REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014 Customer	Sep. 30, 2013	Sep. 30, 2014 Customer	Sep. 30, 2013	Mar. 31, 2014 Customer
Revenue from External Customer [Line Items]
Net revenues	$ 215,805	$ 193,980	$ 432,467	$ 396,798
Number of major customers, ten percent or greater, net revenues	0		0
Number of major customers, ten percent or greater, net accounts receivable	0		0		0
Ingram Micro [Member]
Revenue from External Customer [Line Items]
Number of major customers, ten percent or greater, net revenues		1		1
Net revenues [Member] | Customer Concentration Risk [Member] | Ingram Micro [Member]
Revenue from External Customer [Line Items]
Concentration, net revenues		10.10%		10.30%
US [Member]
Revenue from External Customer [Line Items]
Net revenues	123,697	115,795	248,164	237,113
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues	49,558	43,094	100,820	87,479
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues	28,264	23,280	55,233	47,160
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues	14,286	11,811	28,250	25,046
Total international net revenues [Member]
Revenue from External Customer [Line Items]
Net revenues	92,108	78,185	184,303	159,685
Enterprise [Member]
Revenue from External Customer [Line Items]
Net revenues	156,680	139,945	309,033	291,128
Consumer [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 59,125	$ 54,035	$ 123,434	$ 105,670