CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 262,946	$ 257,966	$ 763,907	$ 755,033
Material costs	84,805	82,345	247,677	240,407
Personnel costs	90,853	90,065	266,515	265,851
Other operating costs	30,999	33,184	92,631	97,734
General and administrative expenses	28,308	25,356	80,467	75,969
Professional accounting and legal fees	3,107	7,844	12,189	29,015
Depreciation and amortization	8,950	9,632	27,552	29,594
Income from operations	15,924	9,540	36,876	16,463
Interest expense, net	8,939	15,097	28,519	43,197
Loss on extinguishment of debt			16,998
Non-service defined benefit plan expense	176	184	528	552
Income (loss) before income taxes	6,809	(5,741)	(9,169)	(27,286)
Provision (benefit) for income taxes	2,440	(1,580)	(3,848)	(7,028)
Net income (loss)	$ 4,369	$ (4,161)	$ (5,321)	$ (20,258)
Per share data:
Basic income (loss) per share	$ 0.12	$ (0.11)	$ (0.14)	$ (0.56)
Weighted average shares outstanding - basic	36,856,881	36,340,089	36,716,568	36,238,816
Diluted income (loss) per share	$ 0.12	$ (0.11)	$ (0.14)	$ (0.56)
Weighted average shares outstanding - diluted	37,556,594	36,340,089	36,716,568	36,238,816