Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Income Statement [Abstract]
Net revenues	$ 460,907	$ 484,538	$ 558,608
Cost of revenues	150,800	159,180	177,704
Gross profit	310,107	325,358	380,904
Operating expenses:
Engineering and development	147,010	156,097	138,768
Sales and marketing	68,367	78,512	77,370
General and administrative	32,097	32,899	35,299
Special charges	74,853
Total operating expenses	322,327	267,508	251,437
Operating income (loss)	(12,220)	57,850	129,467
Interest and other income, net	3,260	4,007	3,959
Income (loss) from continuing operations before income taxes	(8,960)	61,857	133,426
Income tax expense (benefit)	9,306	(11,704)	13,983
Income (loss) from continuing operations	(18,266)	73,561	119,443
Discontinued operations:
Income (loss) from operations, net of income taxes		(425)	910
Gain on sale, net of income taxes			109,083
Income (loss) from discontinued operations		(425)	109,993
Net income (loss)	$ (18,266)	$ 73,136	$ 229,436
Income (loss) from continuing operations per share:
Basic	$ (0.21)	$ 0.79	$ 1.17
Diluted	$ (0.21)	$ 0.78	$ 1.16
Income (loss) from discontinued operations per share:
Basic		$ (0.01)	$ 1.08
Diluted			$ 1.07
Net income (loss) per share:
Basic	$ (0.21)	$ 0.78	$ 2.25
Diluted	$ (0.21)	$ 0.78	$ 2.23
Number of shares used in per share calculations:
Basic	87,612	93,560	101,766
Diluted	87,612	93,998	102,711