Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investment income:
Total interest income	$ 30,186	$ 27,320
Total dividend income	3,950	3,479
Total fee and other income	1,596	1,686
Total payment-in-kind interest income	1,493	1,743
Interest income from cash	13	11
Total investment income	37,238	34,239
Operating expenses:
Interest and other financing fees	13,540	11,293
Base management fee (Note 2)	519	486
Incentive management fees (Note 2)	3,199	2,699
Other general and administrative expenses (Note 2)	817	866
Total operating expenses	18,075	15,344
Net investment income before taxes	19,163	18,895
Income taxes, including excise tax expense	150	24
Net investment income after taxes	19,013	18,871
Net realized gains (losses):
Net realized gains (losses) on investments	(3,867)	(224)
Foreign currency transactions	(92)	467
Forward currency contracts	(6,541)	(10,175)
Net realized gains (losses)	(10,500)	(9,932)
Net unrealized appreciation (depreciation):
Net unrealized appreciation (depreciation) on investments	6,224	9,577
Foreign currency transactions	1,661	(2,634)
Forward currency contracts	11,641	9,611
Net unrealized appreciation (depreciation)	19,526	16,554
Net realized gains (losses) and unrealized appreciation (depreciation) on investments, foreign currency transactions and forward currency contracts	9,026	6,622
Net increase in net assets resulting from operations	$ 28,039	$ 25,493
Net investment income per share—basic (in dollars per share)	$ 0.65	$ 0.68
Net investment income per share— diluted (in dollars per share)	0.65	0.68
Net increase in net assets resulting from operations per share—basic and diluted (in dollars per share)	0.96	0.92
Dividends/distributions per share:
Total dividends/distributions, declared (in dollars per share)	0.64	0.60
Total dividends/distributions, paid (in dollars per share)	$ 0.64	$ 0.60
Weighted average shares outstanding—basic (in shares)	29,350,073	27,856,974
Weighted average shares outstanding—diluted (in shares)	29,350,073	27,856,974
Non-Control / Non-Affiliate investments
Investment income:
Total interest income	$ 29,846	$ 27,207
Total dividend income	800	562
Total fee and other income	1,574	1,676
Total payment-in-kind interest income	1,402	1,743
Net realized gains (losses):
Net realized gains (losses) on investments	(3,867)	(224)
Net unrealized appreciation (depreciation):
Net unrealized appreciation (depreciation) on investments	5,754	6,125
Affiliate investments
Investment income:
Total interest income	340	113
Total dividend income	3,150	2,917
Total fee and other income	22	10
Total payment-in-kind interest income	91	0
Net unrealized appreciation (depreciation):
Net unrealized appreciation (depreciation) on investments	$ 470	$ 3,452