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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 | 12 Months Ended | ||
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Mar. 31, 2013
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Mar. 31, 2012
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Dec. 31, 2012
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Dec. 31, 2011
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Commodity contracts [Member] | Non Designated Derivative Instruments [Member] | Cost of goods sold [Member]
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| Classification and amounts of the Company's derivatives not designated as hedging instruments | ||||
| Realized Gains (Losses) | $ (73) | $ (102) | $ 720 | $ 338 |
| Unrealized Gains | $ 68 | $ 236 | $ 279 | $ (242) |
| X | ||||||||||
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- Definition
The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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- Definition
The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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