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Derivatives (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Gain (loss) on derivative |  |  |  |
Gains or losses that were excluded from the assessment of the effectiveness of fair value hedges | $ 0 | $ 0 | $ 0 | $ 0
Gains or losses, which were excluded from the assessment of the effectiveness of cash flow 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 | (20,100) | (2,100) | (16,100) | (1,700)
Realized and Unrealized Gain (Loss) on Hedged Item | 19,800 | (1,100) | 19,300 | (8,600)
Derivatives not designated as hedging instruments |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | (400) | 13,000 | 21,600 | 28,500
Derivatives not designated as hedging instruments | Commodity contracts | Revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | 25,400 | 17,200 | 46,000 | 24,100
Derivatives not designated as hedging instruments | Commodity contracts | Cost of revenue. |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | (16,400) | (600) | (28,100) | 9,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Revenue |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | (5,200) | (1,000) | (1,300) | (1,300)
Derivatives not designated as hedging instruments | Foreign currency contracts | Other income (expense), net |  |  |  |
Gain (loss) on derivative |  |  |  |
Realized and Unrealized Gain (Loss) | $ (4,200) | $ (2,600) | $ 5,000 | $ (3,300)

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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 The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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