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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, 2014
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Dec. 31, 2013
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Mar. 31, 2013
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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 | $ 2,391 | $ 1,936 | $ 4,553 |
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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 | 312 | 2,956 | 512 |
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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 | 128 | 24 | 0 |
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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 | 1,017 | 872 | 119 |
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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 | 0 | 280 | 684 |
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Other Long Term Liabilities [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
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| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative liabilities | $ 33 | $ 95 | $ 0 |