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Inventories (Notes)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Inventories
The following table summarizes the components of inventory:
 
June 30,
2014
 
December 31,
2013
Raw materials and supplies
$
95,021

 
$
93,014

Work in process
43,078

 
42,996

Finished goods
88,857

 
76,994

Total inventories, net
$
226,956

 
$
213,004


The allowance for excess and obsolete inventory was $5,595 and $6,556 at June 30, 2014 and December 31, 2013, respectively.