REVENUE AND MAJOR CUSTOMERS (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($) Customer	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($) Customer	Mar. 31, 2016 Customer
Revenue from External Customer [Line Items]
Net revenues	$ 232,933	$ 225,735	$ 672,222	$ 647,110
US [Member]
Revenue from External Customer [Line Items]
Net revenues	123,719	122,075	371,019	363,456
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues	63,233	62,292	168,722	164,117
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues	27,164	27,506	81,979	82,240
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues	18,817	13,862	50,502	37,297
Total international net revenues [Member]
Revenue from External Customer [Line Items]
Net revenues	109,214	103,660	301,203	283,654
Enterprise [Member]
Revenue from External Customer [Line Items]
Net revenues	157,345	158,251	467,784	470,476
Consumer [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 75,588	$ 67,484	$ 204,438	$ 176,634
Net Revenues [Member] | Customer Concentration Risk [Member]
Revenue from External Customer [Line Items]
Number of major customers, ten percent or greater, net revenues | Customer	1	0	1	0
Net Revenues [Member] | Customer Concentration Risk [Member] | Ingram Micro [Member]
Revenue from External Customer [Line Items]
Concentration risk percentage	10.50%		10.60%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ingram Micro [Member]
Revenue from External Customer [Line Items]
Number of major customers, ten percent or greater, net accounts receivable | Customer	1		1
Concentration risk percentage			11.90%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Synnex Corp. [Member]
Revenue from External Customer [Line Items]
Number of major customers, ten percent or greater, net accounts receivable | Customer					1
Concentration risk percentage					11.20%