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Summary of Significant Accounting Policies - Additional Information (Details)		3 Months Ended	12 Months Ended
	Mar. 05, 2026 USD ($)	Mar. 31, 2026 USD ($) Security	Dec. 31, 2025 USD ($)
Variable Interest Entity [Line Items]
Financing receivable, after allowance for credit loss		$ 33,200,000
Cash proceeds from secured borrowings of CMBS securitizations held in variable interest entities		19,769,000
Nonaccrual, interest income		200,000
Recoveries		0	$ 0
Mezzanine Loan
Variable Interest Entity [Line Items]
Financing receivable, after allowance for credit loss		22,100,000
Preferred Equity Loans
Variable Interest Entity [Line Items]
Financing receivable, after allowance for credit loss		11,100,000	11,100,000
Preferred Equity Loans \| Past Due
Variable Interest Entity [Line Items]
Financing receivable, after allowance for credit loss		0	0
Collateral
Variable Interest Entity [Line Items]
Collateral amortized cost basis		558,716,000	$ 686,571,000
Collateral \| Individually Evaluated Multifamily Loans
Variable Interest Entity [Line Items]
Collateral amortized cost basis		$ 24,800,000
Noncontrolling interest in CMBS VIEs
Variable Interest Entity [Line Items]
Number of CMBS securities \| Security		9
Cash proceeds from secured borrowings of CMBS securitizations held in variable interest entities	$ 19,000,000
Noncontrolling interest in CMBS VIEs \| Subordinate Tranche
Variable Interest Entity [Line Items]
Variable interest entity, qualitative or quantitative information, ownership percentage		100.00%
ASU 2023-09
Variable Interest Entity [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true