Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Consolidated Statements of Income
Revenues	$ 644,826	$ 620,704	$ 580,087
Cost of revenues	264,056	242,153	227,183
Gross margin	380,770	378,551	352,904
Operating expenses:
Research and development	188,050	172,985	157,799
Selling, general and administrative	160,486	154,145	130,795
Operating expenses	348,536	327,130	288,594
Operating income	32,234	51,421	64,310
Other income (expense):
Interest income	730	1,007	853
Interest expense	(2,828)	(3,154)	(3,293)
Other income (expense), net	127	(234)	157
Income before income taxes	30,263	49,040	62,027
Provision for income taxes	677	11,019	12,208
Net income	$ 29,586	$ 38,021	$ 49,819
Earnings per share:
Basic (in dollars per share)	$ 0.70	$ 0.88	$ 1.17
Diluted (in dollars per share)	$ 0.69	$ 0.87	$ 1.14
Weighted-average common shares outstanding:
Basic (in shares)	42,309	42,970	42,715
Diluted (in shares)	42,945	43,793	43,537