Unaudited Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)	29,270,679
Beginning balance	$ 651,996	$ 602,099
Net investment income	19,013	18,871
Net realized loss on investments / foreign currency transactions / forward currency contracts	(10,500)	(9,932)
Net unrealized appreciation on investments / foreign currency transactions / forward currency contracts	19,526	16,554
Dividends/distributions	$ (9,794)	$ (9,153)
Ending balance (in shares)	29,672,058	28,142,612
Ending balance	$ 670,241	$ 618,439
Common Stock
Investment Company, Net Assets [Roll Forward]
Beginning balance (in shares)	29,270,679	27,795,215
Beginning balance	$ 29	$ 28
Dividends/distributions (in shares)	401,379	347,397
Dividends/distributions	$ 0	$ 0
Ending balance (in shares)	29,672,058	28,142,612
Ending balance	$ 29	$ 28
Additional Paid-In Capital
Investment Company, Net Assets [Roll Forward]
Beginning balance	635,451	603,002
Dividends/distributions	8,939	7,525
Ending balance	644,390	610,527
Total Distributable Earnings
Investment Company, Net Assets [Roll Forward]
Beginning balance	16,516	(931)
Net investment income	19,013	18,871
Net realized loss on investments / foreign currency transactions / forward currency contracts	(10,500)	(9,932)
Net unrealized appreciation on investments / foreign currency transactions / forward currency contracts	19,526	16,554
Dividends/distributions	(18,733)	(16,678)
Ending balance	$ 25,822	$ 7,884