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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Cost Recovery Loans (Parenthetical) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Equity contribution rate	90.00%		90.00%
Payment in kind interest	$ 5.1	$ 0.0	$ 5.5	$ 0.0
Turner Consulting
Financing Receivable, Credit Quality Indicator [Line Items]
Equity contribution rate	10.00%		10.00%
Retail Center - Cincinnati, OH | Capitalization Rate
Financing Receivable, Credit Quality Indicator [Line Items]
Loan collateral, measurement input	0.09		0.09
Residential-for-Sale - Manhattan, NY | Discount Rate
Financing Receivable, Credit Quality Indicator [Line Items]
Loan collateral, measurement input	0.10		0.10

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