SEGMENT AND GEOGRAPHIC INFORMATION - Total Revenue by Geography (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Total revenue	$ 103,599	$ 92,097	$ 211,451	$ 173,902
United States
Segment Reporting Information [Line Items]
Total revenue	79,337	66,853	165,355	129,625
Europe
Segment Reporting Information [Line Items]
Total revenue	11,005	12,654	20,051	21,593
Asia
Segment Reporting Information [Line Items]
Total revenue	4,672	6,850	11,389	10,753
Rest of the world
Segment Reporting Information [Line Items]
Total revenue	$ 8,585	$ 5,740	$ 14,656	$ 11,931