REVENUE AND MAJOR CUSTOMERS (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($) Customer	Dec. 31, 2014 USD ($) Customer	Dec. 31, 2015 USD ($) Customer	Dec. 31, 2014 USD ($) Customer	Mar. 31, 2015 Customer
Revenue from External Customer [Line Items]
Net revenues	$ 225,735	$ 231,781	$ 647,110	$ 664,248
Number of major customers, ten percent or greater, net revenues | Customer	0	0	0	0
Number of major customers, ten percent or greater, net accounts receivable | Customer	1		1
US [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 122,075	$ 123,092	$ 363,456	$ 371,256
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues	62,292	63,940	164,117	164,760
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues	27,506	28,778	82,240	84,011
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues	13,862	15,971	37,297	44,221
Total international net revenues [Member]
Revenue from External Customer [Line Items]
Net revenues	103,660	108,689	283,654	292,992
Enterprise [Member]
Revenue from External Customer [Line Items]
Net revenues	158,251	161,591	470,476	470,625
Consumer [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 67,484	$ 70,190	$ 176,634	$ 193,623
D&H Distributing [Member]
Revenue from External Customer [Line Items]
Number of major customers, ten percent or greater, net accounts receivable | Customer					1
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ingram Micro [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage			10.10%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | D&H Distributing [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage					11.10%