Asset-Specific Debt, Net (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) loan	Dec. 31, 2023 USD ($) loan
Debt Instrument [Line Items]
Debt instrument, variable interest rate, type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR)	Secured Overnight Financing Rate (SOFR)
Asset-specific debt, net
Debt Instrument [Line Items]
Count, financing provided | loan	2	2
Count, collateral assets | loan	2	2
Principal Balance	$ 1,201,237	$ 1,004,097
Principal Balance, collateral assets	1,433,807	1,194,408
Book Value	1,197,056	1,000,210
Book Value, collateral assets	$ 1,425,388	$ 1,186,559
Wtd. Avg. Yield/Cost, financing provided	3.19%	3.14%
Wtd. Avg. Yield/Cost, collateral assets	4.06%	3.98%