Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details) - USD ($)
Aug. 03, 2021
Jul. 01, 2021
Jun. 21, 2021
Jun. 30, 2021
May 03, 2021
Dec. 31, 2020
Sep. 30, 2020
Subsequent Event [Line Items]              
Total principal outstanding       $ 2,902,641,000   $ 3,012,641,000  
Subsequent Event              
Subsequent Event [Line Items]              
Value of stock issued, debt exchange $ 223,100,000            
Average share price, period 10 days            
Subsequent Event | Investee              
Subsequent Event [Line Items]              
Related party, ownership percentage (greater than) 5.00%            
Primexx Acquisition | Subsequent Event              
Subsequent Event [Line Items]              
Consideration transferred   $ 440,000,000.0          
Consideration transferred, equity issued   $ 9,190,000          
Deposit payment $ 60,100,000            
Debt Instrument, Redemption, Period Two              
Subsequent Event [Line Items]              
Debt instrument redemption price percent (as a percent)     100.00%        
8.00% Senior Notes              
Subsequent Event [Line Items]              
Debt instrument, interest rate, stated (as a percent)     8.00%        
Number of days to closing date of equity offerings     180 days        
8.00% Senior Notes | Debt Instrument, Redemption, Period One              
Subsequent Event [Line Items]              
Debt instrument redemption price percent (as a percent)     108.00%        
8.00% Senior Notes | Debt Instrument, Redemption, Period One | Maximum              
Subsequent Event [Line Items]              
Percentage of principal amount redeemed     35.00%        
Redemption principal amount percentage (as a percent)     65.00%        
8.00% Senior Notes | Debt Instrument, Redemption, Period Two              
Subsequent Event [Line Items]              
Debt instrument, interest rate, stated (as a percent)     104.00%        
Debt instrument redemption price percent (as a percent)     100.00%        
8.00% Senior Notes | Debt Instrument, Redemption, Period Three              
Subsequent Event [Line Items]              
Debt instrument redemption price percent (as a percent)     101.00%        
6.25% Senior Notes              
Subsequent Event [Line Items]              
Debt instrument, interest rate, stated (as a percent)       6.25%      
Total principal outstanding     $ 542,700,000 $ 542,720,000   542,720,000  
Second Lien Notes              
Subsequent Event [Line Items]              
Debt instrument aggregate principal amount             $ 300,000,000.0
Debt instrument, interest rate, stated (as a percent)       9.00%      
Total principal outstanding       $ 516,659,000   $ 516,659,000  
Second Lien Notes | Subsequent Event              
Subsequent Event [Line Items]              
Notes reduction $ 197,000,000.0            
Unsecured debt              
Subsequent Event [Line Items]              
Debt instrument aggregate principal amount     650,000,000.0   $ 100,000,000.0    
Unsecured debt | 6.25% Senior Notes              
Subsequent Event [Line Items]              
Debt instrument, interest rate, stated (as a percent)       6.25%      
Net proceeds from issuance of senior unsecured notes     $ 638,100,000