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INCOME TAXES - Net Assets Resulting from Operations to Estimated RIC Taxable Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Income Tax Disclosure [Abstract] |  |  |  |
Net increase in net assets from operations | $ 22,684 | $ 22,624 | $ 36,719 | $ 46,436
Net unrealized depreciation (appreciation) on investments |  |  | 13,727 | (7,439)
(Expense/loss) income/gain recognized for tax on pass-through entities |  |  | (7) | (4,184)
Realized loss (gain) book/tax differences |  |  | 11,333 | 633
Capital loss carryover2 |  |  | (1,864) | 16,733
Net operating income loss - wholly-owned subsidiary |  |  | (2,008) | (2,990)
Non-deductible tax expense |  |  | 542 | 252
Loss on extinguishment of debt |  |  | (1,363) | (1,363)
Non-deductible compensation |  |  | 3,029 | 1,785
Compensation related book/tax differences |  |  | (6,184) | (3,851)
Interest on non-accrual loans |  |  | 7,093 | 2,999
Other book/tax differences |  |  | 303 | 251
Estimated distributable income before deductions for distributions |  |  | 61,320 | $ 49,262
Capital loss carryover | $ 58,200 |  | $ 58,200 |

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