Financial Highlights - Schedule of Financial Highlights (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025		Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024	Dec. 31, 2024	[4],[5],[6]
OPERATING PERFORMANCE PER SHARE
Net Assets	$ 1,371,087	[1],[2],[3]		$ 1,371,087	[1],[2],[3]		$ 1,231,208
Distributions declared				$ 31,732		$ 27,697
Class FA  Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 39.55		$ 36.67
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				1.00		1.04
Expense Support (reimbursement) (in usd per share)				0		0
Net investment income (in usd per share)				1.00		1.04
Net realized and unrealized gains, net of taxes (in usd per share)				2.44		1.64
Net increase resulting from investment operations (in usd per share)	$ 1.27		$ 0.88	3.44		2.68
Distributions to shareholders (in usd per share)				(0.94)		(0.94)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.94)		(0.94)
Net Asset Value, End of Period (in usd per share)	$ 42.05		$ 38.41	$ 42.05		$ 38.41
Net Assets	$ 162,757		$ 155,153	$ 162,757		$ 155,153
Average net assets				$ 159,387		$ 153,495
Shares outstanding end of period (in shares)	3,871		4,040	3,871		4,040
Distributions declared				$ 3,700		$ 3,861
Total investment return based on net asset value before total return incentive fee (as a percent)				9.80%		8.18%
Total investment return based on net asset value after total return incentive fee (as a percent)				8.57%		7.20%
Ratios to average net assets:
Total operating expenses before total return incentive fee				0.83%		0.87%
Total operating expenses before Expense Support (reimbursement)				1.77%		1.67%
Total operating expenses after Expense Support (reimbursement)				1.77%		1.67%
Net investment income before total return incentive fee				3.42%		3.57%
Net investment income				2.48%		2.78%
Class A Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 35.68		$ 33.57
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				0.34		0.51
Expense Support (reimbursement) (in usd per share)				0		0
Net investment income (in usd per share)				0.34		0.51
Net realized and unrealized gains, net of taxes (in usd per share)				2.43		1.64
Net increase resulting from investment operations (in usd per share)	$ 0.96		$ 0.74	2.77		2.15
Distributions to shareholders (in usd per share)				(0.94)		(0.94)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.94)		(0.94)
Net Asset Value, End of Period (in usd per share)	$ 37.51		$ 34.78	$ 37.51		$ 34.78
Net Assets	$ 333,763		$ 257,844	$ 333,763		$ 257,844
Average net assets				$ 300,536		$ 208,435
Shares outstanding end of period (in shares)	8,897		7,413	8,897		7,413
Distributions declared				$ 8,008		$ 5,733
Total investment return based on net asset value before total return incentive fee (as a percent)				9.80%		7.91%
Total investment return based on net asset value after total return incentive fee (as a percent)				7.87%		6.50%
Ratios to average net assets:
Total operating expenses before total return incentive fee				2.04%		2.05%
Total operating expenses before Expense Support (reimbursement)				4.03%		3.69%
Total operating expenses after Expense Support (reimbursement)				4.03%		3.69%
Net investment income before total return incentive fee				2.95%		3.14%
Net investment income				0.96%		1.49%
Class T Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 35.72		$ 33.64
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				0.08		0.30
Expense Support (reimbursement) (in usd per share)				0		0
Net investment income (in usd per share)				0.08		0.30
Net realized and unrealized gains, net of taxes (in usd per share)				2.41		1.64
Net increase resulting from investment operations (in usd per share)	$ 0.92		$ 0.64	2.49		1.94
Distributions to shareholders (in usd per share)				(0.75)		(0.75)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.75)		(0.75)
Net Asset Value, End of Period (in usd per share)	$ 37.46		$ 34.83	$ 37.46		$ 34.83
Net Assets	$ 84,073		$ 89,487	$ 84,073		$ 89,487
Average net assets				$ 86,273		$ 88,129
Shares outstanding end of period (in shares)	2,244		2,569	2,244		2,569
Distributions declared				$ 1,790		$ 1,943
Total investment return based on net asset value before total return incentive fee (as a percent)				8.91%		7.31%
Total investment return based on net asset value after total return incentive fee (as a percent)				7.06%		5.84%
Ratios to average net assets:
Total operating expenses before total return incentive fee				2.76%		2.57%
Total operating expenses before Expense Support (reimbursement)				4.46%		3.98%
Total operating expenses after Expense Support (reimbursement)				4.46%		3.98%
Net investment income before total return incentive fee				1.90%		2.31%
Net investment income				0.21%		0.90%
Class D Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 35.42		$ 33.31
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				0.24		0.42
Expense Support (reimbursement) (in usd per share)				0		0
Net investment income (in usd per share)				0.24		0.42
Net realized and unrealized gains, net of taxes (in usd per share)				2.42		1.64
Net increase resulting from investment operations (in usd per share)	$ 0.94		$ 0.66	2.66		2.06
Distributions to shareholders (in usd per share)				(0.84)		(0.84)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.84)		(0.84)
Net Asset Value, End of Period (in usd per share)	$ 37.24		$ 34.53	$ 37.24		$ 34.53
Net Assets	$ 113,745		$ 106,647	$ 113,745		$ 106,647
Average net assets				$ 108,686		$ 95,173
Shares outstanding end of period (in shares)	3,054		3,089	3,054		3,089
Distributions declared				$ 2,577		$ 2,378
Total investment return based on net asset value before total return incentive fee (as a percent)				9.54%		7.76%
Total investment return based on net asset value after total return incentive fee (as a percent)				7.62%		6.29%
Ratios to average net assets:
Total operating expenses before total return incentive fee				2.30%		2.28%
Total operating expenses before Expense Support (reimbursement)				4.17%		3.83%
Total operating expenses after Expense Support (reimbursement)				4.17%		3.83%
Net investment income before total return incentive fee				2.55%		2.80%
Net investment income				0.68%		1.24%
Class I Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 36.12		$ 34.06
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				0.27		0.50
Expense Support (reimbursement) (in usd per share)				0.07		0
Net investment income (in usd per share)				0.34		0.50
Net realized and unrealized gains, net of taxes (in usd per share)				2.44		1.64
Net increase resulting from investment operations (in usd per share)	$ 0.92		$ 0.69	2.78		2.14
Distributions to shareholders (in usd per share)				(0.94)		(0.94)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.94)		(0.94)
Net Asset Value, End of Period (in usd per share)	$ 37.96		$ 35.26	$ 37.96		$ 35.26
Net Assets	$ 604,439		$ 487,709	$ 604,439		$ 487,709
Average net assets				$ 543,812		$ 447,371
Shares outstanding end of period (in shares)	15,924		13,832	15,924		13,832
Distributions declared				$ 14,057		$ 12,150
Total investment return based on net asset value before total return incentive fee (as a percent)				9.63%		7.91%
Total investment return based on net asset value after total return incentive fee (as a percent)				7.80%		6.37%
Ratios to average net assets:
Total operating expenses before total return incentive fee				2.24%		1.91%
Total operating expenses before Expense Support (reimbursement)				4.13%		3.48%
Total operating expenses after Expense Support (reimbursement)				3.95%		3.48%
Net investment income before total return incentive fee				2.82%		3.03%
Net investment income				0.93%		1.45%
Investment company, incentive allocation to average net assets, percentage				10.00%		7.00%
Class S Shares
OPERATING PERFORMANCE PER SHARE
Net Asset Value, Beginning of Period (in usd per share)				$ 40.09		$ 37.25
Net investment income, before reimbursement of Expense Support (reimbursement) (in usd per share)				0.97		1.01
Expense Support (reimbursement) (in usd per share)				0		0
Net investment income (in usd per share)				0.97		1.01
Net realized and unrealized gains, net of taxes (in usd per share)				2.43		1.64
Net increase resulting from investment operations (in usd per share)	$ 1.19		$ 0.87	3.40		2.65
Distributions to shareholders (in usd per share)				(0.94)		(0.94)
Net Decrease Resulting From Distributions to Shareholders (in usd per share)				(0.94)		(0.94)
Net Asset Value, End of Period (in usd per share)	$ 42.55		$ 38.96	$ 42.55		$ 38.96
Net Assets	$ 72,310		$ 67,080	$ 72,310		$ 67,080
Average net assets				$ 69,777		$ 65,922
Shares outstanding end of period (in shares)	1,699		1,721	1,699		1,721
Distributions declared				$ 1,600		$ 1,632
Total investment return based on net asset value before total return incentive fee (as a percent)				9.55%		8.02%
Total investment return based on net asset value after total return incentive fee (as a percent)				8.59%		7.21%
Ratios to average net assets:
Total operating expenses before total return incentive fee				0.92%		0.95%
Total operating expenses before Expense Support (reimbursement)				1.85%		1.72%
Total operating expenses after Expense Support (reimbursement)				1.85%		1.72%
Net investment income before total return incentive fee				3.30%		3.45%
Net investment income				2.38%		2.67%
Investment company, incentive allocation to average net assets, percentage						5.00%

[1] All investments are US based unless otherwise noted.

[2] Percentages represent fair value as a percentage of net assets for each investment category.

[3] Security may be an obligation of one or more entities affiliated with the named company.

[4] All investments are US based unless otherwise noted.

[5] Percentages represent fair value as a percentage of net assets for each investment category.

[6] Security may be an obligation of one or more entities affiliated with the named company.