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Condensed Consolidated Statement of Changes in Equity (Unaudited) (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2014	$ 188us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 205,697us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (72,098)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ (101)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ 7,462us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember	$ 141,148us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in Shares) at Dec. 31, 2014	18,803us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Net (loss) income			(16,992)strl_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterest1 / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember		292strl_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterest1 / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember	(16,700)strl_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterest1
Other comprehensive income				42us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember		42us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Issuance and amortization of restricted stock	1us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	158us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember				159us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Issuance and amortization of restricted stock (in Shares)	129us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Other		(183)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember				(183)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther
Other (in Shares)	(38)us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance at Mar. 31, 2015	$ 189us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 205,672us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (89,090)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ (59)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ 7,754us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember	$ 124,466us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in Shares) at Mar. 31, 2015	18,894us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember

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- Definition

The net income including the portion attributable to the noncontolling interests including the noncontrolling owners' interests in earnings of subsidiaries and joint ventures.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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