Income Tax Information and Distributions to Unitholders and Other Tax Information - Summary of Investment Company Distribution to Shareholders (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investment Company, Tax Information and Distributions to Unitholders [Line Items]
Ordinary income	$ 28,464	$ 19,841	$ 11,237
Capital gains	0	424	723
Distributions recognized in subsequent year	(417)	0	0
Total Distributions	$ 28,881	$ 20,265	$ 11,960
Ordinary income, Percent	98.60%	97.90%	94.00%
Capital gains, Percent	0.00%	2.10%	6.00%
Distributions recognized in subsequent year, Percent	1.40%	0.00%	0.00%
Total distributions, Percent	100.00%	100.00%	100.00%