Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 183,256	$ 194,144	$ 383,286	$ 370,582
Cost of revenues	150,170	168,206	314,908	319,194
Selling, general and administrative expenses	25,576	24,330	50,986	48,763
Other operating (income) loss, net	(1,184)	(80)	(1,445)	(30)
Impairments and other charges	2,816	7,905	2,816	7,905
Operating income (loss)	5,878	(6,217)	16,021	(5,250)
Foreign currency exchange (gain) loss	(102)	(583)	217	(519)
Interest expense, net	2,146	1,638	4,235	2,844
Income (loss) before income taxes	3,834	(7,272)	11,569	(7,575)
Provision (benefit) for income taxes	2,132	480	4,247	(2,344)
Net income (loss)	$ 1,702	$ (7,752)	$ 7,322	$ (5,231)
Net income (loss) per common share - basic (in dollars per share)	$ 0.02	$ (0.08)	$ 0.08	$ (0.06)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.02	$ (0.08)	$ 0.08	$ (0.06)