REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013 Customer	Jun. 30, 2012 Customer	Mar. 31, 2013 Customer
Revenue from External Customer [Line Items]
Total net revenues	$ 202,818	$ 181,365
Number of Major Customers, Ten Percent Or Greater, Net Revenues	1	0
Number of Major Customers, Ten Percent Or Greater, Net Accounts Receivable	1		1
Concentration, net revenues	10.50%
Concentration, accounts receivable	12.30%		10.30%
US
Revenue from External Customer [Line Items]
Net revenues	121,318	104,078
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues	44,385	41,576
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues	23,880	23,579
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues	13,235	12,132
Total international net revenues
Revenue from External Customer [Line Items]
Net revenues	81,500	77,287
Office and Contact Center [Member]
Revenue from External Customer [Line Items]
Net revenues	151,183	134,033
Mobile [Member]
Revenue from External Customer [Line Items]
Net revenues	41,624	36,157
Gaming and Computer Audio [Member]
Revenue from External Customer [Line Items]
Net revenues	6,451	6,789
Clarity [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 3,560	$ 4,386