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Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items] |  |  |
Accrued interest | $ 21,800,000 |  | $ 22,400,000
Unrealized gains (losses) on investment securities available for sale | 86,500,000 | $ (33,200,000) |
Sales proceeds | 663,336,000 | 0 |
Realized loss on write-downs | $ (26,818,000) |  |
Contractual maturities (up to) | 39 years |  |
Weighted average life of available for sale securities portfolio | 6 years 1 month 6 days |  | 7 years 4 months 24 days
Non-Agency RMBS |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Sales proceeds | $ 4,573,000 |  |
Realized loss on write-downs | $ 52,000 | $ (400,000) |

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