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Collateralized Debt Obligations - Schedule of Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Collateralized debt obligations | $ 1,870,517 | $ 2,102,717
Debt Instrument, Redemption, Period One |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate increase, non-redemption | 3.00% |
Debt Instrument, Redemption, Period Two |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate increase, non-redemption | 1.00% |
Debt Instrument, Redemption, Period Three | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate increase, non-redemption | 1.00% |
Debt Instrument, Redemption, Period Three | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate increase, non-redemption | 2.00% |
Collateralized debt obligations | Secured debt |  |
Debt Instrument [Line Items] |  |
Outstanding Face Amount | $ 1,944,948 | 2,197,606
Collateralized debt obligations | 1,870,517 | 2,102,717
Collateralized debt obligations | Secured debt | Consolidated SLST |  |
Debt Instrument [Line Items] |  |
Outstanding Face Amount | 652,933 | 699,408
Collateralized debt obligations | $ 593,737 | $ 634,495
Weighted average interest rate (as a percent) | 2.75% | 2.75%
Collateralized debt obligations | Secured debt | Consolidated SLST | Debt Instrument, Redemption, Period One |  |
Debt Instrument [Line Items] |  |
Collateralized debt obligations | $ 399,300 | $ 647,100
Collateralized debt obligations | Secured debt | Consolidated SLST | Debt Instrument, Redemption, Period Two |  |
Debt Instrument [Line Items] |  |
Collateralized debt obligations | 548,600 | 647,100
Collateralized debt obligations | Secured debt | Consolidated SLST | Debt Instrument, Redemption, Period Three |  |
Debt Instrument [Line Items] |  |
Collateralized debt obligations | 523,200 | 603,800
Collateralized debt obligations | Secured debt | Residential loan securitizations |  |
Debt Instrument [Line Items] |  |
Outstanding Face Amount | 1,292,015 | 1,498,198
Collateralized debt obligations | $ 1,276,780 | $ 1,468,222
Weighted average interest rate (as a percent) | 4.00% | 3.54%

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