Revenue and Customers - Significant Changes in Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Feb. 05, 2021	Sep. 30, 2021	Sep. 30, 2020
Contract Assets
Contract assets, beginning balance	$ 13,861	$ 0	$ 30,800
Amortization of deferred costs	(1,607)	(1,293)	(22,736)
Additions to deferred costs	432	5,436	7,365
Fresh start accounting revaluation	(12,686)
Total	(13,861)	4,143	(15,371)
Contract assets, ending balance	0	4,143	15,429
Contract Liabilities
Contract liabilities, beginning balance	(59,886)	(8,287)	(65,055)
Additions to deferred costs		0
Amortization of deferred revenue	4,142	5,962	46,523
Additions to deferred revenue	(25,479)	(15,166)	(41,515)
Fresh start accounting revaluation	72,936
Total	51,599	(9,204)	5,008
Contract liabilities, ending balance	$ (8,287)	$ (17,491)	$ (60,047)