Stockholders' Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	$ 308,811	$ 280,052	$ 626,736	$ 510,015
Cost of revenue	215,455	198,751	422,439	362,473
Research and development	22,586	21,144	46,415	40,883
Sales and marketing	35,740	34,384	73,555	67,415
General and administrative	15,623	15,481	31,028	28,615
Total before tax	22,203	9,230	52,978	5,575
Tax impact	(4,369)	(3,247)	(12,184)	(3,765)
Net income	17,834	5,983	40,794	1,810
Amount Reclassified from AOCI
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	(489)	343	(952)	1,019
Cost of revenue	1	1	1	(1)
Research and development	32	7	44	5
Sales and marketing	51	5	77	(72)
General and administrative	10	(1)	17	(14)
Total before tax	(395)	355	(813)	937
Tax impact	83	(75)	171	(197)
Net income	$ (312)	$ 280	$ (642)	$ 740