CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 02, 2017	Jul. 03, 2016
Income Statement [Abstract]
Revenues	$ 196,713	$ 192,128
Cost of revenues	86,675	83,779
Gross profit	110,038	108,349
Operating expenses:
Research and development	48,449	49,648
Selling, general and administrative	41,942	38,816
Total operating expenses	90,391	88,464
Operating income	19,647	19,885
Interest expense	(6,897)	(4,148)
Interest income and other, net	2,982	1,652
Income before income taxes	15,732	17,389
Benefit from income taxes	(982)	(3,558)
Net income	$ 16,714	$ 20,947
Net income per share:
Basic (in dollars per share)	$ 0.13	$ 0.16
Diluted (in dollars per share)	$ 0.12	$ 0.15
Weighted average shares:
Basic (in shares)	133,302	133,934
Diluted (in shares)	136,642	138,109