Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Credit Facility) (Details)

v3.20.2
Borrowings (Credit Facility) (Details) - USD ($)
May 07, 2020
Dec. 31, 2021
Jun. 30, 2020
Dec. 31, 2019
Oct. 03, 2016
Line of Credit Facility [Line Items]          
Total principal outstanding     $ 3,350,000,000 $ 3,185,000,000  
New Credit Facility          
Line of Credit Facility [Line Items]          
Credit facility borrowing base $ 1,700,000,000        
Increase limit $ 1,700,000,000        
Total principal outstanding     $ 1,450,000,000    
Interest rate at period end (as a percent)     3.01%    
Letters of credit outstanding     $ 19,700,000    
New Credit Facility | LIBOR          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 1.00%        
New Credit Facility | Federal Funds Rate          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 0.50%        
New Credit Facility | Maximum          
Line of Credit Facility [Line Items]          
Leverage ratio 300.00%        
Unused capacity, commitment fee (as a percent) 0.50%        
New Credit Facility | Maximum | Base Rate          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 2.00%        
New Credit Facility | Maximum | Eurodollar          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 3.00%        
New Credit Facility | Minimum          
Line of Credit Facility [Line Items]          
Leverage ratio 100.00%        
Unused capacity, commitment fee (as a percent) 0.375%        
New Credit Facility | Minimum | Base Rate          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 1.00%        
New Credit Facility | Minimum | Eurodollar          
Line of Credit Facility [Line Items]          
Debt instrument interest rate (as a percent) 2.00%        
6.25% Senior Notes due 2023          
Line of Credit Facility [Line Items]          
Total principal outstanding     $ 650,000,000 650,000,000  
Debt instrument, interest rate, stated (as a percent)     6.25%   6.25%
6.125% Senior Notes due 2024          
Line of Credit Facility [Line Items]          
Total principal outstanding     $ 600,000,000 $ 600,000,000  
Debt instrument, interest rate, stated (as a percent)     6.125%   6.125%
Second Lien Notes          
Line of Credit Facility [Line Items]          
Debt instrument aggregate principal amount $ 400,000,000        
First Amendment to the Credit Agreement          
Line of Credit Facility [Line Items]          
Amount of cash held to lesser $ 125,000,000.0        
Percent of borrowing base 7.50%        
Period required for entering into and maintain minimum hedges 12 months        
First Amendment to the Credit Agreement | LIBOR          
Line of Credit Facility [Line Items]          
Increase in applicable margins 0.75%        
First Amendment to the Credit Agreement | Base Rate          
Line of Credit Facility [Line Items]          
Increase in applicable margins 0.75%        
First Amendment to the Credit Agreement | Maximum          
Line of Credit Facility [Line Items]          
Total funded debt to EBITDAX ratio 400.00%        
Leverage ratio 100.00%        
Leverage ratio for certain investments and cash distributions 250.00%        
First Amendment to the Credit Agreement | Maximum | Forecast          
Line of Credit Facility [Line Items]          
Total funded debt to EBITDAX ratio   300.00%      
First Amendment to the Credit Agreement | Minimum          
Line of Credit Facility [Line Items]          
Net notional volumes, percent of reasonably anticipated production 40.00%        
Mortgage and title coverage as percent of total value of proved oil and gas properties 90.00%