INCOME TAXES - Net Assets Resulting from Operations to Estimated RIC Taxable Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Net increase in net assets from operations	$ 27,001	$ 14,035
Net unrealized depreciation (appreciation) on investments	20,592	15,535
(Expense/loss) income/gain recognized for tax on pass-through entities	0	(7)
Realized (gain) loss book/tax differences	2,534	725
Capital loss carryover	2,733	(1,551)
Net operating (income) loss - wholly-owned subsidiary	(22,631)	51
Dividend income from wholly-owned subsidiary	20,000	0
Non-deductible tax expense	732	217
Loss on extinguishment of debt	(682)	(682)
Non-deductible compensation	1,339	1,514
Compensation related book/tax differences	(4,503)	(7,823)
Interest on non-accrual loans	1,293	1,633
Other book/tax differences	15	173
Estimated distributable income before deductions for distributions	48,423	$ 23,820
Capital loss carryforwards	$ 136,400