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Inventories (Tables)
3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
The following table summarizes the components of inventory:
 
March 31,
2016
 
December 31,
2015
Raw materials and supplies
$
74,428

 
$
76,680

Work in process
33,096

 
33,721

Finished goods
96,342

 
88,901

Total inventories, net
$
203,866

 
$
199,302