Distributions - Declared on GAAP Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Amount			$ 31,732	$ 27,697
% of Distributions Declared			100.00%	100.00%
Amount of expense support reimbursement	$ (2,875)	$ (353)	$ 1,017	$ 0	$ 20
Net Investment Income
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Amount			$ 14,470	$ 17,618
% of Distributions Declared			45.60%	63.60%
Amount of expense support reimbursement			$ 1,017	$ 0
Net realized gain
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Amount			$ 1,432	$ 0
% of Distributions Declared			4.50%	0.00%
Distributions in excess of net investment income
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Amount			$ 15,830	$ 10,079
% of Distributions Declared			49.90%	36.40%