Consolidated Statements of Changes in Net Assets (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance	$ 639,188	$ 591,022	$ 652,285	$ 560,000
Par Amount			$ 21.12	$ 19.88
Net increase (decrease) in net assets resulting from operations:
Net investment income	15,953	12,728	$ 43,624	$ 35,140
Net realized gain (loss) on investments, foreign currency transactions and foreign currency forwards	(2,128)	27,817	4,701	32,176
Net change in unrealized appreciation (depreciation) on investments, foreign currency forward contracts and foreign currency translation	(15,602)	(23,476)	(34,737)	4,184
Benefit (provision) for taxes on realized gain on investments	(409)	2	(626)	(370)
Benefit (provision) for taxes on unrealized appreciation (depreciation) on investments	(192)	(392)	(20)	(332)
Distributions to stockholders	(14,208)	(11,549)	(42,625)	(34,646)
Total increase (decrease)	(16,586)	5,130	(29,683)	36,152
Balance	$ 622,602	$ 596,152	$ 622,602	$ 596,152
Balance, shares	30,887,360	28,167,360	30,887,360	28,167,360
Par Amount	$ 20.16	$ 21.16	$ 20.16	$ 21.16
Common Stock
Balance, shares	30,887,360	28,167,360	30,887,360	28,167,360
Par Amount	$ 31	$ 28	$ 31	$ 28
Net increase (decrease) in net assets resulting from operations:
Balance, shares	30,887,360	28,167,360	30,887,360	28,167,360
Par Amount	$ 31	$ 28	$ 31	$ 28
Paid in Capital in Excess of Par Value
Balance	$ 666,162	$ 594,658	$ 666,162	$ 594,658
Net increase (decrease) in net assets resulting from operations:
Balance	666,162	594,658	666,162	594,658
Accumulated Earnings (Loss)
Balance	(27,005)	(3,664)	(13,908)	(34,686)
Net increase (decrease) in net assets resulting from operations:
Net investment income	15,953	12,728	43,624	35,140
Net realized gain (loss) on investments, foreign currency transactions and foreign currency forwards	(2,128)	27,817	4,701	32,176
Net change in unrealized appreciation (depreciation) on investments, foreign currency forward contracts and foreign currency translation	(15,602)	(23,476)	(34,737)	4,184
Benefit (provision) for taxes on realized gain on investments	(409)	2	(626)	(370)
Benefit (provision) for taxes on unrealized appreciation (depreciation) on investments	(192)	(392)	(20)	(332)
Distributions to stockholders	(14,208)	(11,549)	(42,625)	(34,646)
Total increase (decrease)	(16,586)	5,130	(29,683)	36,152
Balance	$ (43,591)	$ 1,466	$ (43,591)	$ 1,466