Consolidated Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Revenue	$ 279,883	$ 260,172	$ 472,418	$ 497,833
Cost of product revenue	100,686	138,891	214,981	253,929
Amortization of acquired intangible assets	1,185	3,111	1,470	6,188
Total cost of revenue	101,871	142,002	216,451	260,117
Gross profit	178,012	118,170	255,967	237,716
Research and development	36,557	35,650	73,316	70,919
Selling and marketing	49,062	56,409	85,656	95,245
General and administrative	21,856	20,592	46,429	43,499
Amortization of acquired intangible assets	254	269	508	540
Total operating expenses	107,729	112,920	205,909	210,203
Operating income	70,283	5,250	50,058	27,513
Other (expense) income, net	(384)	1,533	(403)	2,813
Income before income taxes	69,899	6,783	49,655	30,326
Income tax expense (benefit)	11,283	(424)	9,174	599
Net income	$ 58,616	$ 7,207	$ 40,481	$ 29,727
Basic	$ 2.10	$ 0.26	$ 1.44	$ 1.06
Diluted	$ 2.07	$ 0.25	$ 1.42	$ 1.03
Basic	27,923	28,079	28,110	27,970
Diluted	28,280	28,763	28,414	28,779