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Multi-family Loans, at Fair Value - Schedule of Geographic Concentration Risk (Details) - Preferred Equity and Mezzanine Loan Investments - Geographic Concentration Risk	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Texas
Concentration Risk [Line Items]
Geographic concentration, percent	35.10%	32.60%
Tennessee
Concentration Risk [Line Items]
Geographic concentration, percent	16.40%	15.20%
Florida
Concentration Risk [Line Items]
Geographic concentration, percent	11.30%	10.50%
Arkansas
Concentration Risk [Line Items]
Geographic concentration, percent	10.10%	9.50%
Louisiana
Concentration Risk [Line Items]
Geographic concentration, percent	8.50%	7.50%
North Carolina
Concentration Risk [Line Items]
Geographic concentration, percent	6.10%	5.80%
Indiana
Concentration Risk [Line Items]
Geographic concentration, percent	5.50%	5.30%

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