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Real Estate Securities - Schedule of Carrying Value of AFS Securities by Type (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	$ 259,915		$ 191,438
Gross unrealized gains	29,104		26,631
Gross unrealized losses	(3,852)		(5,674)
Allowance for credit losses	(795)	$ (839)	(921)	$ (867)	$ (1,339)	$ (2,482)
AFS	284,372		211,474
Senior
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	0		39,135
Gross unrealized gains	0		230
Gross unrealized losses	0		0
Allowance for credit losses	0		0
AFS	0		39,365
Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	0		31,250
Gross unrealized gains	0		668
Gross unrealized losses	0		(51)
Allowance for credit losses	0		0
AFS	0		31,867
Subordinate
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	259,915		121,053
Gross unrealized gains	29,104		25,733
Gross unrealized losses	(3,852)		(5,623)
Allowance for credit losses	(795)		(921)
AFS	$ 284,372		$ 140,242

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