Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenues	$ 198,498	$ 219,853	$ 581,784	$ 590,435
Cost of revenues	159,133	187,884	474,041	507,078
Selling, general and administrative expenses	26,821	24,207	77,807	72,970
Other operating (income) loss, net	(703)	(345)	(2,148)	(375)
Impairments and other charges	0	29,417	2,816	37,322
Operating income (loss)	13,247	(21,310)	29,268	(26,560)
Foreign currency exchange gain	(445)	(1,424)	(228)	(1,943)
Interest expense, net	2,027	1,875	6,262	4,719
Income (loss) before income taxes	11,665	(21,761)	23,234	(29,336)
Provision for income taxes	3,995	2,834	8,242	490
Net income (loss)	$ 7,670	$ (24,595)	$ 14,992	$ (29,826)
Net income (loss) per common share - basic (in dollars per share)	$ 0.09	$ (0.26)	$ 0.17	$ (0.32)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.09	$ (0.26)	$ 0.17	$ (0.32)