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Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Variable Interest Entity [Line Items] |  |  |
Loss on extinguishment of debt | $ 796 | $ (2,214) | $ 1,583
VIE, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Loss on extinguishment of debt |  |  | 1,600
VIE, Primary Beneficiary | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Principal balance |  |  | 14,700
VIE, Primary Beneficiary | Residential loans |  |  |
Variable Interest Entity [Line Items] |  |  |
Principal balance |  |  | $ 203,500
Consolidated SLST | VIE, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Investment in Consolidated SLST limited to securities owned, net carrying value |  | $ 191,500 |

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