Segment Information (Schedule Of Revenues From External Customers By Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	$ 291,998	$ 255,323
Greater China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	157,808	131,738
Southeast Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	56,228	50,406
North Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	18,084	12,956
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	232,120	195,100
Americas And Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales to External Customers	$ 59,878	$ 60,223