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Inventories (Notes)
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Inventories
Inventories are stated at the lower of cost or market with cost being determined by the first-in, first-out (“FIFO”) method. The components of inventory are as follows:
 
June 30,
2013
 
December 31,
2012
Raw materials and supplies
$
86,908

 
$
85,726

Work in process
46,067

 
40,945

Finished goods
78,718

 
69,830

Total inventories, net
$
211,693

 
$
196,501

The allowance for excess and obsolete inventory balance at June 30, 2013 and December 31, 2012 was $5,568 and $4,078, respectively.