Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Investment at cost	$ 3,117,330	$ 2,467,727
Restricted cash	7,932	8,823
Foreign currencies, cost	$ 23,188	$ 25,647
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	499,950,000	499,950,000
Common stock, shares issued (in shares)	95,007,965	62,714,487
Common stock, shares outstanding (in shares)	95,007,965	62,714,487
Total investments at fair value	$ 3,094,065	$ 2,458,929
Short-term investments
Investment at cost	10,201	0
Total investments at fair value	10,200	0
Non-Control / Non-Affiliate investments
Investment at cost	2,837,742	2,219,083
Total investments at fair value	2,802,456	2,187,808
Affiliate investments
Investment at cost	261,736	248,644
Total investments at fair value	273,758	271,121
Control investments
Investment at cost	7,651	0
Total investments at fair value	$ 7,651	$ 0