Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Financial Instruments And Risk Management (Balance Sheet Classification And Fair Value Of Derivative Instruments) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member] | Currency Forward Contracts [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets $ 2,101 $ 9,993 $ 5,986
Prepaid Expenses And Other Current Assets [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member] | Currency Forward Contracts [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 391 2,754 2,708
Other Non-Current Assets [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member] | Currency Forward Contracts [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative assets 309 0 0
Accrued Liabilities [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member] | Currency Forward Contracts [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities 170 0 0
Accrued Liabilities [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member] | Currency Forward Contracts [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liabilities $ 489 $ 924 $ 0
Maximum [Member]      
Derivatives, Fair Value [Line Items]      
Derivatives maximum remaining maturity 2 years