Consolidated Condensed Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Consolidated Condensed Statements Of Comprehensive Income [Abstract]
Net sales	$ 218,883	$ 310,133	$ 564,679	$ 602,913
Cost of sales	115,034	152,083	281,884	291,336
Gross profit	103,849	158,050	282,795	311,577
Operating expenses
Research and development	32,426	29,608	90,678	83,986
Selling, general and administrative	18,625	19,021	57,038	57,274
Patent infringement settlements, net	0	0	695	0
Restructuring and other, net	12	3,292	(572)	3,292
Total operating expenses	51,063	51,921	147,839	144,552
Income from operations	52,786	106,129	134,956	167,025
Interest income, net	222	76	581	334
Other expense, net	(45)	(31)	(100)	(94)
Income before income taxes	52,963	106,174	135,437	167,265
Provision for income taxes	11,463	38,312	39,928	57,027
Net income	41,500	67,862	95,509	110,238
Change in unrealized gain (loss) on marketable securities, net of tax	(42)	(30)	151	(11)
Comprehensive income	$ 41,458	$ 67,832	$ 95,660	$ 110,227
Basic earnings per share	$ 0.66	$ 1.04	$ 1.51	$ 1.70
Diluted earnings per share	$ 0.63	$ 0.99	$ 1.45	$ 1.60
Basic weighted average common shares outstanding	62,854	65,055	63,170	64,859
Diluted weighted average common shares outstanding	65,368	68,866	65,894	68,946