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Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Accrued interest | $ 13,200,000 |  | $ 13,200,000 |  | $ 9,800,000
Unrealized losses on investment securities available for sale | 14,600,000 | $ 8,500,000 | $ 47,900,000 | $ 7,700,000 |
Realized loss on write-downs |  | (41,000) |  | (41,000) |
Contractual maturities (up to) |  |  | 39 years |  |
Weighted average life of available for sale securities portfolio |  |  | 6 years 6 months |  | 6 years 10 months 24 days
Non Agency RMBS Held In Securitization Trust | Non-Agency RMBS |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Realized loss on write-downs | $ (100,000) | $ 0 | $ (500,000) | $ 0 |

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