Segment Information (Consolidated Net Sales And Long Lived Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 254,219	$ 233,292	$ 753,182	$ 685,914
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	108,355	95,147	324,689	273,433
Long-lived Assets	95,455		95,455		$ 92,835
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	34,352	$ 37,325	101,245	$ 107,112
Long-lived Assets	$ 64,415		$ 64,415		$ 57,797