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Securities, at Fair Value - Impact of AFS Securities on AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
AOCI from AFS Securities: |  |  |  |
Unrealized gain on AFS securities at beginning of period | $ 20,225 | $ 41,856 | $ 21,341 | $ 46,833
Unrealized (losses) on securities available-for-sale | (6,805) | (4,937) | (7,921) | (9,914)
Change in AOCI from AFS securities | (6,805) | (4,937) | (7,921) | (9,914)
Balance at end of period | 13,420 | 36,919 | 13,420 | 36,919
Agency MBS |  |  |  |
AOCI from AFS Securities: |  |  |  |
Unrealized (losses) on securities available-for-sale | $ (6,805) | $ (4,937) | $ (7,921) | $ (9,914)

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