CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investment Income, Nonoperating [Abstract]
PIK interest income	$ 2,473	$ 812	$ 4,502	$ 1,597
Total Investment Income	69,156	68,616	137,486	136,395
Expenses
Management fees	4,389	4,334	8,775	8,598
Performance-based incentive fees	5,572	6,120	11,610	12,316
Interest and other debt expenses	26,992	26,002	53,170	50,768
Administrative services expense	826	1,425	2,049	2,848
Other general and administrative expenses	2,103	2,236	4,232	4,492
Total expenses	39,882	40,117	79,836	79,022
Performance-based incentive fee offset				(274)
Expense reimbursements	(267)	(351)	(434)	(686)
Net Expenses	39,615	39,766	79,402	78,062
Net Investment Income	29,541	28,850	58,084	58,333
Net realized gains (losses):
Foreign currency transactions	34	(4)	(584)	38
Net realized gains (losses)	(15,638)	(165)	(23,725)	(1,000)
Net change in unrealized gains (losses):
Foreign currency translations	(51)	(1,641)	727	(2,661)
Net change in unrealized gains (losses)	8,652	(3,280)	13,685	(1,797)
Net Realized and Change in Unrealized Gains (Losses)	(6,986)	(3,445)	(10,040)	(2,797)
Net Increase (Decrease) in Net Assets Resulting from Operations	$ 22,555	$ 25,405	$ 48,044	$ 55,536
Earnings (Loss) Per Share - Basic	$ 0.35	$ 0.39	$ 0.74	$ 0.85
Non-controlled/Non-affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	$ 60,146	$ 61,826	$ 120,142	$ 121,846
Dividend income	41	115	53	137
PIK interest income	2,438	339	4,433	668
Other income	894	1,034	2,601	2,969
Net realized gains (losses):
Net realized gains (losses)	28	(161)	(7,441)	(1,038)
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	(4,548)	1,386	436	1,342
Non-controlled/Affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	1,102	282	1,401	560
Dividend income	235	0	235	0
PIK interest income	35	32	69	60
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	(2,691)	(916)	(5,033)	316
Controlled Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	4,265	4,547	8,552	9,036
PIK interest income		441		869
Other income				250
Net realized gains (losses):
Net realized gains (losses)	(15,700)	0	(15,700)	0
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	$ 15,942	$ (2,109)	$ 17,555	$ (794)