CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 256,637	$ 279,638	$ 723,810	$ 797,155
Material costs	81,462	92,034	228,675	261,810
Personnel costs	89,727	94,594	252,734	272,795
Other operating costs	29,935	32,771	74,098	100,067
General and administrative expenses	31,371	29,834	91,618	87,474
Professional accounting and legal fees	2,264	3,629	7,409	9,576
Depreciation and amortization	8,803	9,373	26,513	26,906
Income from operations	13,075	17,403	42,763	38,527
Interest expense, net	8,013	8,954	24,918	25,973
Non-service defined benefit plan expense	158	173	474	519
Income before income taxes	4,904	8,276	17,371	12,035
(Benefit) provision for income taxes	(1,911)	2,585	(4,750)	3,260
Net income	$ 6,815	$ 5,691	$ 22,121	$ 8,775
Basic and Diluted Per Common Share Data:
Basic income per share	$ 0.18	$ 0.15	$ 0.58	$ 0.24
Weighted average shares used to compute basic earnings per common share	38,133,598	37,349,144	37,878,753	37,218,234
Diluted income per share	$ 0.18	$ 0.15	$ 0.57	$ 0.23
Weighted average shares used to compute diluted earnings per common share	38,637,536	37,986,860	38,491,965	37,921,767