Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue		$ 196,227	$ 427,733	$ 823,852	$ 849,387
Operating costs and expenses:
Cost of services	[1]	178,771	324,503	690,997	662,149
Depreciation and amortization		75,260	69,886	161,081	141,362
Selling, general and administrative expenses		38,024	26,463	94,908	54,399
Merger and integration		14,028	6,108	26,210	6,108
(Gain) loss on disposal of assets		(953)	(330)	(8,915)	151
Impairment expense		0	0	34,327	0
Total operating costs and expenses		305,130	426,630	998,608	864,169
Operating loss		(108,903)	1,103	(174,756)	(14,782)
Other income (expense):
Other income, net		2,259	(43)	2,675	405
Interest expense, net		(5,353)	(5,477)	(11,419)	(10,872)
Total other income (expense)		(3,094)	(5,520)	(8,744)	(10,467)
Loss before income taxes		(111,997)	(4,417)	(183,500)	(25,249)
Income tax expense		(491)	(564)	(744)	(1,538)
Net loss		(112,488)	(4,981)	(184,244)	(26,787)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments		(354)	0	753	(29)
Hedging activities		(2,654)	(3,682)	(5,615)	(6,544)
Total comprehensive loss		$ (115,496)	$ (8,663)	$ (189,106)	$ (33,360)
Net loss per share:
Basic net loss per share (in dollars per share)		$ (0.53)	$ (0.05)	$ (0.86)	$ (0.26)
Diluted net loss per share (in dollars per share)		$ (0.53)	$ (0.05)	$ (0.86)	$ (0.26)
Weighted-average shares outstanding: basic (in shares)		213,760	104,837	213,301	104,631
Weighted-average shares outstanding: diluted (in shares)		213,760	104,837	213,301	104,631

[1] Cost of services during the three and six months ended June 30, 2020 exclude depreciation of $70.7 million and $152.0 million, respectively. Cost of services during the three and six months ended June 30, 2019 exclude depreciation of $66.3 million and $133.9 million, respectively.