RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($) plan	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 62	$ 2,674	$ 18,693
Number of restructuring plans | plan		2
Restructuring costs addition	$ 100
FY2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,700
VSP
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 100	$ 17,200
Employee-Related | FY2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 5,100
Employee-Related | Q2 FY20 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500
Employee-Related | Q4 FY20 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 2,100