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Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net (loss) income attributable to Sterling common stockholders	$ (16,992)us-gaap_NetIncomeLoss	$ 205us-gaap_NetIncomeLoss
Net income attributable to noncontrolling interests included in equity	292strl_NetIncomeAttributableToNoncontrollingInterestIncludedInEquity	275strl_NetIncomeAttributableToNoncontrollingInterestIncludedInEquity
Add / (deduct) other comprehensive income, net of tax:
Realized loss (gain) from settlement of derivatives	50us-gaap_GainLossOnSaleOfDerivatives	(14)us-gaap_GainLossOnSaleOfDerivatives
Change in the effective portion of unrealized loss in fair market value of derivatives	(8)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	(76)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Comprehensive (loss) income	$ (16,658)us-gaap_ComprehensiveIncomeNetOfTax	$ 390us-gaap_ComprehensiveIncomeNetOfTax

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Amount of net income or loss for the period allocated to the noncontrolling interest included in equity in order to derive to the portion attributable to the parent.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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