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Fresh Start Accounting - Schedule of Change in Restricted Cash (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Apr. 23, 2021
Dec. 31, 2020
Reorganization Chapter11 [Line Items]      
Change in restricted cash $ 24,266 $ 35,447 $ 24,511
Reorganization Adjustments | Reorganization, Chapter 11, Predecessor, before Adjustment      
Reorganization Chapter11 [Line Items]      
Funding of professional fee escrow account   35,003  
Payment of key employee incentive plan holdback escrow account   (1,697)  
Payment of pre-petition trade claims   (1,133)  
Change in restricted cash   $ 32,173