Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Debt Securities, Available-for-sale [Line Items] | |||||
| Accrued interest | $ 37,000,000.0 | $ 37,000,000.0 | $ 34,000,000.0 | ||
| Unrealized (losses) gains on investment securities available for sale | (392,900,000) | $ 47,800,000 | (465,300,000) | $ 148,800,000 | |
| Proceeds from sales of investment securities | 0 | $ 0 | $ 293,348,000 | 663,336,000 | |
| Contractual maturities (up to) | 44 years | ||||
| Weighted average life of available for sale securities portfolio | 7 years 10 months 24 days | 6 years 7 months 6 days | |||
| Non-Agency RMBS | |||||
| Debt Securities, Available-for-sale [Line Items] | |||||
| Proceeds from sales of investment securities | 4,573,000 | ||||
| Non-Agency RMBS | Non Agency RMBS Held In Securitization Trust | |||||
| Debt Securities, Available-for-sale [Line Items] | |||||
| Debt securities, available for sale, write-down | $ 1,100,000 | $ 5,600,000 | $ 2,500,000 | ||
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- Definition Represents the weighted average life of the available for sale securities portfolio. No definition available.
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- Definition Contractual maturities of investments. No definition available.
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- Definition Debt Securities, Available For Sale, Write-Down No definition available.
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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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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