INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS - Narrative (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 8,842,000	$ 6,175,000	$ 5,033,000
Fully amortized intangible asset written off	11,300,000
Capitalized contract cost, amortization	19,500,000	14,200,000
Capitalized contract cost, impairment loss	$ 0	$ 0
Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period	4 years 10 months 24 days
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period	5 years 9 months 18 days
Trade names and domains
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period	1 month 6 days