Financial Instruments And Risk Management (Gross Notional Amount Of Outstanding Derivative Instruments) (Details) - Currency Forward Contracts [Member] - USD ($) $ in Thousands |
Sep. 30, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
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| Derivative Instruments Designated As Cash Flow Hedges [Member] | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Currency forward contracts | $ 390,500 | $ 206,000 | $ 204,000 |
| Derivative Instruments Not Designated As Cash Flow Hedges [Member] | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Currency forward contracts | $ 181,045 | $ 184,940 | $ 189,159 |
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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