STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investment Income, Nonoperating [Abstract]
PIK interest income	$ 784	$ 625
Total Investment Income	67,778	54,740
Expenses
Management fees	4,264	8,938
Performance-based incentive fees	6,196	1,043
Interest and other debt expenses	24,766	14,280
Administrative services expense	1,422	1,409
Other general and administrative expenses	2,256	2,365
Total expenses	38,904	28,035
Performance-based incentive fee offset	(274)	(68)
Expense reimbursements	(335)	(114)
Net Expenses	38,295	27,853
Net Investment Income	29,483	26,887
Net realized gains (losses):
Foreign currency transactions	41	(2,778)
Net realized gains (losses)	(834)	(2,021)
Net change in unrealized gains (losses):
Foreign currency translations	(1,020)	4,520
Net change in unrealized gains (losses)	1,483	(20,628)
Net Realized and Change in Unrealized Gains (Losses)	649	(22,649)
Net Increase (Decrease) in Net Assets Resulting from Operations	$ 30,132	$ 4,238
Earnings (Loss) Per Share - Basic	$ 0.46	$ 0.07
Non-controlled/Non-affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	$ 60,021	$ 43,318
Dividend Income, Operating	22	1
PIK interest income	329	231
Other income	1,934	1,303
Net realized gains (losses):
Net realized gains (losses)	(876)	757
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	(45)	(1,655)
Non-controlled/Affiliated Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	278	48
Dividend Income, Operating		331
PIK interest income	27	19
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	1,233	(3,610)
Controlled Investments
Investment Income, Nonoperating [Abstract]
Interest income (excluding Payment-in-kind ("PIK") interest income)	4,489	9,114
PIK interest income	428	375
Other income	250
Net realized gains (losses):
Net realized gains (losses)	1
Net change in unrealized gains (losses):
Net change in unrealized gains (losses)	$ 1,315	$ (19,883)