Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Operating activities:
Net increase (decrease) in net assets resulting from operations	$ 150,380	$ 213,435
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net unrealized (appreciation) depreciation	108,081	13,157
Net realized (gains) losses	31,351	5,774
PIK interest income	(9,266)	(7,481)
PIK dividend income	(369)	0
Accretion of original issue discount on investments	(23,007)	(22,729)
Accretion of original issue discount on unsecured notes payable	632	620
Amortization of deferred financing costs	6,153	5,825
Amortization of deferred offering costs	920	1,508
Deferred taxes	37	27
Purchases of investments	(2,127,964)	(2,977,628)
Proceeds from the sales and repayments of investments	2,109,840	1,208,850
Changes in operating assets and liabilities:
(Increase) decrease in due from Portfolio Companies	(593)	0
(Increase) decrease in interest receivable	6,663	(5,763)
(Increase) decrease in receivables from unsettled transactions	(71,168)	(23,457)
(Increase) decrease in due from broker	720	0
(Increase) decrease in other assets	(514)	(18,339)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	2,010	(681)
Increase (decrease) in base management fee and incentive fees payable	(2,193)	280
Increase (decrease) in due to broker	0	(2,630)
Increase (decrease) in due to affiliates	250	(337)
Increase (decrease) in interest payable	1,179	1,269
Increase (decrease) in payables from unsettled transactions	(63,867)	5,034
Increase (decrease) in director fees payable	0	(116)
Net cash provided by (used in) operating activities	119,275	(1,603,382)
Financing activities:
Distributions paid in cash	(235,195)	(195,521)
Borrowings under credit facilities	1,517,600	1,058,400
Repayments of borrowings under credit facilities	(1,395,500)	(514,500)
Proceeds from issuance of common shares	516,101	1,263,149
Deferred financing costs paid	(2,312)	(3,652)
Deferred offering costs paid	(335)	(1,765)
Share repurchases paid	(562,517)	(57,469)
Net cash provided by (used in) financing activities	(162,158)	1,548,642
Effect of exchange rate changes on foreign currency	598	1,875
Net increase (decrease) in cash and cash equivalents and restricted cash	(42,285)	(52,865)
Cash and cash equivalents and restricted cash, beginning of period	260,406	524,164
Cash and cash equivalents and restricted cash, end of period	218,121	471,299
Supplemental information:
Cash paid for interest	131,563	117,157
Non-cash financing activities:
Deferred offering costs incurred	33	390
Distribution payable	31,194	37,039
Reinvestment of dividends during the period	76,363	75,523
Shares repurchases accrued but not yet paid	$ 197,691	$ 175,010