SEGMENT AND GEOGRAPHIC INFORMATION - Total Revenue by Geography (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total revenue	$ 122,833	$ 110,428	$ 334,284	$ 284,330
United States
Segment Reporting Information [Line Items]
Total revenue	88,905	86,747	254,260	216,364
Europe
Segment Reporting Information [Line Items]
Total revenue	16,981	12,313	37,032	33,906
Asia
Segment Reporting Information [Line Items]
Total revenue	8,075	4,035	19,464	14,788
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 8,872	$ 7,333	$ 23,528	$ 19,272