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Property, Plant and Equipment, Net (Tables)
 6 Months Ended
Jul. 01, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
Property, plant and equipment consists of the following:
 
July 1,
2017
 
December 31,
2016
Land and improvements
$
7,789

 
$
7,781

Buildings and improvements
61,913

 
62,055

Machinery and equipment
177,681

 
177,745

Assets under construction
8,282

 
2,386

 
255,665

 
249,967

Accumulated depreciation
(162,537
)
 
(157,160
)
Property, plant and equipment, net
$
93,128

 
$
92,807