BORROWINGS - Notes (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
January 2026 Notes | Notes
Debt Instrument [Line Items]
Interest expense	$ 0	$ 1,575
Amortization of deferred financing costs	0	84
Total interest and amortization of deferred financing costs	$ 0	$ 1,659
Weighted average interest rate	0.00%	4.46%
Average borrowings	$ 0	$ 140,000
October 2026 Notes | Notes
Debt Instrument [Line Items]
Interest expense	1,266	1,266
Amortization of deferred financing costs	192	192
Total interest and amortization of deferred financing costs	$ 1,458	$ 1,458
Weighted average interest rate	3.50%	3.50%
Average borrowings	$ 150,000	$ 150,000
August 2028 Notes | Notes
Debt Instrument [Line Items]
Interest expense	1,393	1,393
Amortization of deferred financing costs	126	127
Total interest and amortization of deferred financing costs	$ 1,519	$ 1,520
Weighted average interest rate	7.75%	7.75%
Average borrowings	$ 71,875	$ 71,875
2029 Convertible Notes | Convertible Debt
Debt Instrument [Line Items]
Interest expense	2,947	0
Amortization of deferred financing costs	370	0
Total interest and amortization of deferred financing costs	$ 3,317	$ 0
Weighted average interest rate	5.13%	0.00%
Average borrowings	$ 230,000	$ 0