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Note 18 - Quarterly Financial Information (amounts in thousands, except per share data) (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Quarterly Financial Information [Table Text Block]

		2012 Quarters Ended (unaudited)
		March 31				June 30				September 30				December 31				Total
Revenues		$	98,425			$	168,709			$	205,284			$	158,089			$	630,507
Gross profit			1,873				15,159				14,170				16,270				47,472
Income (loss) before income taxes and earnings attributable to noncontrolling interests			(3,781	)			8,652				4,915				7,347				17,133
Net income (loss) attributable to Sterling common stockholders			(7,500	)			3,287				990				2,926				(297	)
Net income (loss) per share attributable to Sterling common stockholders:
Basic		$	(0.44	)		$	0.15			$	0.01			$	0.01			$	(0.26	)
Diluted			(0.44	)			0.15				0.01				0.01				(0.26	)

		2011 Quarters Ended (unaudited)
		March 31				June 30				September 30				December 31				Total
Revenues		$	99,242			$	128,498			$	159,427			$	113,989			$	501,156
Gross profit			7,599				13,582				14,756				3,900				39,837
Income (loss) before income taxes and earnings attributable to noncontrolling interests			1,648				7,437				7,925				(68,726	)			(51,716	)
Net income (loss) attributable to Sterling common stockholders			44				4,211				3,461				(43,616	)			(35,900	)
Net income (loss) per share attributable to Sterling common stockholders:
Basic		$	0.00			$	0.26			$	0.21			$	(2.72	)		$	(2.24	)
Diluted			0.00				0.25				0.21				(2.72	)			(2.24	)