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Inventories (Notes)
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Inventories
The following table summarizes the components of inventory:
 
December 31,
 
2014
 
2013
Raw materials and supplies
$
94,437

 
$
93,014

Work in process
35,631

 
42,996

Finished goods
85,657

 
76,994

Total inventories, net
$
215,725

 
$
213,004


The allowance for excess and obsolete inventory balance at December 31, 2014 and 2013 was $5,233 and $6,556, respectively.