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Construction Joint Ventures - Construction Joint Ventures - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Current assets	$ 279,793	$ 175,908
Less current liabilities	(194,953)	(146,592)
Sterling’s receivables from and equity in construction joint ventures	9,069	7,130
Joint Ventures
Schedule of Equity Method Investments [Line Items]
Current assets	42,129	32,592
Less current liabilities	(61,079)	(57,598)
Net liabilities	(18,950)	(25,006)
Backlog	51,110	107,333
Sterling’s noncontrolling interest in backlog	26,659	52,992
Sterling’s receivables from and equity in construction joint ventures	$ 9,069	$ 7,130

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Amounts due from minority-owned entities in which the reporting entity shares joint control with another party or group, due within 1 year (or 1 business cycle). Also, includes the entity's equity in minority-owned joint ventures.

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Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

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