Quarterly report pursuant to Section 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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
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) $ 465 $ (29) $ 549 $ (102)
Unrealized Gains (Losses) $ (17) $ (450) $ (32) $ (382)