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Derivative Instruments and Hedging Activities (Gain Loss Recognized In Income On Hedged Derivatives) (Details) - Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of Gain/(Loss) Recognized in Income on Derivative | $ 167 | $ (648) | $ (1,969)
Commodities contracts | Cost of Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of Gain/(Loss) Recognized in Income on Derivative | $ 167 | $ (648) | $ (1,969)

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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. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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