SEGMENT AND GEOGRAPHIC INFORMATION - Summary of Total Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 225,756	$ 268,952
United States
Segment Reporting Information [Line Items]
Total revenue	138,618	169,308
Europe
Segment Reporting Information [Line Items]
Total revenue	35,448	42,057
Asia
Segment Reporting Information [Line Items]
Total revenue	19,527	26,449
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 32,163	$ 31,138