Share Data and Distributions - Schedule of Source of Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2026	Jun. 30, 2025
Class of Stock [Line Items]
Total	$ 92,988	$ 105,636	$ 109,191	$ 107,821	$ 91,112	$ 82,912
Class I shares
Class of Stock [Line Items]
Net investment income (in dollars per share)							$ 1.4570	$ 1.4962
Net investment income							$ 214,228	$ 163,586
Distributions in excess of net investment income (in dollars per share)							$ 0.0830	$ 0.3038
Distributions in excess of net investment income							$ 12,894	$ 34,264
Total (in dollars per share)							$ 1.5400	$ 1.8000
Total							$ 227,122	$ 197,850
Class S shares
Class of Stock [Line Items]
Net investment income (in dollars per share)							$ 1.3132	$ 1.3484
Net investment income							$ 75,164	$ 68,644
Distributions in excess of net investment income (in dollars per share)							$ 0.0818	$ 0.3023
Distributions in excess of net investment income							$ 4,725	$ 15,122
Total (in dollars per share)							$ 1.3950	$ 1.6507
Total							$ 79,889	$ 83,766
Class D shares
Class of Stock [Line Items]
Net investment income (in dollars per share)							$ 1.4216	$ 1.4566
Net investment income							$ 531	$ 190
Distributions in excess of net investment income (in dollars per share)							$ 0.0756	$ 0.2996
Distributions in excess of net investment income							$ 33	$ 39
Total (in dollars per share)							$ 1.4972	$ 1.7562
Total							$ 564	$ 229
Class T shares
Class of Stock [Line Items]
Net investment income (in dollars per share)							$ 1.3132
Net investment income							$ 226
Distributions in excess of net investment income (in dollars per share)							$ 0.0818
Distributions in excess of net investment income							$ 14
Total (in dollars per share)							$ 1.3950
Total							$ 240