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Multi-family Loans, at Fair Value - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Receivables [Abstract] |  |  |  |
Unrealized gains (losses) | $ 200,000 | $ (100,000) | $ 300,000 | $ (5,800,000)
Loan premiums, early redemption | $ 1,500,000 | $ 0 | $ 2,000,000.0 | $ 100,000

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- Definition Loan Premiums, Loans and Preferred Equity and Mezzanine Loans, Early Redemption + References No definition available. + Details
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- Definition Unrealized Gain (Loss) Loans and Preferred Equity + References No definition available. + Details
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- References No definition available. + Details
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