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Borrowings - Schedule of Senior Notes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Mar. 04, 2021
Debt Instrument [Line Items]      
Senior notes $ 542,927 $ 311,898  
Senior Notes      
Debt Instrument [Line Items]      
Senior notes 599,500 313,052  
Discount (42,732) 0  
Unamortized debt issuance costs (13,841) (968)  
Fair value adjustments 0 (186)  
Long-term Debt 542,927 311,898  
7.875% Senior Notes, Due 2026 | Secured Debt      
Debt Instrument [Line Items]      
Senior notes $ 400,000 0 $ 400,000
Interest rate (as a percent) 7.875%    
7.875% Senior Notes, Due 2026 | Senior Notes      
Debt Instrument [Line Items]      
Discount $ (2,025) 0 (2,100)
Unamortized debt issuance costs (6,598)    
12% Paid in Cash or 13.25% Paid in Kind Senior Notes, Due 2027      
Debt Instrument [Line Items]      
Discount $ (24,500)    
Interest rate (as a percent) 12.00%    
12% Paid in Cash or 13.25% Paid in Kind Senior Notes, Due 2027 | Secured Debt      
Debt Instrument [Line Items]      
Senior notes $ 199,500 0 $ 199,500
12% Paid in Cash or 13.25% Paid in Kind Senior Notes, Due 2027 | Senior Notes      
Debt Instrument [Line Items]      
Discount (40,707) 0  
Unamortized debt issuance costs $ (7,243) 0  
12% Paid in Cash or 13.25% Paid in Kind Senior Notes, Due 2027 | Payment in Kind (PIK) Note      
Debt Instrument [Line Items]      
Interest rate (as a percent) 13.25%    
6.375% Senior Notes, Due 2021 | Senior Unsecured Notes      
Debt Instrument [Line Items]      
Senior notes $ 0 21,543  
Interest rate (as a percent) 6.375%    
8.375% Senior Secured Notes Due In 2022 | Secured Debt      
Debt Instrument [Line Items]      
Senior notes $ 0 291,509  
Interest rate (as a percent) 8.375%    
8.375% Senior Secured Notes Due In 2022 | Senior Notes      
Debt Instrument [Line Items]      
Unamortized debt issuance costs   $ (968)