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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

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