Unaudited Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)	95,007,965
Beginning balance	$ 1,976,636	$ 1,306,995	$ 1,306,995
Net investment income	53,484	40,565
Net realized gain (loss) on investments / foreign currency transactions / forward currency contracts	26,209	(18,873)
Net unrealized appreciation on investments / foreign currency transactions / forward currency contracts	(24,250)	29,706
Purchases of shares in repurchase plan	(12,789)	(32,160)
Dividends / distributions	(55,370)	(38,212)
Issuance of common stock	$ 214,539	$ 351,176
Ending balance (in shares)	104,987,948	78,202,476	95,007,965
Ending balance	$ 2,178,459	$ 1,639,197	$ 1,976,636
Common Stock
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)	95,007,965	62,714,487	62,714,487
Beginning balance	$ 95	$ 63	$ 63
Purchases of shares in repurchase plan (in shares)	(617,210)	(1,538,740)	(2,683,648)
Purchases of shares in repurchase plan		$ (2)
Dividends/distributions (in shares)	268,425	213,981
Issuance of common stock (in shares)	10,328,768	16,812,748
Issuance of common stock	$ 10	$ 17
Ending balance (in shares)	104,987,948	78,202,476	95,007,965
Ending balance	$ 105	$ 78	$ 95
Additional Paid-In Capital
Investment Company, Net Assets [Roll Forward]
Beginning balance	1,953,628	1,281,007	1,281,007
Purchases of shares in repurchase plan	(12,789)	(32,158)
Dividends / distributions	5,574	4,466
Issuance of common stock	214,529	351,159
Ending balance	2,160,942	1,604,474	1,953,628
Total Distributable Earnings
Investment Company, Net Assets [Roll Forward]
Beginning balance	22,913	25,925	25,925
Net investment income	53,484	40,565
Net realized gain (loss) on investments / foreign currency transactions / forward currency contracts	26,209	(18,873)
Net unrealized appreciation on investments / foreign currency transactions / forward currency contracts	(24,250)	29,706
Dividends / distributions	(60,944)	(42,678)
Ending balance	$ 17,412	$ 34,645	$ 22,913