Prepetition Revolving Credit Facility, Senior Notes and Exit Debt - Summary of Carrying Value of Long-term Debt, Net of Unamortized Discount, Premium and Debt Issuance Costs (Detail) $ in Thousands	Jun. 30, 2021 USD ($)
Debt Instrument [Line Items]
Total Exit Debt, net	$ 316,051
Exit Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Exit Debt, net	133,478
Exit Term Loans [Member]
Debt Instrument [Line Items]
Total Exit Debt, net	98,958
Exit Notes [Member]
Debt Instrument [Line Items]
Total Exit Debt, net	$ 83,615