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Note 5 - Construction Joint Ventures - Construction Joint Ventures, Partner Share (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Total current assets $ 175,908 $ 134,921
Less current liabilities (146,592) (104,311)
Receivables from and equity in construction joint ventures 7,130 12,930
Corporate Joint Venture [Member]    
Total current assets 32,592 17,312
Less current liabilities (57,598) (49,371)
Net assets (25,006) (32,059)
Backlog 107,333 35,113
Sterling’s noncontrolling interest in backlog 52,992 11,748
Receivables from and equity in construction joint ventures $ 7,130 $ 12,930