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INCOME TAXES - RIC Accumulated Earnings (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
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Income Tax Disclosure [Abstract] |  |  |
Undistributed ordinary income - tax basis | $ 16,070 | $ 12,682 | $ 21,083
Undistributed net realized (loss) gain | (30,201) | (17,252) | (17,924)
Unrealized (depreciation) appreciation on investments | (61,710) | (20,126) | (766)
Other temporary differences | (13,639) | 0 | (663)
Components of distributable earnings at year-end | $ (89,480) | $ (24,696) | $ 1,730

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