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Derivative Instruments And Hedging Activities (Impact Of Derivative Instruments On Accumulated Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) | $ (9,991) | $ (12,941) | $ 30,043
Foreign Exchange Contracts [Member] |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) | (9,796) |  |
Oil And Natural Gas Commodity Contracts [Member] |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) |  | (12,860) | 28,749
Interest Rate Swaps [Member] |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) | $ (195) | $ (81) | $ 1,294

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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + 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 (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration