Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,281,124	$ 1,185,524	$ 1,532,186
Cost of sales	606,957	588,027	771,470
Gross profit	674,167	597,497	760,716
Operating expenses
Research and development	347,647	375,139	366,444
Selling, general and administrative	131,115	126,502	131,811
Restructuring costs	21,925	0	0
Gain on sale of assets	0	(4,913)	0
Total operating expenses	500,687	496,728	498,255
Income from operations	173,480	100,769	262,461
Interest income	10,458	8,017	4,762
Interest expense	(1,057)	(1,057)	(1,153)
U.K. pension settlement	0	(13,768)	0
Other expense	(1,615)	(217)	(971)
Income before income taxes	181,266	93,744	265,099
Provision for income taxes	21,768	3,753	103,104
Net income	$ 159,498	$ 89,991	$ 161,995
Basic earnings per share (in dollars per share)	$ 2.74	$ 1.50	$ 2.55
Diluted earnings per share (in dollars per share)	$ 2.64	$ 1.46	$ 2.46
Basic weighted average common shares outstanding (in shares)	58,317	60,116	63,407
Diluted weighted average common shares outstanding (in shares)	60,462	61,583	65,951