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Note 4 - Construction Joint Ventures - Construction Joint Ventures, Partner Share (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Current assets $ 180,967 $ 175,908
Less current liabilities (151,778) (146,592)
Sterling’s receivables from and equity in construction joint ventures 7,890 7,130
Corporate Joint Venture [Member]    
Current assets 32,782 32,592
Less current liabilities (53,883) (57,598)
Net assets (21,101) (25,006)
Backlog 92,724 107,333
Sterling’s noncontrolling interest in backlog 46,504 52,992
Sterling’s receivables from and equity in construction joint ventures $ 7,890 $ 7,130