Consolidated Condensed Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 24, 2016	Dec. 26, 2015	Dec. 24, 2016	Dec. 26, 2015
Consolidated Condensed Statements of Income [Abstract]
Net sales	$ 523,029	$ 347,863	$ 1,211,076	$ 937,252
Cost of sales	267,877	182,952	617,540	497,666
Gross profit	255,152	164,911	593,536	439,586
Operating expenses:
Research and development	76,079	70,290	225,686	203,383
Selling, general and administrative	32,884	30,632	95,513	89,854
Patent agreement and other		78		(11,670)
Total operating expenses	108,963	101,000	321,199	281,567
Income from operations	146,189	63,911	272,337	158,019
Interest income	415	165	978	634
Interest expense	(765)	(863)	(3,020)	(2,786)
Other expense	(47)	(818)	(161)	(991)
Income before income taxes	145,792	62,395	270,134	154,876
Provision for income taxes	23,751	21,011	43,983	45,258
Net income	$ 122,041	$ 41,384	$ 226,151	$ 109,618
Basic earnings per share	$ 1.91	$ 0.65	$ 3.59	$ 1.73
Diluted earnings per share	$ 1.83	$ 0.63	$ 3.41	$ 1.66
Basic weighted average common shares outstanding	63,837	63,328	63,025	63,316
Diluted weighted average common shares outstanding	66,748	65,761	66,378	66,184