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4. INVENTORIES
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
4. INVENTORIES

Inventories consisted primarily of bulk ethanol, corn, co-products and unleaded fuel, and are valued at the lower-of-cost-or-market, with cost determined on a first-in, first-out basis. Inventory balances consisted of the following (in thousands):

 

   September 30, 2015   December 31, 2014 
Finished goods  $31,554   $11,118 
Raw materials   8,213    2,695 
Work in progress   7,055    3,274 
Other   1,416    1,463 
Total  $48,238   $18,550