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Long-Term Debt - Schedule of Accrued Interest Payable on Long Term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Accrued interest payable $ 9,410 $ 12,402
Facilities    
Debt Instrument [Line Items]    
Accrued interest payable 900 1,799
Convertible notes | 4.75% convertible senior notes    
Debt Instrument [Line Items]    
Accrued interest payable 1,206 3,564
Convertible notes | 5.625% convertible senior notes    
Debt Instrument [Line Items]    
Accrued interest payable 1,784 3,896
Convertible notes | 5.75% exchangeable senior notes    
Debt Instrument [Line Items]    
Accrued interest payable 4,948 2,474
Trust preferred securities and subordinated notes    
Debt Instrument [Line Items]    
Accrued interest payable $ 572 $ 669