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Note 8 - Consolidated Statements of Operations - Myers (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Variable Interest Entity, Primary Beneficiary [Member]    
Revenues $ 26,943 $ 36,268
Operating income 194 582
Net income attributable to Sterling common stockholders 94 290
Revenues 126,567 117,682
Operating income $ (6,466) $ (16,678)