FINANCIAL HIGHLIGHTS - Financial Highlights, Additional Information (Details) - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Investment Company, Financial Highlights [Line Items]
Per share market value at end of period (in dollars per share)	$ 20.94	$ 19.47	$ 20.03	$ 18.47
Total distributions to stockholders (in dollars per share)	$ 1.44	$ 1.44
Ratio of operating expenses to average net assets	12.45%	12.80%
Base management fee
Investment Company, Financial Highlights [Line Items]
Ratio of operating expenses to average net assets	3.03%	3.14%
Income based fee and capital gains incentive fee
Investment Company, Financial Highlights [Line Items]
Ratio of operating expenses to average net assets	3.22%	3.64%
Interest and credit facility fees
Investment Company, Financial Highlights [Line Items]
Ratio of operating expenses to average net assets	5.83%	5.59%
Other operating expenses
Investment Company, Financial Highlights [Line Items]
Ratio of operating expenses to average net assets	0.37%	0.43%