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Real Estate Securities - Available for Sale Securities by Collateral Type (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | $ 110,087 |  | $ 87,373
Fair value of securities acquired | 14,056 | $ 0 |
Fair value of securities sold | 0 | 2,678 |
Principal balance of securities called | 0 | 0 |
Net unrealized gains on AFS securities | 8,656 | $ 5,007 |
Mezzanine |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | 9,219 |  | 0
Sequoia securities |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | 87,647 |  | 78,942
Multifamily securities |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | 4,470 |  | 4,460
Other third-party residential securities |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | 8,751 |  | 3,971
Total Subordinate |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Available-for-sale | $ 100,868 |  | $ 87,373

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