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Equity Investments, at Fair Value - Schedule of Equity Investments Accounted under the Equity Method (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Fair Value	$ 130,583		$ 130,583		$ 152,246
Equity investments | Single-Family Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Fair Value	25,000		25,000		27,500
Equity investments | Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Fair Value	$ 155,583		$ 155,583		$ 179,746
FF/RMI 20 Midtown, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	51.00%		51.00%		51.00%
Fair Value	$ 28,711		$ 28,711		$ 27,079
Palms at Cape Coral, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	34.00%		34.00%		34.00%
Fair Value	$ 5,721		$ 5,721		$ 5,429
EHOF-NYMT Sunset Apartments Preferred, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	57.00%		57.00%		57.00%
Fair Value	$ 19,292		$ 19,292		$ 18,139
Lucie at Tradition Holdings, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	70.00%		70.00%		70.00%
Fair Value	$ 18,948		$ 18,948		$ 17,576
Syracuse Apartments and Townhomes, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	58.00%		58.00%		58.00%
Fair Value	$ 21,241		$ 21,241		$ 20,115
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) | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	58.00%		58.00%		58.00%
Fair Value	$ 9,724		$ 9,724		$ 9,277
Tides on 27th Investors, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	54.00%		54.00%		0.00%
Fair Value	$ 17,320		$ 17,320		$ 0
Rapid City RMI JV LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	50.00%		50.00%		0.00%
Fair Value	$ 9,626		$ 9,626		$ 0
America Walks at Port St. Lucie, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	0.00%		0.00%		62.00%
Fair Value	$ 0		$ 0		$ 29,873
1122 Chicago DE, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	0.00%		0.00%		53.00%
Fair Value	$ 0		$ 0		$ 8,276
Bighaus, LLC | Equity investments | Multi-Family Preferred Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	0.00%		0.00%		42.00%
Fair Value	$ 0		$ 0		$ 16,482
Constructive Loans, LLC | Single-Family Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Purchase of residential loans	$ 15,300	$ 5,500	$ 55,200	$ 257,800
Constructive Loans, LLC | Equity investments | Single-Family Equity Ownership Interests
Schedule of Equity Method Investments [Line Items]
Ownership Interest	50.00%		50.00%		0.00%
Fair Value	$ 25,000		$ 25,000		$ 27,500
Option to purchase issued and outstanding interests, percentage	50.00%		50.00%

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of increase in financing receivable from purchase. Excludes net investment in lease.

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