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Senior Notes, Convertible Notes and Trust Preferred Securities - Schedule of Maturities of Long-term Debt (Details) - Senior Notes, Convertible Notes, and Trust Preferred Securities
$ in Thousands
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]  
2021 $ 0
2022 0
2023 188,756
2024 198,932
2025 0
Thereafter 529,120
Unamortized debt discounts (3,491)
Unamortized debt issuance costs $ (6,547)