Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments And Risk Management (Balance Sheet Classification And Fair Value Of Derivative Instruments) (Details)

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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, 2012
Dec. 31, 2011
Jun. 30, 2011
Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets $ 3,993 $ 6,591 $ 108
Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 3,553 645 110
Other Non-Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 0 1,117 0
Other Long-Term Liabilities [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities 0 91 0
Accrued Liabilities [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities 225 824 5,750
Accrued Liabilities [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities $ 1,675 $ 2,962 $ 1,931