Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Consolidated Statements of Income
Revenues	$ 697,626	$ 644,826	$ 620,704
Cost of revenues	276,122	264,056	242,153
Gross margin	421,504	380,770	378,551
Operating expenses:
Research and development	199,744	188,050	172,985
Selling, general and administrative	155,483	160,486	154,145
Operating expenses	355,227	348,536	327,130
Operating income	66,277	32,234	51,421
Other income (expense):
Interest income	1,291	730	1,007
Interest expense	(2,587)	(2,828)	(3,154)
Other, net	(485)	127	(234)
Income before income taxes	64,496	30,263	49,040
Provision for income taxes	3,002	677	11,019
Net income	$ 61,494	$ 29,586	$ 38,021
Earnings per share:
Basic (in dollars per share)	$ 1.47	$ 0.70	$ 0.88
Diluted (in dollars per share)	$ 1.45	$ 0.69	$ 0.87
Weighted-average common shares outstanding:
Basic (in shares)	41,713	42,309	42,970
Diluted (in shares)	42,376	42,945	43,793