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Long-term Debt - Principal Amount of Debt by Year of Maturity (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Jun. 28, 2021
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]        
2022 $ 0      
2023 0      
2024 235,000      
2025 244,400      
2026 0      
Thereafter 2,215,000      
Long-term debt, gross 2,694,400      
7.5% Senior Notes due 2025        
Debt Instrument [Line Items]        
2022 0      
2023 0      
2024 0      
2025 244,400      
2026 0      
Thereafter 0      
Long-term debt, gross 244,400     $ 619,400
Interest rate on debt instrument     7.50%  
9.75% Senior Notes Due 2026        
Debt Instrument [Line Items]        
Long-term debt, gross 0     1,650,000
Interest rate on debt instrument     9.75%  
6.75% Senior Notes Due 2029        
Debt Instrument [Line Items]        
2022 0      
2023 0      
2024 0      
2025 0      
2026 0      
Thereafter 1,250,000      
Long-term debt, gross 1,250,000     0
Interest rate on debt instrument     6.75%  
5.875% Senior Notes Due 2030        
Debt Instrument [Line Items]        
2022 0      
2023 0      
2024 0      
2025 0      
2026 0      
Thereafter 965,000      
Long-term debt, gross 965,000     0
Interest rate on debt instrument   5.875%    
Bank credit facility        
Debt Instrument [Line Items]        
2022 0      
2023 0      
2024 235,000      
2025 0      
2026 0      
Thereafter 0      
Long-term debt, gross $ 235,000     $ 500,000