Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 26, 2016	Mar. 28, 2015	Mar. 29, 2014
Consolidated Statements of Income [Abstract]
Net sales	$ 1,169,251	$ 916,568	$ 714,338
Cost of sales	614,411	490,820	358,175
Gross profit	554,840	425,748	356,163
Operating expenses:
Research and development	269,217	197,878	126,189
Selling, general and administrative	117,082	99,509	74,861
Acquisition related costs		18,137
Restructuring and other, net		1,455	(598)
Patent agreement and other	(11,670)		695
Total operating expenses	374,629	316,979	201,147
Income from operations	180,211	108,769	155,016
Interest income	877	579	848
Interest expense	(3,308)	(5,627)
Other expense	(1,791)	(12,172)	(127)
Income before income taxes	175,989	91,549	155,737
Provision for income taxes	52,359	36,371	47,626
Net income	$ 123,630	$ 55,178	$ 108,111
Basic earnings per share	$ 1.96	$ 0.88	$ 1.72
Diluted earnings per share	$ 1.87	$ 0.85	$ 1.65
Basic weighted average common shares outstanding	63,197	62,503	62,926
Diluted weighted average common shares outstanding	65,993	65,235	65,535