Mortgage-Backed Securities - Gross Unrealized Losses (Details) $ in Thousands |
Sep. 30, 2026
USD ($)
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Dec. 31, 2025
USD ($)
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|---|---|---|
| Investments [Line Items] | ||
| Allowance for credit loss | $ 0 | $ 0 |
| Agency MBS | ||
| Investments [Line Items] | ||
| Fair value, Less than 12 Months | 4,443 | 730 |
| Gross Unrealized Losses, Less than 12 Month | $ (111) | $ (1) |
| Number of Securities, Less than 12 Months | 4 | 2 |
| Fair value, 12 Months or Longer | $ 618,036 | $ 721,536 |
| Gross Unrealized Losses, 12 Months or Longer | $ (166,604) | $ (129,658) |
| Number of Securities, 12 Months or Longer | 50 | 56 |
| Non-Agency MBS | ||
| Investments [Line Items] | ||
| Fair value, Less than 12 Months | $ 834 | $ 208 |
| Gross Unrealized Losses, Less than 12 Month | $ (5) | $ (22) |
| Number of Securities, Less than 12 Months | 1 | 3 |
| Fair value, 12 Months or Longer | $ 0 | $ 752 |
| Gross Unrealized Losses, 12 Months or Longer | $ 0 | $ (25) |
| Number of Securities, 12 Months or Longer | 0 | 3 |
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- Definition Amount of allowance for credit 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/2003/role/disclosureRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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