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 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales $ 257,063 $ 258,514 $ 512,386 $ 498,963  
China [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 120,831 115,835 236,288 216,334  
Long-lived assets 93,289   93,289   $ 91,909
United States [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 28,870 $ 32,191 59,036 $ 66,893  
Long-lived assets $ 63,747   $ 63,747   $ 63,654