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Fair Value Measurements And Derivative Instruments (Schedule Of Realized (Gains) Losses On Derivatives Recognized In Statement Of Operations) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Derivatives designated as cash flow hedges: | Commodity Forward Derivatives [Member] | Recorded in Cost of Sales |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Amount of (Gain)/Loss Recognized | $ (919) | $ 0 | $ 0
Derivatives not designated as hedges: | Foreign currency derivatives | Cost Of Good Sold Other Expense Income [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Amount of (Gain)/Loss Recognized | $ (522) | $ (1,565) | $ 549

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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