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Note 11 - Variable Interest Entities (Details) - Summary financial information of Myers included in the consolidated statements of operations: (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Note 11 - Variable Interest Entities (Details) - Summary financial information of Myers included in the consolidated statements of operations: [Line Items]        
Revenues $ 133,350 $ 168,709 $ 244,385 $ 267,134
Operating income (26,115) 8,240 (34,086) 3,677
Net income attributable to Sterling common stockholders (17,025) 3,287 (21,602) (4,215)
Variable Interest Entity, Primary Beneficiary [Member]
        
Note 11 - Variable Interest Entities (Details) - Summary financial information of Myers included in the consolidated statements of operations: [Line Items]        
Revenues 25,348 19,056 36,137 23,570
Operating income 985 633 1,358 602
Net income attributable to Sterling common stockholders $ 320 $ 204 $ 441 $ 192