Asset-Specific Debt, Net (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Financing provided
Participating Mortgage Loans [Line Items]
Count | loan	2	4
Financing provided, Principal Balance	$ 935,435	$ 950,278
Financing provided, Book Value	$ 930,757	$ 942,503
Financing provided | LIBOR
Participating Mortgage Loans [Line Items]
Wtd. Avg. Yield/Cost	3.13%	3.29%
Collateral assets
Participating Mortgage Loans [Line Items]
Count | loan	2	4
Collateral assets, Principal Balance	$ 1,111,453	$ 1,094,450
Collateral assets, Book Value	$ 1,102,848	$ 1,081,035
Collateral assets | LIBOR
Participating Mortgage Loans [Line Items]
Wtd. Avg. Yield/Cost	3.95%	4.73%