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Indebtedness - Debt Outstanding (Parenthetical) (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Mar. 31, 2020
Jan. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]        
Current maturities of long-term debt [1] $ 59,334     $ 0
4.875% Senior Notes Due 2025        
Debt Instrument [Line Items]        
Interest rate on notes 4.875%     4.875%
5.00% Senior Notes Due 2023        
Debt Instrument [Line Items]        
Interest rate on notes 5.00% 5.00%   5.00%
5.00% Senior Notes Due 2022        
Debt Instrument [Line Items]        
Interest rate on notes 5.00% 5.00%   5.00%
5.75% Senior Notes Due 2021        
Debt Instrument [Line Items]        
Interest rate on notes 5.75%   5.75% 5.75%
5.875% Senior Notes Due 2022        
Debt Instrument [Line Items]        
Interest rate on notes 5.875% 5.875% 5.875% 5.875%
9.25% Senior Notes Due 2026        
Debt Instrument [Line Items]        
Interest rate on notes 9.25%     9.25%
5.00% Senior Subordinated Notes Due 2023        
Debt Instrument [Line Items]        
Interest rate on notes 5.00%     5.00%
5.00% Senior Subordinated Notes Due 2022        
Debt Instrument [Line Items]        
Interest rate on notes 5.00%     5.00%
5.75% Senior Subordinated Notes Due 2021        
Debt Instrument [Line Items]        
Interest rate on notes 5.75%     5.75%
5.75% senior notes and subordinated senior notes due 2021        
Debt Instrument [Line Items]        
Current maturities of long-term debt $ 59,400      
Notes Payable to Banks | 2.3% Bank Debt        
Debt Instrument [Line Items]        
Bank debt percentage 2.30%     2.30%
[1] As of June 30, 2020, current maturities includes $59.4 million principal amount of our 5.75% senior and senior subordinated notes due 2021.