BORROWINGS - Corporate Credit Facility and Special Purpose Vehicle Financing Credit Facility (Details) - Line of Credit - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Corporate Credit Facility
Line of Credit Facility [Line Items]
Weighted average interest rate	7.33%
Average borrowings	$ 269,800
Corporate Credit Facility | Corporate Credit Facility
Line of Credit Facility [Line Items]
Interest expense	13,655	$ 16,661	$ 11,156
Unused commitment and other fees	1,710	1,152	852
Amortization of deferred financing costs	2,262	1,813	1,144
Total interest and amortization of deferred financing costs	$ 17,627	$ 19,626	$ 13,152
Weighted average interest rate	7.33%	7.66%	5.22%
Average borrowings	$ 186,274	$ 217,500	$ 213,658
SPV Credit Facility | SPV Credit Facility
Line of Credit Facility [Line Items]
Interest expense	6,118	0	0
Unused commitment and other fees	1,165	45	0
Amortization of deferred financing costs	432	0	0
Total interest and amortization of deferred financing costs	$ 7,715	$ 45	$ 0
Weighted average interest rate	7.32%	0.00%	0.00%
Average borrowings	$ 83,534	$ 0	$ 0