INCOME TAXES - Net Assets Resulting From Operations To Estimated RIC Taxable Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Net unrealized depreciation on investments	$ 23,484	$ 2,949	$ 69,920	$ 14,917
Net unrealized (appreciation) depreciation on investments			(9,906)	13,989
(Expense/loss) income/gain recognized for tax on pass-through entities			(4,123)	10
(Gain) loss recognized on dispositions			(2,824)	(1,473)
Capital loss carryover			24,429	14,454
Net operating (income) loss - wholly-owned subsidiary			(4,931)	1,071
Dividend income from wholly-owned subsidiary			0	1,068
Non-deductible tax expense			640	466
Loss on extinguishment of debt			(2,045)	(2,045)
Non-deductible compensation			2,772	2,443
Compensation related book/tax differences			(466)	(1,471)
Interest on non-accrual loans			3,959	2,924
Other book/tax differences			3,580	960
Estimated distributable income before deductions for distributions			81,005	$ 47,313
Capital loss carryover	$ 58,000		$ 58,000