Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Operations:
Net investment income	$ 102,293	$ 72,205
Net unrealized appreciation (depreciation)	(32,141)	963
Net realized gains (losses)	6,953	3,677
Provision for income tax (expense) benefit	(87)	(65)
Net increase (decrease) in net assets resulting from operations	77,018	76,780
Distributions to common shareholders:
Net decrease in net assets resulting from distributions	(109,191)	(82,912)
Share transactions:
Issuance of Common shares in private and public offering	315,482	251,493
Issuance of Common shares under distribution reinvestment plan	29,550	23,524
Repurchased shares, net of early repurchase deduction	(191,101)	(20,909)
Total increase (decrease) in net assets	121,758	247,976
Net assets at beginning of period	4,541,805	3,164,340
Net assets at end of period	$ 4,663,563	$ 3,412,316
Net asset value per common share (in dollars per share)	$ 22.93	$ 23.52
Common shares outstanding at end of period (in shares)	203,377,000	145,073,000
Class I shares
Distributions to common shareholders:
Net decrease in net assets resulting from distributions	$ (80,162)	$ (56,990)
Share transactions:
Issuance of Common shares in private and public offering	260,769	173,985
Share transfers between classes	1,371	1,056
Issuance of Common shares under distribution reinvestment plan	14,986	10,465
Repurchased shares, net of early repurchase deduction	(138,650)	(12,962)
Net increase from share transactions	$ 138,476	$ 172,544
Net asset value per common share (in dollars per share)	$ 22.93	$ 23.52
Common shares outstanding at end of period (in shares)	145,699,000	97,207,000
Class S shares
Distributions to common shareholders:
Net decrease in net assets resulting from distributions	$ (28,791)	$ (25,863)
Share transactions:
Issuance of Common shares in private and public offering	47,358	76,853
Share transfers between classes	(1,371)	(1,056)
Issuance of Common shares under distribution reinvestment plan	14,541	13,033
Repurchased shares, net of early repurchase deduction	(52,427)	(7,870)
Net increase from share transactions	$ 8,101	$ 80,960
Net asset value per common share (in dollars per share)	$ 22.93	$ 23.52
Common shares outstanding at end of period (in shares)	57,129,000	47,759,000
Class D shares
Distributions to common shareholders:
Net decrease in net assets resulting from distributions	$ (173)	$ (59)
Share transactions:
Issuance of Common shares in private and public offering	5,327	655
Issuance of Common shares under distribution reinvestment plan	9	26
Repurchased shares, net of early repurchase deduction	(24)	(77)
Net increase from share transactions	$ 5,312	$ 604
Net asset value per common share (in dollars per share)	$ 22.93	$ 23.52
Common shares outstanding at end of period (in shares)	407,000	107,000
Class T shares
Distributions to common shareholders:
Net decrease in net assets resulting from distributions	$ (65)	$ 0
Share transactions:
Issuance of Common shares in private and public offering	2,028	0
Issuance of Common shares under distribution reinvestment plan	14	0
Net increase from share transactions	$ 2,042	$ 0
Net asset value per common share (in dollars per share)	$ 22.93	$ 0
Common shares outstanding at end of period (in shares)	142,000