Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Revenue
Product	$ 158,631	$ 83,464	$ 345,142	$ 237,834
Service	10,725	7,324	23,945	20,356
Total revenue	169,356	90,788	369,087	258,190
Cost of revenue
Product	37,825	18,132	77,689	52,506
Service	6,502	3,216	13,512	9,415
Total cost of revenue	44,327	21,348	91,201	61,921
Gross margin
Product	120,806	65,332	267,453	185,328
Service	4,223	4,108	10,433	10,941
Total gross margin	125,029	69,440	277,886	196,269
Research, development, and engineering expenses	18,542	12,184	44,666	35,392
Selling, general, and administrative expenses	47,059	33,877	120,627	99,344
Operating income	59,428	23,379	112,593	61,533
Foreign currency gain (loss)	716	(442)	510	(303)
Investment income	776	937	2,364	2,103
Other income (expense)	202	(166)	(146)	(306)
Income before income tax expense	61,122	23,708	115,321	63,027
Income tax expense	10,722	2,981	20,467	9,897
Net income	$ 50,400	$ 20,727	$ 94,854	$ 53,130
Earnings per weighted-average common and common-equivalent share:
Basic (in dollars per share)	$ 0.58	$ 0.24	$ 1.09	$ 0.61
Diluted (in dollars per share)	$ 0.57	$ 0.23	$ 1.06	$ 0.59
Weighted-average common and common-equivalent shares outstanding:
Basic (in shares)	86,963	87,339	86,875	87,578
Diluted (in shares)	89,167	89,359	89,145	89,450