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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 |
Jun. 30, 2014
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Dec. 31, 2013
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Jun. 30, 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 | $ 986 | $ 1,936 | $ 2,516 |
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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 | 302 | 2,956 | 1,855 |
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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 | 155 | 24 | 343 |
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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 | 1,081 | 872 | 262 |
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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 | 650 | 280 | 460 |
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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 | $ 12 | $ 95 | $ 0 |