Quarterly report pursuant to sections 13 or 15(d)

4. DERIVATIVES (Details)

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4. DERIVATIVES (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Classification and amounts of the Company's derivatives not designated as hedging instruments        
Unrealized Gains     $ (255) $ 61
Non Designated Derivative Instruments [Member]
       
Classification and amounts of the Company's derivatives not designated as hedging instruments        
Realized Gains (Losses) 265 (36) 163 (23)
Unrealized Gains (145) (53) 91 (38)
Non Designated Derivative Instruments [Member] | Commodity contracts [Member] | Cost of goods sold [Member]
       
Classification and amounts of the Company's derivatives not designated as hedging instruments        
Realized Gains (Losses) 265 (36) 163 (23)
Unrealized Gains $ (145) $ (53) $ 91 $ (38)