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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) distribution | Dec. 31, 2022 USD ($) | Sep. 30, 2023 USD ($)
Equity [Abstract] |  |  |
Investment company, number of monthly distributions | distribution | 3 |  |
Investment company, cash distributions paid to common stockholders from ordinary income | 100.00% | 93.20% |
Investment company, cash distributions paid to common stockholders from capital gains |  | 6.80% |
Cash distributions to common stockholders | $ 10.8 | $ 7.4 |
Tax return of capital distribution |  |  | $ 5.0

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