CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Income Statement [Abstract]
Revenues	$ 228,516	$ 196,713
Cost of revenues	91,909	86,675
Gross profit	136,607	110,038
Operating expenses:
Research and development	52,234	48,449
Selling, general and administrative	42,995	41,942
Total operating expenses	95,229	90,391
Operating income	41,378	19,647
Other-than-temporary impairment loss on investment	(2,000)	0
Interest expense	(7,185)	(6,897)
Interest income and other, net	1,671	2,982
Income before income taxes	33,864	15,732
Benefit from (provision for) income taxes	(3,144)	982
Net income	$ 30,720	$ 16,714
Net income per share:
Basic (in dollars per share)	$ 0.24	$ 0.13
Diluted (in dollars per share)	$ 0.23	$ 0.12
Weighted average shares:
Basic (in shares)	129,560	133,302
Diluted (in shares)	132,806	136,642