Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Summary of Financial Instruments at Carrying and Fair Value (Details)

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Fair Value Measurements - Summary of Financial Instruments at Carrying and Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Jun. 21, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 20, 2019
Jun. 07, 2018
Oct. 03, 2016
6.25% Senior Notes due 2023              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 6.25%            
6.125% Senior Notes due 2024              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 6.125%           6.125%
9.00% Second Lien Notes              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 9.00%     9.00%      
8.25% Senior Notes due 2025              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent)         8.25%    
8.00% Senior Notes due 2028              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 8.00%            
Unsecured debt | 6.25% Senior Notes due 2023              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 6.25% 6.25%          
Unsecured debt | 6.125% Senior Notes due 2024              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 6.125%            
Unsecured debt | 8.25% Senior Notes due 2025              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 8.25%            
Unsecured debt | 6.375% Senior Notes due 2026              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 6.375%         6.375%  
Unsecured debt | 8.00% Senior Notes due 2028              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Debt instrument, interest rate, stated (as a percent) 8.00%            
Principal Amount              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Total $ 1,937,921   $ 2,027,641        
Principal Amount | Unsecured debt | 6.25% Senior Notes due 2023              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 0   542,720        
Principal Amount | Unsecured debt | 6.125% Senior Notes due 2024              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 460,241   460,241        
Principal Amount | Unsecured debt | 9.00% Second Lien Notes              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 319,659   516,659        
Principal Amount | Unsecured debt | 8.25% Senior Notes due 2025              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 187,238   187,238        
Principal Amount | Unsecured debt | 6.375% Senior Notes due 2026              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 320,783   320,783        
Principal Amount | Unsecured debt | 8.00% Senior Notes due 2028              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 650,000   0        
Fair Value              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Total 1,956,257   1,336,990        
Fair Value | Unsecured debt | 6.25% Senior Notes due 2023              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 0   344,627        
Fair Value | Unsecured debt | 6.125% Senior Notes due 2024              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 455,639   260,036        
Fair Value | Unsecured debt | 9.00% Second Lien Notes              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 343,633   470,160        
Fair Value | Unsecured debt | 8.25% Senior Notes due 2025              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 184,429   100,172        
Fair Value | Unsecured debt | 6.375% Senior Notes due 2026              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes 309,556   161,995        
Fair Value | Unsecured debt | 8.00% Senior Notes due 2028              
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]              
Senior Notes $ 663,000   $ 0