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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% |  |

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