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Real Estate Securities - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) Investment	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) Investment	Sep. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($) Investment	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
AFS	$ 284,372,000		$ 284,372,000			$ 211,474,000
Debt securities, available-for-sale, realized gain	0		1,200,000
Net unrealized gain on available-for-sale ("AFS") securities	$ 2,362,000	$ 7,373,000	$ 6,322,000	$ 17,083,000
Number of AFS securities (in investments) | Investment	63		63			90
Number of securities in unrealized loss position | Investment	11		11			20
Number of securities in a continuous unrealized loss position for twelve consecutive months or longer (in investments) | Investment	11		11			11
Allowance for credit loss	$ 795,000	$ 867,000	$ 795,000	$ 867,000	$ 839,000	$ 921,000	$ 1,339,000	$ 2,482,000
Legacy Bridge Loans
Debt and Equity Securities, FV-NI [Line Items]
Fair value of loans	484,000,000		484,000,000		484,000,000
Residential
Debt and Equity Securities, FV-NI [Line Items]
AFS securities, contractual maturities, less than five years	0		0
Marketable securities, due from five to ten years	5,000,000		5,000,000
Subordinate
Debt and Equity Securities, FV-NI [Line Items]
AFS	284,372,000		284,372,000			140,242,000
Allowance for credit loss	795,000		795,000			$ 921,000
Subordinate | Legacy Investments
Debt and Equity Securities, FV-NI [Line Items]
AFS	$ 182,000,000		$ 182,000,000		$ 182,000,000

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