Unaudited Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)			95,007,965
Beginning balance	$ 2,383,870	$ 1,759,611	$ 1,976,636	$ 1,306,995	$ 1,306,995
Net investment income	69,663	51,965	188,023	143,839
Net realized loss on investments / foreign currency transactions / forward currency contracts	(4,905)	(2,921)	(849)	(22,720)
Net unrealized (depreciation) appreciation on investments / foreign currency transactions / forward currency contracts	(5,879)	(2,454)	(19,644)	17,922
Benefit from taxes	54	0	54	0
Purchases of shares in repurchase plan	(45,839)	(14,496)	(117,225)	(50,250)
Dividends / distributions	(64,197)	(49,043)	(180,495)	(133,607)
Issuance of common stock	$ 313,055	$ 116,613	$ 799,322	$ 597,096
Ending balance (in shares)	128,852,866	89,457,636	128,852,866	89,457,636	95,007,965
Ending balance	$ 2,645,822	$ 1,859,275	$ 2,645,822	$ 1,859,275	$ 1,976,636
Common Stock
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)	115,580,795	84,372,403	95,007,965	62,714,487	62,714,487
Beginning balance	$ 116	$ 84	$ 95	$ 63	$ 63
Purchases of shares in repurchase plan (in shares)	(2,238,362)	(696,636)	(5,679,432)	(2,402,488)	(2,683,648)
Purchases of shares in repurchase plan	$ (2)	$ (1)	$ (6)	$ (3)
Dividends/distributions (in shares)	346,988	188,440	930,851	566,688
Dividends / distributions			$ 1	$ 1
Issuance of common stock (in shares)	15,163,445	5,593,429	38,593,482	28,578,949
Issuance of common stock	$ 15	$ 6	$ 39	$ 28
Ending balance (in shares)	128,852,866	89,457,636	128,852,866	89,457,636	95,007,965
Ending balance	$ 129	$ 89	$ 129	$ 89	$ 95
Additional Paid-In Capital
Investment Company, Net Assets [Roll Forward]
Beginning balance	2,380,607	1,733,622	1,953,628	1,281,007	1,281,007
Purchases of shares in repurchase plan	(45,837)	(14,495)	(117,219)	(50,247)
Dividends / distributions	7,164	3,928	19,282	11,834
Issuance of common stock	313,040	116,607	799,283	597,068
Ending balance	2,654,974	1,839,662	2,654,974	1,839,662	1,953,628
Total Distributable Earnings
Investment Company, Net Assets [Roll Forward]
Beginning balance	3,147	25,905	22,913	25,925	25,925
Net investment income	69,663	51,965	188,023	143,839
Net realized loss on investments / foreign currency transactions / forward currency contracts	(4,905)	(2,921)	(849)	(22,720)
Net unrealized (depreciation) appreciation on investments / foreign currency transactions / forward currency contracts	(5,879)	(2,454)	(19,644)	17,922
Benefit from taxes	54		54
Dividends / distributions	(71,361)	(52,971)	(199,778)	(145,442)
Ending balance	$ (9,281)	$ 19,524	$ (9,281)	$ 19,524	$ 22,913