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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, 2025	Dec. 31, 2024
Texas
Concentration Risk [Line Items]
Geographic concentration, percent	46.80%	36.10%
Florida
Concentration Risk [Line Items]
Geographic concentration, percent	15.10%	11.60%
Louisiana
Concentration Risk [Line Items]
Geographic concentration, percent	11.20%	8.80%
North Carolina
Concentration Risk [Line Items]
Geographic concentration, percent	7.70%	6.20%
Arkansas
Concentration Risk [Line Items]
Geographic concentration, percent	7.60%	10.30%
Indiana
Concentration Risk [Line Items]
Geographic concentration, percent	7.00%	5.60%

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