Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Investment income
Payment-in-kind interest income	$ 14,045	$ 11,829	$ 25,061	$ 23,628
Total investment income	213,892	164,230	434,592	329,000
Expenses
Interest and other debt financing expenses	69,911	44,125	149,554	85,685
Base management fee	21,714	13,662	43,295	27,618
Incentive fee	18,247	20,626	36,305	41,911
Professional fees	1,765	1,342	3,605	2,650
Administrative service fee	3,185	2,145	6,087	4,390
General and administrative expenses	408	384	969	765
Total expenses	115,230	82,284	239,815	163,019
Incentive fee waived (Note 3)	0	(5,157)	0	(5,157)
Net expenses	115,230	77,127	239,815	157,862
Net investment income - before tax	98,662	87,103	194,777	171,138
Excise and income tax	0	570	(475)	1,070
Net investment income - after tax	98,662	86,533	195,252	170,068
Net realized gain (loss) from:
Company investments			(42,220)	(17,368)
Foreign currency transactions	(174)	4,459	(3,879)	4,646
Forward currency contracts	5,997	0	7,203	0
Net realized gain (loss) on investment transactions	(11,041)	(13,818)	(38,896)	(12,722)
Net change in unrealized appreciation (depreciation) from:
Company investments			38,906	17,013
Translation of assets and liabilities in foreign currencies	11,427	(10,156)	(11,546)	(3,969)
Net change in unrealized appreciation (depreciation) on investment transactions	(8,783)	20,493	33,792	11,661
Net gain (loss) on investment transactions	(19,824)	6,675	(5,104)	(1,061)
Net realized gain (loss) on extinguishment of debt	0	0	(48)	0
(Provision) benefit for taxes on unrealized appreciation on investments	146	350	198	327
Net increase (decrease) in net assets resulting from operations	$ 78,984	$ 93,558	$ 190,298	$ 169,334
Per Common Share Data
Basic earnings per common share (Note 10) (in dollars per share)	$ 0.30	$ 0.55	$ 0.72	$ 1.00
Diluted earnings per common share (Note 10) (in dollars per share)	0.30	0.55	0.72	1.00
Dividends and distributions declared per common share (in dollars per share)	$ 0.39	$ 0.46	$ 0.87	$ 0.90
Basic weighted average common shares outstanding (Note 10) (in shares)	266,484,213	170,637,140	265,402,101	170,140,990
Diluted weighted average common shares outstanding (Note 10) (in shares)	266,484,213	170,637,140	265,402,101	170,140,990
Foreign exchange
Net realized gain (loss) from:
Forward currency contracts	$ 5,997	$ 0	$ 7,203	$ 0
Net change in unrealized appreciation (depreciation) from:
Forward currency contracts	(15,495)	4,332	6,432	(1,383)
Non-controlled/non-affiliate company investments
Investment income
Interest income	188,017	145,838	386,378	293,910
Payment-in-kind interest income	13,512	10,691	24,077	21,060
Dividend income	7,877	4,365	16,364	8,740
Fee income	1,690	452	2,245	817
Total investment income	211,096	161,346	429,064	324,527
Net realized gain (loss) from:
Company investments	(16,864)	240	(42,220)	1,149
Net change in unrealized appreciation (depreciation) from:
Company investments	(1,341)	15,644	38,744	18,691
Non-controlled affiliate company investments
Investment income
Interest income	2,241	1,723	4,484	1,830
Payment-in-kind interest income	414	1,031	746	2,359
Fee income	18	18	49	66
Total investment income	2,673	2,772	5,279	4,255
Net realized gain (loss) from:
Company investments	0	(18,517)	0	(18,517)
Net change in unrealized appreciation (depreciation) from:
Company investments	(2,933)	11,854	689	(371)
Controlled affiliate company investments
Investment income
Payment-in-kind interest income	119	107	238	209
Fee income	4	5	11	9
Total investment income	123	112	249	218
Net realized gain (loss) from:
Company investments			0
Net change in unrealized appreciation (depreciation) from:
Company investments	$ (441)	$ (1,181)	$ (527)	$ (1,307)