Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenues	$ 165,494	$ 363,790	$ 565,540	$ 890,945
Cost of revenues	143,566	300,767	497,657	758,301
Gross profit (exclusive of depreciation and amortization included in selling, general and administrative expense shown below)	21,928	63,023	67,883	132,644
Selling, general and administrative expenses	22,610	27,924	72,784	88,386
Restructuring expense	501	4,653	9,510	7,379
Impairment expense		1,754	2,775	1,754
Other operating income		(1,666)		(3,235)
Operating income (loss)	(1,183)	30,358	(17,186)	38,360
Other income		(25)		(71)
Interest expense, net	11,053	11,188	32,925	34,342
Income (Loss) before income taxes	(12,236)	19,195	(50,111)	4,089
Income tax expense	87	2,092	484	2,157
Net income (loss)	(12,323)	17,103	(50,595)	1,932
Other comprehensive income:
Foreign currency translation adjustments	26	13	26	13
Comprehensive income (loss)	$ (12,297)	$ 17,116	$ (50,569)	$ 1,945