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Real Estate Securities - Additional Information (Details) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) investment entity | Mar. 31, 2022 USD ($) | 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 | 21 |  | 4
Number of securities in a continuous unrealized loss position for twelve consecutive months or longer (in investments) | investment |  |  | 1
Gross unrealized losses | $ 9,650 |  | $ 297
CECL credit allowance | 1,771 | $ 705 | 0
Realized gain on securities | $ 300 |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |
Investment Holdings [Line Items] |  |  |
Number of entities called | entity | 3 |  |
Unpaid principal balance of loans purchased | $ 102,000 |  |
Residential |  |  |
Investment Holdings [Line Items] |  |  |
AFS securities, contractual maturities, less than five years | 10,000 |  |
Marketable securities, due from five to ten years | 1,000 |  |
CECL credit allowance | $ 30,619 | $ 29,901 | $ 27,555

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