Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)		62,714,487		52,900,314	62,714,487	52,900,314	40,551,193
Beginning balance		$ 1,306,995		$ 1,087,303	$ 1,306,995	$ 1,087,303	$ 834,406
Net investment income	$ 57,244	$ 40,565	$ 39,329	$ 32,665	201,084	145,730	98,391
Net realized gain (loss) on investments / foreign currency transactions / forward currency contracts					(43,462)	(11,719)	29,305
Net unrealized (depreciation) appreciation on investments / foreign currency transactions / forward currency contracts					39,330	17,786	(47,817)
Return of capital and other tax related adjustments					0	0	0
Purchases of shares in repurchase plan					(56,061)	(38,531)
Dividends / distributions					(184,988)	(130,198)	(85,376)
Issuance of common stock					$ 713,738	$ 236,624	$ 258,394
Ending balance (in shares)	95,007,965		62,714,487		95,007,965	62,714,487	52,900,314
Ending balance	$ 1,976,636		$ 1,306,995		$ 1,976,636	$ 1,306,995	$ 1,087,303
Common Stock
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)		62,714,487		52,900,314	62,714,487	52,900,314	40,551,193
Beginning balance		$ 63		$ 53	$ 63	$ 53	$ 41
Purchases of shares in repurchase plan (in shares)					(2,683,648)	(1,850,649)
Purchases of shares in repurchase plan					$ (3)	$ (2)
Dividends/distributions (in shares)					787,014	275,127	21,569
Dividends / distributions					$ 1
Issuance of common stock (in shares)					34,190,112	11,389,695	12,327,552
Issuance of common stock					$ 34	$ 12	$ 12
Ending balance (in shares)	95,007,965		62,714,487		95,007,965	62,714,487	52,900,314
Ending balance	$ 95		$ 63		$ 95	$ 63	$ 53
Additional Paid-In Capital
Investment Company, Net Assets [Roll Forward]
Beginning balance		1,281,007		1,076,497	1,281,007	1,076,497	818,723
Return of capital and other tax related adjustments					(1,439)	708	(1,059)
Purchases of shares in repurchase plan					(56,058)	(38,529)
Dividends / distributions					16,414	5,719	451
Issuance of common stock					713,704	236,612	258,382
Ending balance	1,953,628		1,281,007		1,953,628	1,281,007	1,076,497
Total Distributable Earnings
Investment Company, Net Assets [Roll Forward]
Beginning balance		$ 25,925		$ 10,753	25,925	10,753	15,642
Net investment income					201,084	145,730	98,391
Net realized gain (loss) on investments / foreign currency transactions / forward currency contracts					(43,462)	(11,719)	29,305
Net unrealized (depreciation) appreciation on investments / foreign currency transactions / forward currency contracts					39,330	17,786	(47,817)
Return of capital and other tax related adjustments					1,439	(708)	1,059
Dividends / distributions					(201,403)	(135,917)	(85,827)
Ending balance	$ 22,913		$ 25,925		$ 22,913	$ 25,925	$ 10,753