CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investment Income, Nonoperating [Abstract]
PIK interest income	$ 2,029	$ 784
Total Investment Income	68,331	67,778
Expenses
Management fees	4,386	4,264
Performance-based incentive fees	6,038	6,196
Interest and other debt expenses	26,179	24,766
Administrative services expense	1,223	1,422
Other general and administrative expenses	2,129	2,256
Total expenses	39,955	38,904
Performance-based incentive fee offset		(274)
Expense reimbursements	(168)	(335)
Net Expenses	39,787	38,295
Net Investment Income	28,544	29,483
Net realized gains (losses):
Foreign currency transactions	(618)	41
Net realized gains (losses)	(8,088)	(834)
Net change in unrealized gains (losses):
Foreign currency translations	778	(1,020)
Net change in unrealized gains (losses)	5,033	1,483
Net Realized and Change in Unrealized Gains (Losses)	(3,055)	649
Net Increase (Decrease) in Net Assets Resulting from Operations	$ 25,489	$ 30,132
Earnings (Loss) Per Share - Basic	$ 0.39	$ 0.46
Non-controlled/Non-affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	$ 59,996	$ 60,021
Dividend income	12	22
PIK interest income	1,995	329
Other income	1,708	1,934
Net realized gains (losses):
Net realized gains (losses)	(7,470)	(876)
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	4,983	(45)
Non-controlled/Affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	299	278
Dividend income	0	0
PIK interest income	34	27
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	(2,341)	1,233
Controlled Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	4,287	4,489
PIK interest income		428
Other income		250
Net realized gains (losses):
Net realized gains (losses)		1
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	$ 1,613	$ 1,315