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Fair Value Disclosure - Additional Information (Details)		3 Months Ended				9 Months Ended		12 Months Ended
	May 24, 2021 USD ($)	Sep. 30, 2025 USD ($) Instrument	Jun. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024	Sep. 30, 2025 USD ($) Instrument	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) Instrument	Mar. 31, 2023 USD ($) ft²	Aug. 03, 2022 USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Impairment of real estate						$ 0		$ 0
Debt related to real estate owned, held for investment, net		$ 402,945,000				402,945,000		324,587,000
Assumption of real estate	$ 154,300,000
Loan Mortgage Sold Reversed Valuation Allowance Percentage		97.00%
Realized loss on investments				$ 700,000			$ 700,000
Amortized cost		$ 0				0		41,200,000
Valuation allowance			$ 1,200,000					0
Hotel Property Through a deed-in-Lieu of Foreclosure
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Real estate investment property, net									$ 75,000,000
Impairment of real estate						0		0
Hotel Property Through a deed-in-Lieu of Foreclosure | Discount Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Real estate investment, measurement input | ft²									0.105
Hotel Property Through a deed-in-Lieu of Foreclosure | Measurement Input, Cap Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Real estate investment, measurement input | ft²									0.095
Deed-In-Lieu Of Foreclosure
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Real estate investment property, net										$ 270,100,000
Impairment of real estate						$ 0		$ 0
Hotel - Washington D.C. | Subordinate Mortgage Portfolio Segment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Debt related to real estate owned, held for investment, net	$ 110,000,000
Hotel - Honolulu, HI
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan, mortgage, held-for-sale, price percentage					99.50%
Interest rate caps
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of Contracts | Instrument		2				2		2
Interest rate caps | Hotel - Washington D.C.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of Contracts | Instrument		1				1		1
Interest rate caps | Construction Financing | Multifamily Development - Brooklyn, NY
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of Contracts | Instrument		1				1		1

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