CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Net revenue	$ 233,995	$ 233,681
Material costs	76,356	74,405
Personnel expenses	86,108	87,955
Other operating costs	31,096	32,689
General and administrative expenses	25,636	25,386
Professional accounting and legal fees	4,846	12,650
Depreciation and amortization	9,330	10,137
Income (loss) from operations	623	(9,541)
Interest expense, net	12,263	14,009
Loss on extinguishment of debt	16,998
Non-service defined benefit plan expense	176	184
Loss before income taxes	(28,814)	(23,734)
Benefit for income taxes	(6,196)	(6,000)
Net loss	(22,618)	(17,734)
Other comprehensive loss:
Unrealized loss on cash flow hedges (net of tax benefit of $702 for the three months ended March 31, 2018)	(2,290)
Unrealized loss on defined benefit plan (net of tax benefit of $105 and $0 for the three months ended March 31, 2018 and 2017, respectively)	(292)	(17)
Total other comprehensive loss	(2,582)	(17)
Comprehensive loss	$ (25,200)	$ (17,751)
Basic and Diluted Per Common Share Data:
Basic and diluted loss per common share	$ (0.62)	$ (0.49)
Weighted average shares used to compute basic and diluted earnings per common share	36,498,482	36,084,630