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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