Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Document Period End Date	Mar. 31, 2020
Revenue	$ 536,668	$ 493,886
Cost of services and products	489,916	466,299
Gross margin	46,752	27,587
Selling, general and administrative expense	55,741	49,301
Impairment of Intangible Assets, Finite-lived	68,763	0
Goodwill, Impairment Loss	303,005	0
Income (loss) from operations	(380,757)	(21,714)
Interest income	1,277	2,604
Interest expense, net of amounts capitalized	(12,462)	(9,424)
Equity in income (losses) of unconsolidated affiliates	1,197	(164)
Other income (expense), net	(7,128)	719
Income (loss) before income taxes	(397,873)	(27,979)
Provision (benefit) for income taxes	(30,275)	(3,152)
Net Income (Loss)	$ (367,598)	$ (24,827)
Weighted-average shares outstanding
Basic (in shares)	99,055	98,714
Diluted (in shares)	99,055	98,714
Earnings (loss) per share
Basic (in dollars per share)	$ (3.71)	$ (0.25)
Diluted (in dollars per share)	$ (3.71)	$ (0.25)