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Real Estate Securities - Additional Information (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) entity investment | Dec. 31, 2021 USD ($) investment
Investment Holdings [Line Items] |  |
Number of AFS securities (in investments) | investment | 82 | 85
Number of securities in unrealized loss position | investment | 6 | 4
Number of securities in a continuous unrealized loss position for twelve consecutive months or longer (in investments) | investment |  | 1
Gross unrealized losses | $ 2,045 | $ 297
Additions to allowance for credit losses on securities for which credit losses were not previously recorded | $ 705 |
Variable Interest Entity, Not Primary Beneficiary |  |
Investment Holdings [Line Items] |  |
Number of entities called | entity | 3 |
Unpaid principal balance of loans purchased | $ 102,000 |
Gain related to called security | 300 |
Residential |  |
Investment Holdings [Line Items] |  |
AFS securities, contractual maturities, less than five years | 12,000 |
Marketable securities, due from five to ten years | $ 4,000 |

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