Quarterly report pursuant to sections 13 or 15(d)

4. DERIVATIVES (Details)

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4. DERIVATIVES (Details) (Commodity contracts [Member], Non Designated Derivative Instruments [Member], Cost of goods sold [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Commodity contracts [Member] | Non Designated Derivative Instruments [Member] | Cost of goods sold [Member]
       
Classification and amounts of the Company's derivatives not designated as hedging instruments        
Realized Gains (Losses) $ (440) $ 483 $ 277 $ 460
Unrealized Gains $ 388 $ (88) $ (479) $ (126)