Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income
Total Investment Income	$ 438,087	$ 309,305	$ 278,593
Expenses
Interest	133,731	62,991	38,825
Management fees	46,382	39,900	37,081
Incentive fees on net investment income	42,590	33,401	33,062
Incentive fees on net capital gains	4,382	(8,864)	13,507
Professional fees	7,323	7,192	6,586
Directors’ fees	806	736	743
Other general and administrative	5,280	5,427	6,236
Total expenses	240,494	140,783	136,040
Management and incentive fees waived (Note 3)	(1,171)	(427)	(190)
Net Expenses	239,323	140,356	135,850
Net Investment Income Before Income Taxes	198,764	168,949	142,743
Income taxes, including excise taxes	2,365	2,622	384
Net Investment Income	196,399	166,327	142,359
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	18,854	(76,381)	49,738
Translation of other assets and liabilities in foreign currencies	(6,393)	8,721	(591)
Interest rate swaps	174	(6,748)	(6,699)
Income tax provision	556	(561)	(1,902)
Total net change in unrealized gains (losses)	13,191	(74,969)	40,546
Realized gains (losses):
Realized gains (losses) on investments	12,253	14,735	28,816
Interest rate swaps		2,251
Foreign currency transactions	180	(291)	59
Total net realized gains (losses)	12,433	16,695	28,875
Total Net Unrealized and Realized Gains (Losses)	25,624	(58,274)	69,421
Increase (Decrease) in Net Assets Resulting from Operations	$ 222,023	$ 108,053	$ 211,780
Earnings per common share—basic	$ 2.61	$ 1.38	$ 2.93
Weighted average shares of common stock outstanding—basic	85,131,264	78,197,826	72,169,488
Earnings per common share—diluted	$ 2.61	$ 1.38	$ 2.79
Weighted average shares of common stock outstanding—diluted	85,131,264	78,197,826	77,702,258
Non-controlled, Non-affiliated Investments
Income
Interest from investments	$ 411,022	$ 292,442	$ 261,782
Dividend income	4,181	2,159	3,426
Other income	15,122	9,502	7,751
Total Investment Income	430,325	304,103	272,959
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	40,571	(70,085)	17,938
Realized gains (losses):
Realized gains (losses) on investments	12,095	1,072	28,849
Non-controlled, Affiliated Investments
Income
Interest from investments		133	838
Dividend income			740
Total Investment Income		133	1,578
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments		(14,350)	14,350
Realized gains (losses):
Realized gains (losses) on investments	158	13,608	(33)
Controlled, Affiliated Investments
Income
Interest from investments	7,756	5,064	4,039
Other income	6	5	17
Total Investment Income	7,762	5,069	4,056
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	$ (21,717)	8,054	$ 17,450
Realized gains (losses):
Realized gains (losses) on investments		$ 55