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Indebtedness - Debt Outstanding (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Senior notes $ 2,950,452 $ 2,376,438
Senior subordinated notes 0 37,338
Total debt 2,950,452 3,115,776
Unamortized premium 188 457
Unamortized debt issuance costs (24,853) (30,625)
Total debt (net of debt issuance costs) 2,925,787 3,085,608
Less current maturities of long-term debt (218,017) (45,356)
Total debt 2,707,770 3,040,252
Notes Payable to Banks    
Debt Instrument [Line Items]    
Bank debt 0 702,000
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    
Debt Instrument [Line Items]    
Senior subordinated notes 0 9,730
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    
Debt Instrument [Line Items]    
Senior subordinated notes 0  
5.00% Senior Notes Due 2023 | Notes Payable to Banks    
Debt Instrument [Line Items]    
Senior notes 532,335 532,335
5.75% Senior Notes Due 2021    
Debt Instrument [Line Items]    
Senior subordinated notes 0  
5.75% Senior Notes Due 2021 | Notes Payable to Banks    
Debt Instrument [Line Items]    
Senior notes 0 25,496
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 0
9.25% Senior Notes Due 2026 | Notes Payable to Banks    
Debt Instrument [Line Items]    
Senior notes 850,000 850,000
Other Senior Notes Due 2022 | Notes Payable to Banks    
Debt Instrument [Line Items]    
Senior notes $ 0 490
5.00% Senior Subordinated Notes Due 2023    
Debt Instrument [Line Items]    
Senior subordinated notes   7,712
5.75% Senior Subordinated Notes Due 2021    
Debt Instrument [Line Items]    
Senior subordinated notes   $ 19,896