change	27.77%	80.72%
Gross Profit Margin	14.28%	11.88%
Selling, General & Admin	$17.10M	$17.60M
YoY Change	-2.84%	40.8%
% of Gross Profit	37.97%	49.94%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.305M	$8.285M
YoY Change	0.24%	92.58%
% of Gross Profit	18.44%	23.51%
Operating Expenses	$22.30M	$22.70M
YoY Change	-1.76%	53.38%
Operating Profit	$22.76M	$12.10M
YoY Change	88.01%	156.42%
Interest Expense	-$6.000M	-$7.700M
YoY Change	-22.08%	185.19%
% of Operating Profit	-26.37%	-63.62%
Other Income/Expense, Net
YoY Change
Pretax Income	$16.40M	$4.400M
YoY Change	272.73%	120.0%
Income Tax	$4.760M	$1.184M
% Of Pretax Income	29.02%	26.91%
Net Earnings	$11.67M	$3.215M
YoY Change	262.92%	72.76%
Net Earnings / Revenue	3.7%	1.08%
Basic Earnings Per Share	$0.37	$0.11
Diluted Earnings Per Share	$0.37	$0.11
COMMON SHARES
Basic Shares Outstanding	28.28M shares	27.74M shares
Diluted Shares Outstanding	28.76M shares	27.99M shares

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$61.40M	$73.90M
YoY Change	-16.91%	30.11%
Cash & Equivalents	$61.40M	$73.91M
Short-Term Investments
Other Short-Term Assets	$15.37M	$10.34M
YoY Change	48.68%	54.35%
Inventory	$90.10M	$54.80M
Prepaid Expenses
Receivables	$170.2M	$221.3M
Other Receivables	$18.20M	$10.80M
Total Short-Term Assets	$355.2M	$371.1M
YoY Change	-4.27%	37.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$151.2M	$117.8M
YoY Change	28.33%	126.53%
Goodwill	$192.0M	$191.9M
YoY Change	0.06%	125.14%
Intangibles	$242.0M	$253.5M
YoY Change	-4.52%	506.16%
Long-Term Investments
YoY Change
Other Assets	$3.310M	$172.0K
YoY Change	1824.42%	-30.08%
Total Long-Term Assets	$592.0M	$605.3M
YoY Change	-2.2%	211.06%
TOTAL ASSETS
Total Short-Term Assets	$355.2M	$371.1M
Total Long-Term Assets	$592.0M	$605.3M
Total Assets	$947.2M	$976.4M
YoY Change	-2.99%	110.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$111.1M	$123.2M
YoY Change	-9.78%	50.45%
Accrued Expenses	$29.80M	$21.60M
YoY Change	37.96%	23.43%
Deferred Revenue	$111.2M	$79.29M
YoY Change	40.28%	42.62%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$59.96M	$50.21M
YoY Change	19.42%	12676.34%
Total Short-Term Liabilities	$322.2M	$286.3M
YoY Change	12.54%	76.74%
LONG-TERM LIABILITIES
Long-Term Debt	$279.2M	$408.8M
YoY Change	-31.71%	431.48%
Other Long-Term Liabilities	$10.29M	$5.654M
YoY Change	81.91%	407.09%
Total Long-Term Liabilities	$289.5M	$414.5M
YoY Change	-30.16%	431.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$322.2M	$286.3M
Total Long-Term Liabilities	$289.5M	$414.5M
Total Liabilities	$671.5M	$757.5M
YoY Change	-11.35%	154.84%
SHAREHOLDERS EQUITY
Retained Earnings	$27.83M	-$21.92M
YoY Change	-226.96%	-65.28%
Common Stock	$286.0K	$283.0K
YoY Change	1.06%	4.43%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$4.247M
YoY Change	-100.0%	-40.87%
Treasury Stock Shares	0.000 shares	316.0K shares
Shareholders Equity	$275.1M	$217.5M
YoY Change
Total Liabilities & Shareholders Equity	$947.2M	$976.4M
YoY Change	-2.99%	110.65%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$11.67M	$3.215M
YoY Change	262.92%	72.76%
Depreciation, Depletion And Amortization	$8.305M	$8.285M
YoY Change	0.24%	92.58%
Cash From Operating Activities	$38.09M	$10.77M
YoY Change	253.63%	-155.98%
INVESTING ACTIVITIES
Capital Expenditures	$11.21M	$7.354M
YoY Change	52.42%	92.82%
Acquisitions
YoY Change
Other Investing Activities	$200.0K	$500.0K
YoY Change	-60.0%	400.0%
Cash From Investing Activities	-$11.00M	-$6.842M
YoY Change	60.79%	86.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net	$30.54M	$5.082M
YoY Change	501.0%	-9.41%
Cash From Financing Activities	-$32.50M	$24.24M
YoY Change	-234.07%	-268.21%
NET CHANGE
Cash From Operating Activities	$38.09M	$10.77M
Cash From Investing Activities	-$11.00M	-$6.842M
Cash From Financing Activities	-$32.50M	$24.24M
Net Change In Cash	-$5.413M	$28.17M
YoY Change	-119.21%	-175.47%
FREE CASH FLOW
Cash From Operating Activities	$38.09M	$10.77M
Capital Expenditures	$11.21M	$7.354M
Free Cash Flow	$26.88M	$3.417M
YoY Change	686.68%	-114.82%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000874238
CY2021Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2021Q1	dei	Amendment Flag AmendmentFlag	false
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CY2021Q1	dei	Document Type DocumentType	10-Q
CY2021Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q1	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2021Q1	dei	Entity File Number EntityFileNumber	1-31993
CY2021Q1	dei	Entity Registrant Name EntityRegistrantName	STERLING CONSTRUCTION COMPANY, INC.
CY2021Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	25-1655321
CY2021Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	1800 Hughes Landing Blvd.
CY2021Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	The Woodlands
CY2021Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2021Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77380
CY2021Q1	dei	City Area Code CityAreaCode	281
CY2021Q1	dei	Local Phone Number LocalPhoneNumber	214-0800
CY2021Q1	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2021Q1	dei	Trading Symbol TradingSymbol	STRL
CY2021Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q1	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2021Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2021Q1	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	68000	USD
CY2020Q1	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	393000	USD
CY2021Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-337000	USD
CY2020Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4142000	USD
CY2020Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	913000	USD
CY2021Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1835000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2234000	USD
CY2021Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	22000	USD
CY2020Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-171000	USD
CY2021Q1	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-11863000	USD
CY2020Q1	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	4676000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	38720000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10771000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11209000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7354000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	208000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	512000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-11001000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6842000	USD
CY2021Q1	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2020Q1	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	30000000	USD
CY2021Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	30543000	USD
CY2020Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5082000	USD
CY2021Q1	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	1959000	USD
CY2020Q1	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2021Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2020Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-675000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32502000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	24243000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4783000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28172000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	66185000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45733000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61402000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	73905000	USD
CY2021Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3131000	USD
CY2020Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	0	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	268729000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	11668000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	895000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1835000	USD
CY2021Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1959000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	144000	USD
CY2021Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5619000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	275693000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	221211000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	3215000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-7061000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	2234000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	103000	USD
CY2020Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	772000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	218930000	USD
CY2021Q1	us-gaap	Nature Of Operations NatureOfOperations	<div style="margin-bottom:10pt;margin-top:8pt;text-align:justify"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:88.157%"><tr><td style="width:1.0%"/><td style="width:2.050%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:79.165%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:15.485%"/><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><td colspan="3" style="padding:0 1pt"/></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 Heavy Civil, Specialty Services and Residential projects in the United States (the “U.S.”), primarily across the southern U.S., the Rocky Mountain States, California and Hawaii, as well as other areas with strategic construction opportunities. Heavy Civil includes infrastructure and rehabilitation projects for highways, roads, bridges, airfields, ports, light rail, water, wastewater and storm drainage systems. Specialty Services projects include land development activities (including site excavation and drainage, drilling and blasting for excavation), foundations for multi-family homes, parking structures and other commercial concrete projects. Residential projects include concrete foundations for single-family homes.</span></div>
CY2021Q1	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Estimates and Judgments—</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the accompanying Condensed Consolidated Financial Statements in conformance with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Certain accounting estimates of the Company require a higher degree of judgment than others in their application. These include the recognition of revenue and earnings from construction contracts over time, the valuation of long-lived assets, goodwill and purchase accounting estimates. Management continually evaluates all of its estimates and judgments based on available information and experience; however, actual results could differ from these estimates.</span>
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2021Q1	strl	Contract With Customer Retainage Asset Current ContractWithCustomerRetainageAssetCurrent	43824000	USD
CY2020Q4	strl	Contract With Customer Retainage Asset Current ContractWithCustomerRetainageAssetCurrent	44412000	USD
CY2021Q1	strl	Contract With Customer Retainage Liability Current ContractWithCustomerRetainageLiabilityCurrent	35832000	USD
CY2020Q4	strl	Contract With Customer Retainage Liability Current ContractWithCustomerRetainageLiabilityCurrent	33856000	USD
CY2021Q1	strl	Contracts Receivable Retainage Percentage Estimated To Be Collected In Next Fiscal Year ContractsReceivableRetainagePercentageEstimatedToBeCollectedInNextFiscalYear	0.69
CY2021Q1	strl	Contract With Customer Liability Revenue Recognized During The Period ContractWithCustomerLiabilityRevenueRecognizedDuringThePeriod	155558000	USD
CY2020Q1	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	146266000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1639222000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1175388000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.52
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	315316000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	296688000	USD
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	315316000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	296688000	USD
CY2021Q1	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q1	strl	Consolidated50 Owned Subsidiaries Number Of Entities Consolidated50OwnedSubsidiariesNumberOfEntities	2	entity
CY2021Q1	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q1	strl	Members Interest Subject To Mandatory Redemption MembersInterestSubjectToMandatoryRedemption	40000000	USD
CY2021Q1	strl	Death And Disability Insurance Policies Per Policy Amount DeathAndDisabilityInsurancePoliciesPerPolicyAmount	20000000	USD
CY2021Q1	strl	Members Interest Subject To Mandatory Redemption MembersInterestSubjectToMandatoryRedemption	40000000	USD
CY2020Q4	strl	Members Interest Subject To Mandatory Redemption MembersInterestSubjectToMandatoryRedemption	40000000	USD
CY2021Q1	strl	Undistributed Earnings Of Domestic Subsidiaries Net UndistributedEarningsOfDomesticSubsidiariesNet	11615000	USD
CY2020Q4	strl	Undistributed Earnings Of Domestic Subsidiaries Net UndistributedEarningsOfDomesticSubsidiariesNet	11290000	USD
CY2021Q1	strl	Members Interest Subject To Mandatory Redemption And Undistributed Earnings MembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	51615000	USD
CY2020Q4	strl	Members Interest Subject To Mandatory Redemption And Undistributed Earnings MembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	51290000	USD
CY2021Q1	strl	Consolidated50 Owned Subsidiaries Number Of Entities Consolidated50OwnedSubsidiariesNumberOfEntities	2	entity
CY2021Q1	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	273235000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	259727000	USD
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	137807000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	133059000	USD
CY2021Q1	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	135428000	USD
CY2021Q1	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	135428000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	126668000	USD
CY2021Q1	us-gaap	Depreciation Depreciation	5439000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	5448000	USD
CY2021Q1	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P24Y
CY2021Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	265217000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	23196000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	265217000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	20330000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2866000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2837000	USD
CY2021Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	344854000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	375397000	USD
CY2021Q1	strl	Longterm Debt Current Maturities Gross LongtermDebtCurrentMaturitiesGross	59962000	USD
CY2020Q4	strl	Longterm Debt Current Maturities Gross LongtermDebtCurrentMaturitiesGross	77434000	USD
CY2021Q1	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	5717000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	6714000	USD
CY2021Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	279175000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	291249000	USD
CY2021Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	660000	USD
CY2020Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	752000	USD
CY2021Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-337000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	126000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-29000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	97000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-9174000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	2064000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-7110000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-1034000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	236000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-798000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-63000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	14000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-49000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	1160000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-265000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	895000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-9111000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	2050000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-7061000	USD
CY2021Q1	strl	Lessee Lease Termination Period LesseeLeaseTerminationPeriod	P10Y
CY2021Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	1512000	USD
CY2020Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	2159000	USD
CY2021Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2124000	USD
CY2020Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3281000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	50000	USD
CY2020Q1	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	56000	USD
CY2021Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	6000	USD
CY2020Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	8000	USD
CY2021Q1	us-gaap	Lease Cost LeaseCost	56000	USD
CY2020Q1	us-gaap	Lease Cost LeaseCost	64000	USD
CY2021Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1518000	USD
CY2020Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	2105000	USD
CY2021Q1	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	6000	USD
CY2020Q1	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	8000	USD
CY2021Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	50000	USD
CY2020Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	56000	USD
CY2021Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	896000	USD
CY2020Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3540000	USD
CY2021Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2020Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15804000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	16515000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	7627000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	7588000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8202000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8958000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	15829000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16546000	USD
CY2021Q1	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
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	754000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	702000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	725000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	777000	USD
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	179000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	188000	USD
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	330000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	372000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	509000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	560000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y2M12D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.056
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.057
CY2021Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.042
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.042
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	5087000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	158000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5954000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	154000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3242000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	154000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1418000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	77000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	656000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	528000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	628000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	17513000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	543000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1684000	USD
CY2021Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	34000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	15829000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	509000	USD
CY2021Q1	strl	Consolidated Entities Ownership Percentage ConsolidatedEntitiesOwnershipPercentage	0.50
CY2021Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	618000	USD
CY2020Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	271000	USD
CY2021Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4142000	USD
CY2020Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	913000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4760000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1184000	USD
CY2021Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2020Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	44000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Granted ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	247000	shares
CY2021Q1	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	668000	shares
CY2021Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1835000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2234000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10555000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3115000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28279000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27736000	shares
CY2021Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	484000	shares
CY2020Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	256000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28763000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27992000	shares
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
CY2021Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-876000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.37
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2021Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	7238000	USD
CY2020Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	21026000	USD
CY2021Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	7921000	USD
CY2020Q1	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	12001000	USD
CY2021Q1	strl	Increase Decrease In Receivables From And Equity In Construction Joint Ventures IncreaseDecreaseInReceivablesFromAndEquityInConstructionJointVentures	1513000	USD
CY2020Q1	strl	Increase Decrease In Receivables From And Equity In Construction Joint Ventures IncreaseDecreaseInReceivablesFromAndEquityInConstructionJointVentures	1593000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1242000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	12799000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-14421000	USD
CY2021Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	59000	USD
CY2020Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	888000	USD
CY2021Q1	strl	Increase Decrease In Members Interest Subject To Mandatory Redemption And Undistributed Earnings IncreaseDecreaseInMembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	325000	USD
CY2020Q1	strl	Increase Decrease In Members Interest Subject To Mandatory Redemption And Undistributed Earnings IncreaseDecreaseInMembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings	183000	USD
CY2021Q1	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-11863000	USD
CY2020Q1	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	4676000	USD
CY2021Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2021Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	473000	USD
CY2021Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	22755000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	12103000	USD

Files In Submission

Name	View Source	Status
0000874238-21-000028-index-headers.html	Edgar Link	pending
0000874238-21-000028-index.html	Edgar Link	pending
0000874238-21-000028.txt	Edgar Link	pending
0000874238-21-000028-xbrl.zip	Edgar Link	pending
a2021033110-qexhibit311.htm	Edgar Link	pending
a2021033110-qexhibit312.htm	Edgar Link	pending
a2021033110-qexhibit321.htm	Edgar Link	pending
a2021033110-qexhibit322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
strl-20210331.htm	Edgar Link	pending
strl-20210331.xsd	Edgar Link	pending
strl-20210331_cal.xml	Edgar Link	unprocessable
strl-20210331_def.xml	Edgar Link	unprocessable
strl-20210331_htm.xml	Edgar Link	completed
strl-20210331_lab.xml	Edgar Link	unprocessable
strl-20210331_pre.xml	Edgar Link	unprocessable

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$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl

2021 Q1 Form 10-Q Financial Statement

#000087423821000028 Filed on May 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL STERLING INFRASTRUCTURE, INC. Stock $strl

2021 Q1 Form 10-Q Financial Statement

#000087423821000028 Filed on May 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl