Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance	$ 612,541	$ 652,285	$ 560,000
Balance, shares	30,887,360
Net increase (decrease) in net assets resulting from operations:
Net investment income	$ 82,541	59,729	47,626
Net realized gain (loss) on investments, foreign currency transactions and foreign currency forwards	(12,879)	4,945	32,615
Net change in unrealized appreciation (depreciation) on investments, foreign currency forward contracts and foreign currency translation	13,142	(48,324)	4,789
Benefit (provision) for taxes on realized gain on investments	132	(911)	(1,177)
Benefit (provision) for taxes on unrealized appreciation (depreciation) on investments	901	$ 105	(220)
Issuance in connection with asset acquisition (Note 13), value	$ 91,257
Issuance of common stock			$ 52,632
Issuance of common stock, par amount	$ 1.81	$ 1.79	$ 1.69	$ 1.64
Deemed contribution from the Adviser	$ 22,040		$ 5,386
Distributions from distributable earnings	(67,081)	$ (55,288)	(48,843)
Equity offering costs			(523)
Total increase (decrease)	130,053	39,744	92,285
Balance	$ 742,594	$ 612,541	652,285	$ 560,000
Balance, shares	37,061,547	30,887,360
Common Stock
Balance	$ 31	$ 31	$ 28
Balance, shares	30,887,360	30,887,360	28,167,360
Net increase (decrease) in net assets resulting from operations:
Issuance in connection with asset acquisition (Note 13), share	6,174,187
Issuance in connection with asset acquisition (Note 13), par amount	$ 6
Issuance of common stock, share			2,720,000
Issuance of common stock, par amount			$ 3
Total increase (decrease), share	6,174,187		2,720,000
Total increase (decrease)	$ 6		$ 3
Balance	$ 37	$ 31	$ 31	$ 28
Balance, shares	37,061,547	30,887,360	30,887,360	28,167,360
Paid in Capital in Excess of Par Value
Balance	$ 675,008	$ 666,162	$ 594,658
Net increase (decrease) in net assets resulting from operations:
Issuance in connection with asset acquisition (Note 13), value	91,251
Issuance of common stock			52,629
Deemed contribution from the Adviser	22,040		5,386
Equity offering costs			(523)
Total increase (decrease)	113,291		57,492
Tax reclassification of stockholders' equity in accordance with GAAP (Note 11)	177,596	8,846	14,012
Balance	965,895	675,008	666,162	$ 594,658
Accumulated Earnings (Loss)
Balance	(62,498)	(13,908)	(34,686)
Net increase (decrease) in net assets resulting from operations:
Net investment income	82,541	59,729	47,626
Net realized gain (loss) on investments, foreign currency transactions and foreign currency forwards	(12,879)	4,945	32,615
Net change in unrealized appreciation (depreciation) on investments, foreign currency forward contracts and foreign currency translation	13,142	(48,324)	4,789
Benefit (provision) for taxes on realized gain on investments	132	(911)	(1,177)
Benefit (provision) for taxes on unrealized appreciation (depreciation) on investments	901	105	(220)
Distributions from distributable earnings	(67,081)	(55,288)	(48,843)
Total increase (decrease)	16,756	(39,744)	34,790
Tax reclassification of stockholders' equity in accordance with GAAP (Note 11)	(177,596)	(8,846)	(14,012)
Balance	$ (223,338)	$ (62,498)	$ (13,908)	$ (34,686)