Consolidated Statements of Cash Flows - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 23, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net loss	$ (1,961,989)	$ (177,344)		$ (1,254,904)	$ (357,214)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	92,758	68,504		320,085	355,596
Loss on impairment of assets	197,027	132,449		842,016
Reorganization items, net	1,587,392			22,106
(Gain) loss on disposition of assets	(5,486)	(1,024)		(7,375)	1,072
Deferred tax provision	(35,894)	(3,482)		(19,228)	(56,908)
Stock-based compensation expense		10,766		5,637	6,208
Contract liabilities, net	10,617	48,293		8,823	27,578
Contract assets, net	(742)	(1,418)		3,444	2,625
Deferred contract costs, net	(12,034)	(13,081)		1,960	59,141
Long-term employee remuneration programs	475	119		(4,256)	3,169
Collateral deposits		6,030		(18,262)
Other assets, noncurrent	2,685	361		(7,950)	52
Other liabilities, noncurrent	(371)	(2,092)		(2,279)	6,514
Other	2,683	1,579		3,321	2,380
Changes in operating assets and liabilities:
Accounts receivable	2,108	(16,984)		114,329	(37,832)
Prepaid expenses and other current assets	(2,791)	305		6,334	(1,170)
Accounts payable and accrued liabilities	29,302	(40,133)		(14,143)	3,897
Taxes payable	(5,804)	6,056		8,721	(6,019)
Net cash provided by (used in) operating activities	(100,064)	18,904		8,379	9,089
Investing activities:
Capital expenditures	(49,119)	(42,812)		(189,528)	(326,090)
Proceeds from disposition of assets, net of disposal costs	7,484	1,053		13,333	16,217
Proceeds from sale of foreign bonds				5,915
Proceeds from sale and maturities of marketable securities					2,300,000
Purchase of marketable securities					(1,996,996)
Net cash used in investing activities	(41,635)	(41,759)		(170,280)	(6,869)
Financing activities:
(Repayments of) borrowings under Predecessor credit facility	(442,034)			436,000
Borrowings on exit facilities	200,000	50,000
Repayments of exit facilities		(70,000)
Issuance of first lien notes	75,000
Debt issuance costs and arrangement fees	(6,218)				(12)
Principal payments of finance lease liabilities		(9,845)
Net cash (used in) provided by financing activities	(173,252)	(29,845)		436,000	(12)
Net change in cash, cash equivalents and restricted cash	(314,951)	(52,700)		274,099	2,208
Cash, cash equivalents and restricted cash, beginning of period	430,380	115,429	$ 430,380	156,281	154,073
Cash, cash equivalents and restricted cash, end of period	$ 115,429	$ 62,729	$ 62,729	$ 430,380	$ 156,281