Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 25, 2017
Income Statement [Abstract]
Net sales	$ 1,185,524	$ 1,532,186	$ 1,538,940
Cost of sales	588,027	771,470	781,125
Gross profit	597,497	760,716	757,815
Operating expenses
Research and development	375,139	366,444	303,658
Selling, general and administrative	126,502	131,811	127,265
Gain on sale of assets	(4,913)	0	0
Asset impairment	0	0	9,842
Total operating expenses	496,728	498,255	440,765
Income from operations	100,769	262,461	317,050
Interest income	8,017	4,762	1,676
Interest expense	(1,057)	(1,153)	(3,600)
U.K. pension settlement	(13,768)	0	0
Other expense	(217)	(971)	(79)
Income before income taxes	93,744	265,099	315,047
Provision for income taxes	3,753	103,104	53,838
Net income	$ 89,991	$ 161,995	$ 261,209
Basic earnings per share (in dollars per share)	$ 1.50	$ 2.55	$ 4.12
Diluted earnings per share (in dollars per share)	$ 1.46	$ 2.46	$ 3.92
Basic weighted average common shares outstanding (in shares)	60,116	63,407	63,329
Diluted weighted average common shares outstanding (in shares)	61,583	65,951	66,561