REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012
Revenue from External Customer [Line Items]
Net revenues, international	$ 85,555	$ 84,166	$ 234,609	$ 235,227
Net revenues	197,402	183,236	558,047	535,784
Number of Major Customers, Ten Percent Or Greater, Net Revenues	1	0	0	0
Number of Major Customers, Ten Percent Or Greater, Net Accounts Receivable	0		0		0
U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues, U.S.	111,847	99,070	323,438	300,557
Europe and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues, international	51,095	49,825	131,622	134,349
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues, international	20,637	20,399	64,055	61,863
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues, international	13,823	13,942	38,932	39,015
Office and Contact Center [Member]
Revenue from External Customer [Line Items]
Net revenues	139,449	133,335	406,601	400,729
Mobile [Member]
Revenue from External Customer [Line Items]
Net revenues	44,138	36,024	113,600	96,529
Gaming and Computer Audio [Member]
Revenue from External Customer [Line Items]
Net revenues	9,024	9,209	23,610	24,985
Clarity [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 4,791	$ 4,668	$ 14,236	$ 13,541