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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
The following table summarizes the components of inventory:
 
September 30,
2015
 
December 31,
2014
Raw materials and supplies
$
80,663

 
$
94,437

Work in process
39,965

 
35,631

Finished goods
100,216

 
85,657

Total inventories, net
$
220,844

 
$
215,725