CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 02, 2017	Apr. 03, 2016	Mar. 29, 2015
Income Statement [Abstract]
Revenues	$ 728,243	$ 697,376	$ 572,905
Cost of revenues	307,605	275,722	227,601
Gross profit	420,638	421,654	345,304
Operating expenses:
Research and development	165,104	148,507	127,688
Selling, general and administrative	145,193	136,508	106,469
Total operating expenses	310,297	285,015	234,157
Operating income	110,341	136,639	111,147
Interest expense	(16,878)	(7,043)	(27)
Interest income and other, net	5,822	4,268	4,818
Income before income taxes from continuing operations	99,285	133,864	115,938
Income tax expense (benefit)	(9,899)	(61,435)	1,357
Net income from continuing operations	109,184	195,299	114,581
Discontinued operations:
Gain from divestiture	1,385	0	16,840
Loss from discontinued operations before income taxes	0	(547)	(37,237)
Income tax expense	87	15	275
Net income (loss) from discontinued operations	1,298	(562)	(20,672)
Net income	$ 110,482	$ 194,737	$ 93,909
Basic net income per share - continuing operations (in dollars per share)	$ 0.82	$ 1.37	$ 0.77
Basic net income (loss) per share - discontinued operations (in dollars per share)	0.01	0.00	(0.14)
Basic net income per share (in dollars per share)	0.83	1.37	0.63
Diluted net income per share - continuing operations (in dollars per share)	0.79	1.32	0.74
Diluted net income (loss) per share - discontinued operations (in dollars per share)	0.01	0.00	(0.13)
Diluted net income per share (in dollars per share)	$ 0.80	$ 1.32	$ 0.61
Weighted average shares:
Basic (shares)	133,817	142,783	148,714
Diluted (shares)	137,440	147,652	153,983