Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 26, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net sales	$ 809,786	$ 426,843	$ 369,571
Cost of sales	414,595	196,402	167,576
Gross margin	395,191	230,441	201,995
Operating expenses:
Research and development	114,071	85,697	63,934
Selling, general and administrative	76,998	65,208	58,734
Patent agreement, net			(4,000)
Restructuring and other, net	3,292
Total operating expenses	194,361	150,905	118,668
Income from operations	200,830	79,536	83,327
Interest income, net	440	517	860
Other income (expense), net	(80)	(70)	27
Income before income taxes	201,190	79,983	84,214
Provision (benefit) for income taxes	64,592	(8,000)	(119,289)
Net income	136,598	87,983	203,503
Change in unrealized gain (loss) on marketable securities	(157)	(8)	(105)
Comprehensive income	$ 136,441	$ 87,975	$ 203,398
Basic earnings per share	$ 2.12	$ 1.35	$ 3.00
Diluted earnings per share	$ 2.00	$ 1.29	$ 2.82
Basic weighted average common shares outstanding	64,580	64,934	67,857
Diluted weighted average common shares outstanding	68,454	68,063	72,103