Fresh Start Accounting - Schedule of Cumulative Net Impact of Effects on Accumulated Deficit (Detail) - Reorganization Adjustments $ in Thousands	Apr. 23, 2021 USD ($)
Fresh Start Adjustment [Line Items]
Success fee recognized on the Effective Date	$ (17,120)
Pre-tax gain on settlement of liabilities subject to compromise	1,129,892
Backstop commitment expense to record difference between accrued termination fee and issuance of payment-in-kind Exit Notes upon emergence	(524)
Write-off of Predecessor directors and officers tail insurance policy	(6,932)
Other emergence effects	(137)
Expense related to bonus accrual under BOP services agreement	(831)
Cancellation of Predecessor common stock, additional paid-in capital and treasury stock	1,825,268
Issuance of Emergence Warrants to Predecessor equity holders	(20,574)
Change in deferred tax as a result of step plan adjustments	(3,869)
Change in accumulated deficit	$ 2,905,173