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Real Estate Securities - Schedule of Fair Value of AFS Securities by Type (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]
AFS	$ 204,602	$ 211,474
Senior
Debt and Equity Securities, FV-NI [Line Items]
AFS	39,318	39,365
Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
AFS	30,197	31,867
Subordinate
Debt and Equity Securities, FV-NI [Line Items]
AFS	135,087	140,242
Other third-party securities
Debt and Equity Securities, FV-NI [Line Items]
AFS	110,050	108,504
Other third-party securities | Senior
Debt and Equity Securities, FV-NI [Line Items]
AFS	39,318	39,365
Other third-party securities | Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
AFS	30,197	28,948
Other third-party securities | Subordinate
Debt and Equity Securities, FV-NI [Line Items]
AFS	40,535	40,191
Multifamily securities
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	11,749
Multifamily securities | Senior
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	0
Multifamily securities | Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	2,919
Multifamily securities | Subordinate
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	8,830
Jumbo Loan Securities
Debt and Equity Securities, FV-NI [Line Items]
AFS	94,552	91,221
Jumbo Loan Securities | Senior
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	0
Jumbo Loan Securities | Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
AFS	0	0
Jumbo Loan Securities | Subordinate
Debt and Equity Securities, FV-NI [Line Items]
AFS	$ 94,552	$ 91,221

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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