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Inventories (Notes)
12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Inventories
The following table summarizes the components of inventory:
 
December 31,
 
2016
 
2015
Raw materials and supplies
$
65,719

 
$
76,680

Work in process
31,576

 
33,721

Finished goods
72,388

 
88,901

Total inventories, net
$
169,683

 
$
199,302


The allowance for excess and obsolete inventory balance at December 31, 2016 and 2015 was $10,069 and $11,269, respectively.