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Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |
Accrued interest | $ 22,400,000 | $ 9,800,000 |
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
Unrealized (losses) gains on investments | $ (88,800,000) | $ 36,300,000 | $ (22,600,000)
Realized loss on write-downs | $ 21,000 | $ (12,600,000) | 18,344,000
Contractual maturities (up to) | 39 years |  |
Weighted average life of available for sale securities portfolio | 7 years 4 months 24 days | 6 years 10 months 24 days |
Amortized cost | $ 0 | $ 35,000 |
Allowance for credit loss |  | 0 |
CECL credit losses | 0 | 0 | 0
Non-Agency RMBS |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Realized loss on write-downs | 21,000 | (11,172,000) | 374,000
Amortized cost | 0 | 35,000 |
Non Agency RMBS Held In Securitization Trust | Non-Agency RMBS |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Realized loss on write-downs | $ (1,200,000) | $ (1,700,000) | $ 0

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- Definition Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-3A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-3B + Details
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