Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues	$ 94,347	$ 128,403
Depreciation and amortization	10,797	14,765
Loss (gain) on disposal of assets	(2,544)	2,619
Nonoperating Income (Expense) [Abstract]
Loss on derivative	(4,798)	(3,552)
Loss from continuing operations before income taxes	(33,762)	(140,219)
Income tax benefit	(287)	(3,790)
Loss from continuing operations	(33,475)	(136,429)
Loss from discontinued operations	(3,797)	(8,452)
Net loss	$ (37,272)	$ (144,881)
Earnings Per Share [Abstract]
Loss from continuing operations per share, basic and diluted (in dollars per share)	$ (1.35)	$ (5.48)
Loss from discontinued operations per share, basic and diluted (in dollars per share)	(0.15)	(0.34)
Net loss per share, basic and diluted (in dollars per share)	$ (1.50)	$ (5.82)
Continuing Operations
Revenues	$ 94,347	$ 128,403
Costs of services, excluding depreciation and amortization	77,171	102,175
Selling, general and administrative	18,054	26,232
Depreciation and amortization	10,797	14,765
Impairments and other charges	7,258	99,694
Acquisition related costs	0	11,684
Loss (gain) on disposal of assets	(1,993)	(37)
Total operating expenses	111,287	254,513
Operating loss	(16,940)	(126,110)
Nonoperating Income (Expense) [Abstract]
Interest expense, net	(12,024)	(10,557)
Loss on derivative	$ (4,798)	$ (3,552)