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Derivatives (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Gain (loss) on derivative |  |  |  |
Gains or losses that were excluded from the assessment of the effectiveness of fair value hedges | $ 0 | $ 0 | $ 0 | $ 0
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts | Cost of revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) on Hedge | 36,273 | (12,032) | 34,572 | 7,593
Realized and Unrealized Gain (Loss) on Hedged Item | (36,227) | 10,937 | (44,869) | (7,224)
Derivatives not designated as hedging instruments |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | 32,310 | (2,029) | 60,836 | 25,474
Derivatives not designated as hedging instruments | Commodity contracts | Revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | 19,775 | 6,589 | 43,918 | 26,096
Derivatives not designated as hedging instruments | Commodity contracts | Cost of revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | 760 | (521) | 9,805 | 893
Derivatives not designated as hedging instruments | Foreign currency contracts | Revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | 2,901 | (1,992) | 1,564 | 748
Derivatives not designated as hedging instruments | Foreign currency contracts | Other income, net |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | $ 8,874 | $ (6,105) | $ 5,549 | $ (2,263)

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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