REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012
Revenue from External Customer [Line Items]
Net revenues, international	$ 77,287	$ 75,309
Net revenues	181,365	175,600
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
U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues, U.S.	104,078	100,291
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues, international	41,576	42,141
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues, international	23,579	20,258
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues, international	12,132	12,910
Office and Contact Center [Member]
Revenue from External Customer [Line Items]
Net revenues	134,033	130,999
Mobile [Member]
Revenue from External Customer [Line Items]
Net revenues	36,157	32,164
Gaming and Computer Audio [Member]
Revenue from External Customer [Line Items]
Net revenues	6,789	7,395
Clarity [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 4,386	$ 5,042