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FINANCIAL HIGHLIGHTS - Schedule of Financial Highlights, Additional Information (Details) - $ / shares | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Investment Company, Financial Highlights [Line Items] |  |  |  |
Additional dividends declared (in dollars per share) |  | $ 0.09 |  |
Per share market value at end of period (in dollars per share) | $ 19.47 | 16.88 | $ 18.47 | $ 21.19
Total distributions to stockholders (in dollars per share) | $ 1.44 | $ 1.36 |  |
Ratio of operating expenses to average net assets | 12.80% | 9.77% |  |
Base management fees |  |  |  |
Investment Company, Financial Highlights [Line Items] |  |  |  |
Ratio of operating expenses to average net assets | 3.14% | 3.26% |  |
Income based fees and capital gains incentive fees |  |  |  |
Investment Company, Financial Highlights [Line Items] |  |  |  |
Ratio of operating expenses to average net assets | 3.64% | 1.54% |  |
Cost of borrowing |  |  |  |
Investment Company, Financial Highlights [Line Items] |  |  |  |
Ratio of operating expenses to average net assets | 5.59% | 4.54% |  |
Other operating expenses |  |  |  |
Investment Company, Financial Highlights [Line Items] |  |  |  |
Ratio of operating expenses to average net assets | 0.43% | 0.43% |  |

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