Revenue from Contracts with Customers - Summary of Significant Changes in Contract Assets and Contract Liabilities Balances (Detail) - USD ($) $ in Thousands	4 Months Ended	5 Months Ended
	Apr. 23, 2021	Sep. 30, 2021
Revenue From Contract With Customer [Abstract]
Contract assets at January 1, 2021	$ 2,870
Contract liabilities at January 1, 2021	(56,927)
Net balance beginning	(54,057)	$ 418
Decrease due to amortization of revenue included in the beginning contract liability balance	15,341
Increase due to cash received, excluding amounts recognized as revenue during the period	(22,553)	(51,275)
Increase due to revenue recognized during the period but contingent on future performance	1,442	974
Decrease due to transfer to receivables during the period	(700)
Write-off of deferred revenue due to application of fresh start accounting	60,945
Net balance ending	$ 418	(49,883)
Contract assets at September 30, 2021		1,392
Contract liabilities at September 30, 2021		$ (51,275)