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Fair Value Measurements (Details) (USD $) | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Fair value measurement, additional disclosure |  |
Cash collateral deposits held by financial counterparties | $ 4,900,000 | $ 11,800,000
Netting and Collateral |  |
Fair value measurement, additional disclosure |  |
Cash collateral deposits held by financial counterparties | 200,000 |
Fair value measured on recurring basis | Level 1 |  |
Assets: |  |
Total assets | 31,312,000 | 14,038,000
Liabilities: |  |
Total liabilities | 32,699,000 | 10,148,000
Fair value measured on recurring basis | Level 1 | Commodity contracts |  |
Assets: |  |
Total assets | 31,312,000 | 14,038,000
Liabilities: |  |
Total liabilities | 32,699,000 | 10,148,000
Fair value measured on recurring basis | Level 2 |  |
Assets: |  |
Total assets | 112,387,000 | 57,449,000
Liabilities: |  |
Total liabilities | 105,845,000 | 47,796,000
Fair value measured on recurring basis | Level 2 | Commodity contracts |  |
Assets: |  |
Total assets | 106,622,000 | 51,033,000
Liabilities: |  |
Total liabilities | 96,007,000 | 46,754,000
Fair value measured on recurring basis | Level 2 | Foreign currency contracts |  |
Assets: |  |
Total assets | 5,190,000 | 2,994,000
Liabilities: |  |
Total liabilities | 8,393,000 | 1,018,000
Fair value measured on recurring basis | Level 2 | Hedged item inventories |  |
Assets: |  |
Total assets | 575,000 | 3,216,000
Liabilities: |  |
Total liabilities | 1,445,000 | 24,000
Fair value measured on recurring basis | Level 2 | Hedged item commitments |  |
Assets: |  |
Total assets |  | 206,000
Fair value measured on recurring basis | Level 3 |  |
Assets: |  |
Notes receivable | 7,000,000 | 6,800,000
Total assets | 1,747,000 |
Liabilities: |  |
Debt | 287,200,000 | 287,100,000
Total liabilities |  | 4,194,000
Fair value measured on recurring basis | Level 3 | Commodity contracts |  |
Assets: |  |
Total assets | 1,747,000 |
Fair value measured on recurring basis | Level 3 | Earn-out |  |
Liabilities: |  |
Total liabilities |  | 4,194,000
Fair value measured on recurring basis | Sub-Total |  |
Assets: |  |
Total assets | 145,446,000 | 71,487,000
Liabilities: |  |
Total liabilities | 138,544,000 | 62,138,000
Fair value measured on recurring basis | Sub-Total | Commodity contracts |  |
Assets: |  |
Total assets | 139,681,000 | 65,071,000
Liabilities: |  |
Total liabilities | 128,706,000 | 56,902,000
Fair value measured on recurring basis | Sub-Total | Foreign currency contracts |  |
Assets: |  |
Total assets | 5,190,000 | 2,994,000
Liabilities: |  |
Total liabilities | 8,393,000 | 1,018,000
Fair value measured on recurring basis | Sub-Total | Hedged item inventories |  |
Assets: |  |
Total assets | 575,000 | 3,216,000
Liabilities: |  |
Total liabilities | 1,445,000 | 24,000
Fair value measured on recurring basis | Sub-Total | Hedged item commitments |  |
Assets: |  |
Total assets |  | 206,000
Fair value measured on recurring basis | Sub-Total | Earn-out |  |
Liabilities: |  |
Total liabilities |  | 4,194,000
Fair value measured on recurring basis | Netting and Collateral |  |
Assets: |  |
Total assets | (106,965,000) | (44,168,000)
Liabilities: |  |
Total liabilities | (106,715,000) | (44,184,000)
Fair value measured on recurring basis | Netting and Collateral | Commodity contracts |  |
Assets: |  |
Total assets | (101,945,000) | (43,275,000)
Liabilities: |  |
Total liabilities | (101,695,000) | (43,291,000)
Fair value measured on recurring basis | Netting and Collateral | Foreign currency contracts |  |
Assets: |  |
Total assets | (5,020,000) | (893,000)
Liabilities: |  |
Total liabilities | (5,020,000) | (893,000)
Fair value measured on recurring basis | Total |  |
Assets: |  |
Total assets | 38,481,000 | 27,319,000
Liabilities: |  |
Total liabilities | 31,829,000 | 17,954,000
Fair value measured on recurring basis | Total | Commodity contracts |  |
Assets: |  |
Total assets | 37,736,000 | 21,796,000
Liabilities: |  |
Total liabilities | 27,011,000 | 13,611,000
Fair value measured on recurring basis | Total | Foreign currency contracts |  |
Assets: |  |
Total assets | 170,000 | 2,101,000
Liabilities: |  |
Total liabilities | 3,373,000 | 125,000
Fair value measured on recurring basis | Total | Hedged item inventories |  |
Assets: |  |
Total assets | 575,000 | 3,216,000
Liabilities: |  |
Total liabilities | 1,445,000 | 24,000
Fair value measured on recurring basis | Total | Hedged item commitments |  |
Assets: |  |
Total assets |  | 206,000
Fair value measured on recurring basis | Total | Earn-out |  |
Liabilities: |  |
Total liabilities |  | $ 4,194,000

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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 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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