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Construction Joint Ventures - Balance Sheet Information (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Current assets | $ 313,376 | $ 278,526
Less current liabilities | (194,669) | (182,292)
Sterling’s receivables from and equity in noncontrolling construction joint ventures | 11,521 | 11,380
Joint Ventures |  |
Schedule of Equity Method Investments [Line Items] |  |
Current assets | 64,957 | 64,574
Less current liabilities | (72,617) | (78,349)
Net liabilities | (7,660) | (13,775)
Sterling’s receivables from and equity in noncontrolling construction joint ventures | $ 11,521 | $ 11,380

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