CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Revenues	$ 249,697	$ 236,159
Total cost of sales (excluding depreciation and amortization)	113,642	118,637
Selling, general and administrative	30,626	28,989
Depreciation and amortization	49,822	44,106
Long-lived asset impairment	6,195	3,092
Goodwill impairment	99,830
Restatement and other charges		421
Restructuring costs	1,728
Interest expense	29,665	23,617
Transaction-related costs		180
(Gain) loss on sale of assets, net	(4,116)	16
Other income, net	(555)	(221)
Income (loss) before income taxes	(77,140)	17,322
Benefit from income taxes	(15,953)	(2,407)
Income (loss) from continuing operations	(61,187)	19,729
Loss from discontinued operations, net of tax		(273)
Net income (loss)	$ (61,187)	$ 19,456
Basic and diluted net income (loss) per common share (in dollars per share)	$ (0.41)	$ 0.15
Weighted average common shares outstanding:
Basic (in shares)	150,550	128,209
Diluted (in shares)	150,550	128,255
Contract Operations | Contract operations
Revenue:
Revenues	$ 206,974	$ 182,507
Total cost of sales (excluding depreciation and amortization)	78,651	74,735
Aftermarket Services | Aftermarket services
Revenue:
Revenues	42,723	53,652
Total cost of sales (excluding depreciation and amortization)	$ 34,991	$ 43,902