GOODWILL & INTANGIBLE ASSETS - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021 USD ($) reporting_unit	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Number of reporting units | reporting_unit	1
Goodwill	$ 1,717,554	$ 1,725,680	$ 1,715,485
Carrying value of intangible assets	511,866	582,179
Impairment of intangible assets	$ 0	0	$ 35,871
Weighted average useful life of acquired intangible assets	14 years 7 months 6 days
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 18,600	18,600
Distributor relationships and technology licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 4,500	$ 0
Distributor relationships and technology licenses | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	3 years
Distributor relationships and technology licenses | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	4 years
Developed and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	11 years 2 months 12 days
Customer and distributor relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	15 years 10 months 24 days
Trademarks and trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	8 years 7 months 6 days
Capitalized software
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets	3 years