Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (34,354)	$ (361,681)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	26,952	74,626
Loss on impairment of assets	0	197,027
Gain on disposition of assets	(4,044)	(5,401)
Deferred tax provision	(5,217)	(5,565)
Stock-based compensation expense	4,531
Contract liabilities, net	(13,411)	6,974
Contract assets, net	(334)	(326)
Deferred contract costs, net	1,850	(9,176)
Collateral deposits	(1,482)
Other assets, noncurrent	(302)	1,279
Other liabilities, noncurrent	2,992	(110)
Other	418	282
Changes in operating assets and liabilities:
Accounts receivable	26,909	(14,993)
Prepaid expenses and other current assets	1,378	(1,340)
Accounts payable and accrued liabilities	11,129	68,274
Taxes payable	(7,957)	922
Net cash provided by (used in) operating activities	9,058	(49,208)
Investing activities:
Capital expenditures	(20,046)	(40,617)
Proceeds from disposition of assets, net of disposal costs	5,045	7,400
Net cash used in investing activities	(15,001)	(33,217)
Financing activities:
Borrowings under revolving credit facility	20,000
Principal payments of finance lease liabilities	(3,813)
Debt issuance costs and arrangement fees		(2,290)
Net cash provided by financing activities	16,187	(2,290)
Net change in cash, cash equivalents and restricted cash	10,244	(84,715)
Cash, cash equivalents and restricted cash, beginning of period	62,729	430,380
Cash, cash equivalents and restricted cash, end of period	$ 72,973	$ 345,665