SEGMENT AND GEOGRAPHIC INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			1
Total revenue	$ 216,421	$ 223,797	$ 402,445	$ 428,908
United States
Segment Reporting Information [Line Items]
Total revenue	139,544	136,752	246,647	263,998
Europe
Segment Reporting Information [Line Items]
Total revenue	33,901	33,450	65,210	64,471
Asia
Segment Reporting Information [Line Items]
Total revenue	13,138	18,198	25,690	36,098
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 29,838	$ 35,397	$ 64,898	$ 64,341