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Inventories (Notes)
3 Months Ended
Mar. 31, 2014
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Inventories
The following table summarizes the components of inventory:
 
March 31,
2014
 
December 31,
2013
Raw materials and supplies
$
95,208

 
$
93,014

Work in process
47,123

 
42,996

Finished goods
81,664

 
76,994

Total inventories, net
$
223,995

 
$
213,004


The allowance for excess and obsolete inventory balance at March 31, 2014 and December 31, 2013 was $6,168 and $6,556, respectively.