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Inventories
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following:
 
 
September 30,
2014
 
December 31,
2013
Finished products
 
$
268,969

 
$
232,658

Feedstock, additives and chemicals
 
166,268

 
180,646

Materials and supplies
 
65,315

 
58,575

Inventories
 
$
500,552

 
$
471,879