Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)

v3.21.1
Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)
Mar. 31, 2021
6.75% Senior Secured Notes [Member] | Debt Issuance Costs [Member]  
Debt Instrument [Line Items]  
Imputed interest rate percentage 7.08%