Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income
Total Investment Income	$ 449,055	$ 482,526	$ 438,087
Expenses
Interest	129,557	154,145	133,731
Management fees	52,176	51,786	46,382
Incentive fees on net investment income	43,469	45,530	42,590
Incentive fees on net capital gains	(5,071)	(5,375)	4,382
Professional fees	8,308	7,546	7,323
Directors’ fees	962	877	806
Other general and administrative	5,631	5,522	5,280
Total expenses	235,032	260,031	240,494
Management and incentive fees waived	(1,291)	(1,466)	(1,171)
Net Expenses	233,741	258,565	239,323
Net Investment Income Before Income Taxes	215,314	223,961	198,764
Income taxes, including excise taxes	5,319	3,944	2,365
Net Investment Income	209,995	220,017	196,399
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	44,777	(52,794)	18,854
Translation of other assets and liabilities in foreign currencies	(35,915)	13,379	(6,393)
Interest rate swaps	0	0	174
Income tax provision	520	(2,609)	556
Total net change in unrealized gains (losses)	9,382	(42,024)	13,191
Realized gains (losses):
Realized gains (losses) on investments	(47,415)	9,037	12,253
Foreign currency transactions	(505)	(464)	180
Income tax provision	(940)
Total net realized gains (losses)	(48,860)	8,573	12,433
Total Net Unrealized and Realized Gains (Losses)	(39,478)	(33,451)	25,624
Increase (Decrease) in Net Assets Resulting from Operations	$ 170,517	$ 186,566	$ 222,023
Earnings per common share—basic	$ 1.81	$ 2.03	$ 2.61
Weighted average shares of common stock outstanding—basic	94,098,870	92,035,165	85,131,264
Earnings per common share - diluted	$ 1.81	$ 2.03	$ 2.61
Weighted average shares of common stock outstanding - diluted	94,098,870	92,035,165	85,131,264
Investment, Unaffiliated Issuer [Member]
Income
Interest from investments	$ 390,428	$ 413,547	$ 391,343
Paid-in-kind interest income	25,586	29,335	19,679
Dividend income	2,345	11,678	4,181
Other income	20,338	18,525	15,122
Total Investment Income	438,697	473,085	430,325
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	41,511	(47,625)	40,571
Realized gains (losses):
Realized gains (losses) on investments	(31,106)	9,037	12,095
Investment, Affiliated Issuer, Noncontrolled [Member]
Realized gains (losses):
Realized gains (losses) on investments	0	0	158
Investment, Affiliated Issuer, Controlled [Member]
Income
Interest from investments	10,347	9,428	7,756
Other income	11	13	6
Total Investment Income	10,358	9,441	7,762
Net change in unrealized gains (losses):
Net Unrealized gains (losses) on investments	3,266	(5,169)	(21,717)
Realized gains (losses):
Realized gains (losses) on investments	$ (16,309)	$ 0	$ 0