CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 03, 2016	Mar. 29, 2015	Mar. 30, 2014
Income Statement [Abstract]
Revenues	$ 697,376	$ 572,905	$ 484,779
Cost of revenues	275,722	227,601	211,877
Gross profit	421,654	345,304	272,902
Operating expenses:
Research and development	148,507	127,688	140,799
Selling, general and administrative	136,508	106,469	101,148
Total operating expenses	285,015	234,157	241,947
Operating income	136,639	111,147	30,955
Gain on divestitures, net	0	0	78,632
Interest expense	(7,043)	(27)	(21)
Interest income and other, net	4,268	4,818	2,728
Income before income taxes from continuing operations	133,864	115,938	112,294
Income tax expense (benefit)	(61,435)	1,357	981
Net income from continuing operations	195,299	114,581	111,313
Discontinued operations:
Gain from divestiture	0	16,840	0
Loss from discontinued operations before income taxes	(547)	(37,237)	(22,938)
Income tax expense	15	275	11
Net loss from discontinued operations	(562)	(20,672)	(22,949)
Net income	$ 194,737	$ 93,909	$ 88,364
Basic net income per share - continuing operations (in dollars per share)	$ 1.37	$ 0.77	$ 0.74
Basic net loss per share - discontinued operations (in dollars per share)	0.00	(0.14)	(0.15)
Basic net income (loss) per share (in dollars per share)	1.37	0.63	0.59
Diluted net income per share - continuing operations (in dollars per share)	1.32	0.74	0.73
Diluted net loss per share - discontinued operations (in dollars per share)	0.00	(0.13)	(0.15)
Diluted net income (loss) per share (in dollars per share)	$ 1.32	$ 0.61	$ 0.58
Weighted average shares:
Basic (shares)	142,783	148,714	149,480
Diluted (shares)	147,652	153,983	153,369