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Financial Instruments And Risk Management (Balance Sheet Classification And Fair Value Of Derivative Instruments) (Details) (Currency Forward Contracts [Member], USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2012
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Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative assets | $ 4,553 | $ 2,147 | $ 4,250 |
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Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative assets | 512 | 4,072 | 1,193 |
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Other Non-Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative assets | 0 | 489 | 565 |
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Accrued Liabilities [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative liabilities | 119 | 579 | 67 |
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Accrued Liabilities [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative liabilities | $ 684 | $ 743 | $ 421 |