Financial Instruments and Risk Management (Narrative) (Details) |
12 Months Ended |
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Dec. 31, 2017
USD ($)
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| Derivatives [Line Items] | |
| Deferred net gains on derivatives accumulated in other comprehensive income expected to be reclassified to net income in next twelve months | $ 10,261,000 |
| Maximum [Member] | |
| Derivatives [Line Items] | |
| Remaining maturity of derivative contracts | 3 years |
| Aggregate unrealized gain of derivative contracts with single counterparty | $ 2,000,000 |
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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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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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