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Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information


		First Quarter				Second Quarter				Third Quarter				Fourth Quarter
Year ended December 31, 2014
Revenues		$	135,140			$	151,069			$	174,959			$	175,016
Cost of revenues			125,834				121,217				217,741				140,975
Net (loss) income			(3,583	)			7,283				(37,818	)			7,034
Basic (loss) earnings per share			(0.50	)			1.02				(5.27	)			0.99
Diluted (loss) earnings per share			(0.50	)			0.98				(5.27	)			0.97
Common stock market prices:
High			102.20				63.19				63.45				45.38
Low			57.82				41.96				39.47				18.25
Year ended December 31, 2013
Revenues		$	111,551			$	128,798			$	147,971			$	144,524
Cost of revenues			103,240				105,072				117,785				120,223
Net (loss) income			(2,549	)			5,886				8,994				5,561
Basic (loss) earnings per share			(0.36	)			0.83				1.26				0.78
Diluted (loss) earnings per share			(0.36	)			0.80				1.21				0.74
Common stock market prices:
High			53.27				62.82				73.49				98.00
Low			38.15				48.50				48.08				66.33