XML 54 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6
Major Customers and Suppliers (Tables)
12 Months Ended
Dec. 31, 2012
Major Customers and Suppliers  
Schedule of sales to major customers

 

 

 
  Year Ended December 31,  
 
  2012   2011   2010  

Petroleum

                   

Customer A

    10 %   15 %   14 %

Customer B

    9 %   12 %   11 %

Customer C

    8 %   9 %   10 %
               

 

    27 %   36 %   35 %
               

Nitrogen Fertilizer

                   

Customer D

    10 %   17 %   12 %

Customer E

    10 %   12 %   10 %
               

 

    20 %   29 %   22 %
               
Petroleum | Supplier concentration
 
Major Customers and Suppliers  
Schedule of purchases contracted as a percentage of the total cost of product sold (exclusive of depreciation and amortization)

 

 

 
  Year Ended December 31,  
 
  2012   2011   2010  

Petroleum

                   

Supplier A

    45 %   65 %   64 %
               
Nitrogen Fertilizer | Supplier concentration
 
Major Customers and Suppliers  
Schedule of purchases contracted as a percentage of the total cost of product sold (exclusive of depreciation and amortization)

 

 

 
  Year Ended December 31,  
 
  2012   2011   2010  

Nitrogen Fertilizer

                   

Supplier B

    5 %   5 %   5 %