Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

		2018		2017
Land	$	10,170	$	10,635
Building and improvements		84,980		87,111
Machinery and equipment		151,180		153,312
Construction in progress		7,907		4,932
Property, Plant and Equipment, at cost		254,237		255,990
Less accumulated depreciation		(170,314)		(169,286)
Total Property, Plant and Equipment, net	$	83,923	$	86,704