Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment consists of the following:

	March 31, 2018			December 30, 2017
Land and improvements	$	7,886		$	7,886
Buildings and improvements	63,226			62,852
Machinery and equipment	189,980			188,971
Assets under construction	1,811			2,443
	262,903			262,152
Accumulated depreciation	(171,381		)	(168,367		)
Property, plant and equipment, net	$	91,522		$	93,785