REVENUE AND MAJOR CUSTOMERS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011 customers	Dec. 31, 2010 customers	Dec. 31, 2011 customers	Dec. 31, 2010 customers	Mar. 31, 2011 customers
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers, international	$ 84,166	$ 77,286	$ 235,227	$ 206,134
Net revenues	183,236	181,585	535,784	510,525
Number of Major Customers, Ten Percent Or Greater, Net Revenues	0	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 from unaffiliated customers, U.S.	99,070	104,299	300,557	304,391
Europe, Middle East and Africa [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers, international	50,831	46,506	137,589	121,587
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers, international	19,393	16,499	58,623	47,404
Americas, excluding U.S. [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers, international	13,942	14,281	39,015	37,143
Office and Contact Center [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers	133,335	122,949	400,729	358,480
Mobile [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers	36,024	43,208	96,529	109,446
Gaming and Computer Audio [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers	9,209	10,544	24,985	28,048
Clarity [Member]
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers	$ 4,668	$ 4,884	$ 13,541	$ 14,551