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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 |  |

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- Definition Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + Details
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