Consolidated Condensed Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Consolidated Condensed Statements of Income [Abstract]
Net sales	$ 298,606	$ 218,883	$ 661,385	$ 564,679
Cost of sales	167,775	115,034	354,612	281,884
Gross profit	130,831	103,849	306,773	282,795
Operating expenses:
Research and development	55,474	32,426	139,808	90,678
Selling, general and administrative	27,783	18,625	69,011	57,038
Acquisition related costs	3,200		18,137
Restructuring and other		12	1,455	(572)
Patent infringement settlements, net				695
Total operating expenses	86,457	51,063	228,411	147,839
Income from operations	44,374	52,786	78,362	134,956
Interest income	89	222	419	581
Interest expense	(1,131)		(4,598)
Other expense	(1,071)	(45)	(12,564)	(100)
Income before income taxes	42,261	52,963	61,619	135,437
Provision for income taxes	19,532	11,463	27,790	39,928
Net income	$ 22,729	$ 41,500	$ 33,829	$ 95,509
Basic earnings per share	$ 0.36	$ 0.66	$ 0.54	$ 1.51
Diluted earnings per share	$ 0.35	$ 0.63	$ 0.52	$ 1.45
Basic weighted average common shares outstanding	62,885	62,854	62,386	63,170
Diluted weighted average common shares outstanding	65,214	65,368	65,024	65,894