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Equity Investments, at Fair Value - Schedule of Income From Multi-Family Preferred Equity Ownership Interests (Details) - Multi-Family Preferred Equity Ownership Interests - Equity investments - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | $ 5,951 | $ 5,775
1122 Chicago DE, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 251 | 237
Bighaus, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 537 | 465
FF/RMI 20 Midtown, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 799 | 798
Palms at Cape Coral, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 177 | 155
America Walks at Port St. Lucie, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 1,126 | 902
EHOF-NYMT Sunset Apartments Preferred, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 625 | 549
Lucie at Tradition Holdings, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 684 | 601
Syracuse Apartments and Townhomes, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 654 | 516
Hudson Bridge Apartments, LLC - Series A, Briar Hill Apartments, LLC, Kings Glen Apartments, LLC, Flagstone Apartments, LLC, Brookfield Apartments II, LLC - Series B, and Silber JBSM Properties, LLC (collectively) |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 301 | 0
Tides on 27th Investors, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 797 | 0
DCP Gold Creek, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | 853
Rigsbee Ave Holdings, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | (174)
Walnut Creek Properties Holdings, L.L.C. |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | (153)
Lurin-RMI, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | 280
Somerset Deerfield Investor, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | 587
RS SWD Owner, LLC, RS SWD Mitchell Owner, LLC, RS SWD IF Owner, LLC, RS SWD Mullis Owner, LLC, RS SWD JH Mullis Owner, LLC and RS SWD Saltzman Owner, LLC (collectively) |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | $ 0 | $ 159

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