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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, 2012
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Dec. 31, 2011
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Mar. 31, 2011
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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 | $ 4,250 | $ 6,591 | $ 156 |
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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 | 1,193 | 645 | 4,302 |
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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 | 565 | 1,117 | |
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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 | 91 | ||
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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 | 67 | 824 | 5,321 |
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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 | $ 421 | $ 2,962 | $ 2,528 |