INCOME TAXES - Schedule of Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Deferred tax assets:
Accrued expenses	$ 4,986	$ 6,074
Capitalized R&D expenses	71,205	40,909
Deferred revenue	21,482	24,112
Reserves	2,650	3,902
Pension and other retiree benefits	2,733	2,319
Net operating loss carryforwards	8,199	9,016
Tax credit carryforwards	29,109	21,512
Share-based compensation	8,233	7,338
Operating lease liability	12,292	14,020
Other deferred tax assets	0	35
Total gross deferred tax assets	160,889	129,237
Valuation allowance	(21,183)	(15,612)
Net deferred tax assets	139,706	113,625
Deferred tax liabilities:
Intangible assets	(86,170)	(104,245)
Operating lease right-of-use asset	(10,481)	(11,854)
Depreciation	(3,472)	(5,563)
Other deferred tax liabilities	(13,190)	(12,368)
Total deferred tax assets	$ 26,393
Total deferred tax liabilities		$ (20,405)