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Borrowings - Consolidated Debt and Capital Lease Obligations - Table and Narrative (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Aug. 31, 2017
Debt Instrument [Line Items]      
Finance Lease, Liability, Statement of Financial Position [Extensible List] Borrowings Borrowings  
Finance lease liabilities $ 9,953,000 $ 8,288,000  
Debt and finance lease liabilities, gross 3,219,443,000 3,373,493,000  
Less: debt discount and issuance costs, net of amortization (67,515,000) (91,859,000)  
Borrowings 3,151,928,000 3,281,634,000  
Debt instrument face value 422,500,000 583,500,000  
Credit Facility | Global senior secured revolving credit facility      
Debt Instrument [Line Items]      
Long-term debt 520,505,000 481,007,000  
Credit Facility | Cabot securitisation senior facility      
Debt Instrument [Line Items]      
Long-term debt 482,377,000 478,131,000  
Encore private placement notes | Encore private placement notes      
Debt Instrument [Line Items]      
Long-term debt $ 136,780,000 146,550,000  
Debt instrument face value     $ 325,000,000.0
Stated interest rate (as a percent) 5.625%    
Senior secured notes | Senior secured notes      
Debt Instrument [Line Items]      
Long-term debt $ 1,622,407,000 1,651,619,000  
Convertible notes and exchangeable notes | Convertible notes and exchangeable notes      
Debt Instrument [Line Items]      
Long-term debt 422,500,000 583,500,000  
Other      
Debt Instrument [Line Items]      
Long-term debt $ 24,921,000 $ 24,398,000