FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Investment Company, Financial Highlights [Roll Forward]
Net asset value at beginning of period (in dollars per share)	$ 11.28	$ 11.05
Net investment income (in dollars per share)	0.28	0.25
Net realized gain (loss) on investments / foreign currency transactions / forward currency contracts (in dollars per share)	(0.20)	(0.08)
Net unrealized appreciation (depreciation) on investments / CSAs / foreign currency transactions / forward currency contracts (in dollars per share)	0.34	0.20
Total increase (decrease) from investment operations (in dollars per share)	0.42	0.37
Dividends/distributions paid to stockholders from net investment income (in dollars per share)	(0.26)	(0.25)
Purchases of shares in share repurchase plan (in dollars per share)	0	0
Net asset value at end of period (in dollars per share)	11.44	11.17
Market value at end of period (in dollars per share)	$ 9.56	$ 7.94
Shares outstanding at end of period (in shares)	105,951,159	107,916,166	106,067,070
Net assets at end of period	$ 1,211,876	$ 1,205,001
Average net assets	$ 1,205,141	$ 1,205,207
Ratio of total expenses, including loss on extinguishment of debt and provision for taxes, to average net assets (annualized)	13.43%	13.20%
Ratio of net investment income to average net assets (annualized)	9.74%	9.13%
Portfolio turnover ratio (annualized)	4.69%	2.56%
Total return	11.44%	0.59%