Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Document Period End Date	Mar. 31, 2022
Revenue	$ 446,159	$ 437,553
Cost of services and products	400,679	380,896
Gross margin	45,480	56,657
Selling, general and administrative expense	46,519	42,874
Income (loss) from operations	(1,039)	13,783
Interest income	796	519
Interest expense, net of amounts capitalized	(9,443)	(10,407)
Equity in income (losses) of unconsolidated affiliates	294	534
Other income (expense), net	444	(1,453)
Income (loss) before income taxes	(8,948)	2,976
Provision (benefit) for income taxes	10,262	12,341
Net Income (Loss)	$ (19,210)	$ (9,365)
Weighted-average shares outstanding
Basic (in shares)	99,963	99,461
Diluted (in shares)	99,963	99,461
Earnings (loss) per share
Basic (in dollars per share)	$ (0.19)	$ (0.09)
Diluted (in dollars per share)	$ (0.19)	$ (0.09)