INCOME TAXES - Summary of Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Accrued expenses	$ 5,060	$ 4,359
Deferred revenue	14,420	11,278
Reserves	3,216	5,463
Pension and other retiree benefits	5,078	5,960
Net operating loss carryforwards	12,443	14,992
Tax credit carryforwards	14,138	9,043
Share-based compensation	4,534	5,505
Operating lease liability	18,213
Other	20	166
Total gross deferred tax assets	77,122	56,766
Valuation allowance	(5,641)	(835)
Net deferred tax assets	71,481	55,931
Deferred tax liabilities:
Intangible assets	(146,950)	(164,199)
Other deferred liabilities	(8,061)	(1,609)
Operating lease right-of-use asset	(15,152)
Depreciation	(9,492)	(7,134)
Total deferred tax liability	$ (108,174)	$ (117,011)