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Real Estate Securities - Additional Information (Details) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2024 USD ($) Investment | Jun. 30, 2023 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) Investment
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Number of AFS securities (in investments) | Investment | 76 |  |  | 66
Number of securities in unrealized loss position | Investment | 16 |  |  | 21
Number of securities in a continuous unrealized loss position for twelve consecutive months or longer (in investments) | Investment | 12 |  |  | 19
Gross unrealized losses | $ 5,349,000 |  |  | $ 6,753,000
CECL allowance | 1,339,000 |  | $ 1,853,000 | 2,482,000
Sales |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Gross realized gains | 0 | $ 1,000,000 |  |
Residential |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
AFS securities, contractual maturities, less than five years | 26,000,000 |  |  |
Marketable securities, due from five to ten years | 4,000,000 |  |  |
CECL allowance | $ 19,019,000 |  | $ 19,717,000 | $ 23,436,000

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