Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Consolidated Net Sales And Long Lived Assets) (Details)

v3.7.0.1
Segment Information (Consolidated Net Sales And Long Lived Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales $ 255,323 $ 240,449  
China [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 115,457 100,499  
Long-lived assets 92,178   $ 91,909
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 30,166 $ 34,702  
Long-lived assets $ 63,952   $ 63,654