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Indebtedness - Debt Outstanding (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Jan. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]      
Senior notes $ 2,600,452   $ 2,950,452
Unamortized premium 125   188
Unamortized debt issuance costs (21,360)   (24,853)
Total debt net of debt issuance costs 2,579,217   2,925,787
Less current maturities of long-term debt (749,483)   (218,017)
Total debt 1,829,734   2,707,770
Notes Payable to Banks      
Debt Instrument [Line Items]      
Bank debt 0   0
4.75% Senior Notes Due 2030      
Debt Instrument [Line Items]      
Unamortized debt issuance costs   $ (7,900)  
4.75% Senior Notes Due 2030 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 500,000   0
4.875% Senior Notes Due 2025 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 750,000   750,000
5.00% Senior Notes Due 2022 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 169,589   169,589
5.00% Senior Notes Due 2023 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 532,335   532,335
5.875% Senior Notes Due 2022 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 48,528   48,528
8.25% Senior Notes Due 2029 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes 600,000   600,000
9.25% Senior Notes Due 2026 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Senior notes $ 0   $ 850,000