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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 | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Note 11 - Variable Interest Entities (Details) - Summary Financial Information of Myers Included in the Consolidated Statements of Operations [Line Items] |  |  |  |
Revenues | $ 189,275 | $ 185,935 | $ 518,618 | $ 430,320
Operating income | (1,573) | 1,697 | 1,404 | (32,199)
Net income attributable to Sterling common stockholders | (3,935) | (189) | (2,529) | (21,792)
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 | 40,159 | 23,240 | 101,953 | 59,377
Operating income | 3,461 | 1,772 | 6,760 | 3,130
Net income attributable to Sterling common stockholders | $ 1,728 | $ 575 | $ 3,376 | $ 1,016

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