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Inventories
12 Months Ended
Dec. 31, 2011
Inventories [Abstract]  
Inventories

3. Inventories

Inventories consist of the following at December 31:

 

     2011      2010  

Finished products

   $ 234,830       $ 219,568   

Feedstock, additives, and chemicals

     207,899         189,007   

Materials and supplies

     48,048         41,453   
  

 

 

    

 

 

 

Inventories

   $ 490,777       $ 450,028