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Note 6 - Variable Interest Entities - Consolidated Statements of Operations - Myers (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues	$ 168,345	$ 205,629	$ 189,582	$ 126,567	$ 152,488	$ 176,000	$ 177,425	$ 117,682	$ 690,123	$ 623,595	$ 672,230
Operating income									(4,729)	(14,387)	(4,224)
Net loss attributable to Sterling common stockholders	$ (6,348)	$ 2,415	$ 2,023	$ (7,328)	$ (19,898)	$ 256	$ (2,542)	$ (16,992)	(9,238)	(39,176)	(9,781)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues									156,202	175,691	144,837
Operating income									6,005	7,371	9,319
Net loss attributable to Sterling common stockholders									$ 2,993	$ 3,681	$ 4,657

X

- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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