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Multi-family Loans, at Fair Value - Preferred Equity and Mezzanine Loan Investments (Details) - VIE, Not Primary Beneficiary - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Investment amount | $ 96,314 | $ 95,434
Unrealized (losses) gains, net | (4,409) | 358
Total, at Fair Value | $ 91,905 | $ 95,792

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