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Financial Instruments And Risk Management (Effect And Classification Of Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (loss) recognized in other comprehensive income or loss | $ 5,404 | $ (951) | $ 5,474 | $ 1,929 |
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Cost Of Sales [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (loss) reclassified from accumulated other comprehensive income or loss to income or loss for the effective portion | 556 | 3,217 | 2,055 | 4,843 |
| Gain (loss) recognized in income or loss for amount excluded from effectiveness testing and for the ineffective portion | (120) | 8 | (328) | (37) |
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Sales [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (loss) recognized in income or loss for amount excluded from effectiveness testing and for the ineffective portion | (13) | 0 | (13) | 0 |
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Other Non-operating Income (Expense) [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (loss) recognized in income or loss | $ 5,368 | $ 137 | $ 3,397 | $ 6,149 |