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Derivative Financial Instruments (Schedule Of Revenues And Cost Of Goods Sold) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2014
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Mar. 31, 2013
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Revenue [Member]
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| Trading Activity, Gains and Losses, Net [Line Items] | ||
| Net in revenue | $ 3,620 | $ 1,982 |
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Cost Of Goods Sold [Member]
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| Trading Activity, Gains and Losses, Net [Line Items] | ||
| Net in revenue | $ 4,744 | $ 1,962 |