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Multi-family Loans, at Fair Value - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Receivables [Abstract]
Unrealized gains (losses)	$ 0.1	$ (5.6)

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- Definition

Unrealized Gain (Loss) Loans and Preferred Equity

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No definition available.

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No definition available.

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