CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Income Statement [Abstract]
Net revenues	$ 113,116	$ 130,371
Cost of revenues	36,619	43,313
Gross profit	76,497	87,058
Operating expenses:
Engineering and development	40,387	39,458
Sales and marketing	19,413	18,886
General and administrative	7,739	8,673
Special charges	12,033
Total operating expenses	79,572	67,017
Operating income (loss)	(3,075)	20,041
Interest and other income, net	773	1,078
Income (loss) from continuing operations before income taxes	(2,302)	21,119
Income taxes	748	2,678
Income (loss) from continuing operations	(3,050)	18,441
Loss from discontinued operations, net of income taxes		(55)
Net income (loss)	$ (3,050)	$ 18,386
Income (loss) from continuing operations per share:
Basic	$ (0.03)	$ 0.19
Diluted	$ (0.03)	$ 0.19
Loss from discontinued operations per share:
Basic
Diluted
Net income (loss) per share:
Basic	$ (0.03)	$ 0.19
Diluted	$ (0.03)	$ 0.19
Number of shares used in per share calculations:
Basic	89,146	97,405
Diluted	89,146	98,369