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Multi-family Loans, at Fair Value - Unpaid Principal Balance (Details) - 90 Days or greater past due - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Fair Value (1) | $ 0 | $ 4,753
Unpaid Principal Balance | $ 3,363 | $ 3,363

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