REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013 Customer	Dec. 31, 2012 Customer	Dec. 31, 2013 Customer	Dec. 31, 2012 Customer	Mar. 31, 2013 Customer
Revenue from External Customer [Line Items]
Total net revenues	$ 212,739	$ 197,402	$ 609,537	$ 558,047
Number of major customers, ten percent or greater, net revenues	0	1	0	0
Number of major customers, ten percent or greater, net accounts receivable	1		1		1
Concentration, accounts receivable	10.50%		10.50%		10.30%
Net revenues [Member] | Customer Concentration Risk [Member] | Ingram Micro [Member]
Revenue from External Customer [Line Items]
Concentration, net revenues		10.00%
US [Member]
Revenue from External Customer [Line Items]
Net revenues	113,042	111,847	350,155	323,438
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues	58,997	51,095	146,476	131,622
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues	25,917	20,637	73,077	64,055
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues	14,783	13,823	39,829	38,932
Total international net revenues
Revenue from External Customer [Line Items]
Net revenues	99,697	85,555	259,382	234,609
Office and Contact Center [Member]
Revenue from External Customer [Line Items]
Net revenues	146,636	139,449	437,764	406,601
Mobile [Member]
Revenue from External Customer [Line Items]
Net revenues	52,804	44,138	137,113	113,600
Gaming and Computer Audio [Member]
Revenue from External Customer [Line Items]
Net revenues	9,360	9,024	23,967	23,610
Clarity [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 3,939	$ 4,791	$ 10,693	$ 14,236