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Fair Value Measurements (Details 2) (USD $) | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Other current assets |  |
Fair value measurement, additional disclosure |  |
Cash collateral deposits held by financial counterparties | $ 16,200,000 | $ 13,000,000
Commodity contracts |  |
Derivative instruments, at their respective fair value positions |  |
Total net assets | 29,611,000 | 15,471,000
Total net liabilities | 10,455,000 | 14,686,000
Fair value measurement, additional disclosure |  |
Cash collateral received from customers | 2,100,000 | 4,700,000
Commodity contracts | Other current assets |  |
Derivative instruments, at their respective fair value positions |  |
Total net assets | 27,796,000 | 14,723,000
Commodity contracts | Identifiable intangible and other non-current assets |  |
Derivative instruments, at their respective fair value positions |  |
Total net assets | 1,815,000 | 748,000
Commodity contracts | Accrued expenses and other current liabilities |  |
Derivative instruments, at their respective fair value positions |  |
Total net liabilities | 9,578,000 | 14,332,000
Commodity contracts | Other long-term liabilities |  |
Derivative instruments, at their respective fair value positions |  |
Total net liabilities | 877,000 | 354,000
Foreign currency contracts |  |
Derivative instruments, at their respective fair value positions |  |
Total net assets | 515,000 | 2,136,000
Total net liabilities | 5,245,000 | 5,453,000
Foreign currency contracts | Other current assets |  |
Derivative instruments, at their respective fair value positions |  |
Total net assets | 515,000 | 2,136,000
Foreign currency contracts | Accrued expenses and other current liabilities |  |
Derivative instruments, at their respective fair value positions |  |
Total net liabilities | 5,038,000 | 5,306,000
Foreign currency contracts | Other long-term liabilities |  |
Derivative instruments, at their respective fair value positions |  |
Total net liabilities | $ 207,000 | $ 147,000

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it is permitted by contract or custom to sell or re-pledge to counterparties as collateral. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 + Details
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