INCOME TAXES - Net Assets Resulting From Operations To Estimated RIC Taxable Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Net unrealized depreciation on investments	$ 22,624	$ 9,458	$ 46,436	$ 11,968
Net unrealized (appreciation) depreciation on investments			(7,439)	8,599
(Expense/loss) income/gain recognized for tax on pass-through entities			(4,184)	35
(Gain) loss recognized on dispositions			(1,641)	(159)
Capital loss carryover			16,733	6,622
Net operating income - wholly-owned subsidiary			(2,990)	(1,568)
Dividend income from wholly-owned subsidiary			0	745
Non-deductible tax expense			252	251
Loss on extinguishment of debt			(1,363)	(1,363)
Non-deductible compensation			1,785	1,644
Compensation related book/tax differences			(3,851)	(3,583)
Interest on non-accrual loans			2,999	1,992
Other book/tax differences			2,525	805
Estimated distributable income before deductions for distributions			49,262	$ 25,988
Capital loss carryover	$ 46,900		$ 46,900