Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Net revenues	$ 619,503	$ 579,209	$ 1,234,949	$ 1,154,190
Cost of revenues	184,786	175,875	376,881	344,172
Gross margin	434,717	403,334	858,068	810,018
Operating expenses:
Research and development	157,985	141,814	311,036	277,939
Selling, general and administrative	91,053	83,463	180,228	166,573
Amortization of acquisition-related intangibles	510	1,244	1,215	2,488
Total operating expenses	249,548	226,521	492,479	447,000
Operating income	185,169	176,813	365,589	363,018
Interest and other income (expense), net	(1,831)	1,151	(3,669)	5,738
Income before income taxes	187,000	175,662	369,258	357,280
Provision for income taxes	19,468	11,470	34,481	30,039
Net income	$ 167,532	$ 164,192	$ 334,777	$ 327,241
Net income per common share:
Basic (in dollars per share)	$ 0.68	$ 0.65	$ 1.35	$ 1.29
Diluted (in dollars per share)	0.65	0.61	1.28	1.22
Cash dividends per common share	$ 0.35	$ 0.33	$ 0.70	$ 0.66
Shares used in per share calculations:
Basic (in shares)	248,094	253,466	247,960	253,056
Diluted (in shares)	258,217	270,373	261,739	267,885