Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operations:
Net investment income	$ 35,803	$ 10,097
Net unrealized appreciation (depreciation)	16,919	(2,842)
Net realized gains (losses)	453	(660)
Provision for income tax (expense) benefit	(241)	(51)
Net increase (decrease) in net assets resulting from operations	52,934	6,544
Distributions to common shareholders:
Distributions to common shareholders	(46,876)	(11,356)
Share transactions:
Issuance of Common shares in public offering	468,787	129,708
Issuance of Common shares under dividend reinvestment plan	11,647	1,832
Repurchased shares, net of early repurchase deduction	(10,526)
Total increase (decrease) in net assets	475,966	126,728
Net assets	$ 2,005,171	$ 493,455
Net asset value per common share (in dollars per share)	$ 23.62	$ 23.23
Common shares outstanding at end of period (in shares)	84,898,000	21,242,000
Common Class I
Distributions to common shareholders:
Distributions to common shareholders	$ (32,392)	$ (9,127)
Share transactions:
Issuance of Common shares in public offering	309,178	84,482
Issuance of Common shares under dividend reinvestment plan	5,139	1,045
Repurchased shares, net of early repurchase deduction	(8,729)	0
Net increase from share transactions	$ 305,588	$ 85,527
Net asset value per common share (in dollars per share)	$ 23.62	$ 23.23
Common shares outstanding at end of period (in shares)	57,111,000	16,690,000
Common Class S
Distributions to common shareholders:
Distributions to common shareholders	$ (14,475)	$ (2,229)
Share transactions:
Issuance of Common shares in public offering	159,230	45,226
Issuance of Common shares under dividend reinvestment plan	6,506	787
Repurchased shares, net of early repurchase deduction	(1,797)	0
Net increase from share transactions	$ 163,939	$ 46,013
Net asset value per common share (in dollars per share)	$ 23.62	$ 23.23
Common shares outstanding at end of period (in shares)	27,765,000	4,552,000
Common Class D
Distributions to common shareholders:
Distributions to common shareholders	$ (9)	$ 0
Share transactions:
Issuance of Common shares in public offering	379	0
Issuance of Common shares under dividend reinvestment plan	2	0
Repurchased shares, net of early repurchase deduction	0
Net increase from share transactions	$ 381	$ 0
Net asset value per common share (in dollars per share)	$ 23.62
Common shares outstanding at end of period (in shares)	22,000