Annual report pursuant to Section 13 and 15(d)

Borrowings (Schedule of Borrowings) (Details)

v3.20.4
Borrowings (Schedule of Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Dec. 20, 2019
Aug. 31, 2018
Jun. 07, 2018
Oct. 03, 2016
Principal components:              
Total principal outstanding $ 3,012,641   $ 3,185,000        
Total carrying value of borrowings 2,969,264   3,186,109        
Deferred financing costs 23,643   22,233        
Secured Debt              
Principal components:              
Unamortized deferred financing costs for Senior Notes (7,019)   (14,359)        
Senior Secured Revolving Credit Facility due 2024 | Secured Debt              
Principal components:              
Total principal outstanding $ 985,000   1,285,000        
9.00% Second Lien Notes              
Principal components:              
Debt instrument, interest rate, stated (as a percent) 9.00% 9.00%          
9.00% Second Lien Notes | Secured Debt              
Principal components:              
Total principal outstanding $ 516,659   0        
Unamortized premium (discount) (41,820)   0        
Unamortized deferred financing costs for Senior Notes $ (3,931)   0        
6.25% Senior Notes due 2023              
Principal components:              
Debt instrument, interest rate, stated (as a percent) 6.25%     6.25%     6.25%
6.25% Senior Notes due 2023 | Unsecured debt              
Principal components:              
Total principal outstanding $ 542,720   650,000        
Unamortized premium (discount) $ 2,917   4,838        
6.125% Senior Notes due 2024              
Principal components:              
Debt instrument, interest rate, stated (as a percent) 6.125%           6.125%
6.125% Senior Notes due 2024 | Unsecured debt              
Principal components:              
Total principal outstanding $ 460,241   600,000        
Unamortized premium (discount) $ 3,236   5,344        
8.25% Senior Notes due 2025              
Principal components:              
Debt instrument, interest rate, stated (as a percent) 8.25%     8.25%      
8.25% Senior Notes due 2025 | Unsecured debt              
Principal components:              
Total principal outstanding $ 187,238   250,000        
Unamortized premium (discount) $ 3,240   5,286        
6.375% Senior Notes due 2026              
Principal components:              
Debt instrument, interest rate, stated (as a percent) 6.375%            
6.375% Senior Notes due 2026 | Unsecured debt              
Principal components:              
Total principal outstanding $ 320,783   $ 400,000        
Debt instrument, interest rate, stated (as a percent)         6.375% 6.375%