Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 29, 2013	Dec. 30, 2012
Income Statement [Abstract]
Net revenues	$ 119,449	$ 119,386	$ 345,187	$ 367,624
Cost of revenues	38,446	39,089	111,378	121,382
Gross profit	81,003	80,297	233,809	246,242
Operating expenses:
Engineering and development	35,235	38,409	110,412	115,891
Sales and marketing	16,113	19,325	51,957	57,950
General and administrative	7,406	8,139	22,698	24,951
Special charges	1,947		18,329
Total operating expenses	60,701	65,873	203,396	198,792
Operating income	20,302	14,424	30,413	47,450
Interest and other income, net	970	903	1,768	2,935
Income from continuing operations before income taxes	21,272	15,327	32,181	50,385
Income taxes	686	1,622	3,668	6,459
Income from continuing operations	20,586	13,705	28,513	43,926
Loss from discontinued operations, net of income taxes		(464)		(425)
Net income	$ 20,586	$ 13,241	$ 28,513	$ 43,501
Income from continuing operations per share:
Basic	$ 0.24	$ 0.15	$ 0.32	$ 0.46
Diluted	$ 0.24	$ 0.15	$ 0.32	$ 0.46
Loss from discontinued operations per share:
Basic		$ (0.01)
Diluted		$ (0.01)
Net income per share:
Basic	$ 0.24	$ 0.14	$ 0.32	$ 0.46
Diluted	$ 0.24	$ 0.14	$ 0.32	$ 0.46
Number of shares used in per share calculations:
Basic	86,855	92,386	87,810	94,518
Diluted	87,186	92,570	88,209	94,963