Stockholders' Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	$ 378,114	$ 265,858	$ 888,129	$ 745,792
Cost of revenue	264,620	188,666	627,093	521,147
Research and development	24,529	19,537	65,412	57,183
Sales and marketing	39,794	33,491	107,209	103,887
General and administrative	16,467	11,887	45,082	35,467
Total before tax	31,749	12,301	37,324	28,946
Tax impact	(6,214)	228	(9,979)	(2,735)
Net income	25,535	12,529	27,345	26,211
Amount Reclassified from AOCI
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	(1,614)	548	(595)	1,634
Cost of revenue	3	(2)	2	(10)
Research and development	27	(2)	32	(47)
Sales and marketing	167	(42)	95	(209)
General and administrative	24	(7)	10	(30)
Total before tax	(1,393)	495	(456)	1,338
Tax impact	293	(104)	96	(281)
Net income	$ (1,100)	$ 391	$ (360)	$ 1,057