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Derivatives (Schedule Of Outstanding Derivatives Entered Into Hedge Inventory Or Fixed Price Purchase Commitments) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 Selling Contracts [Member] Crude Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Selling Contracts [Member] Crude oil LLS/WTI swap [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Selling Contracts [Member] Heating Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Selling Contracts [Member] Fuel Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Selling Contracts [Member] Crude Oil Options [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Buying Contracts [Member] Crude Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Buying Contracts [Member] Crude oil LLS/WTI swap [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Buying Contracts [Member] Heating Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Buying Contracts [Member] Fuel Oil Futures [Member] Not Designated As Hedging Instrument [Member] | Dec. 31, 2012 Buying Contracts [Member] Crude Oil Options [Member] Not Designated As Hedging Instrument [Member] | Jul. 31, 2010 DG Marine [Member]
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Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contract volumes (1,000 bbls) | $ 316 | $ 100 | $ 62 | $ 765 | $ 325 | $ 199 | $ 0 | $ 0 | $ 160 | $ 85 |
Weighted average contract price per bbl | 88.35 | 17.25 |  | 92.37 |  | 89.66 | 0.00 |  | 93.06 |  |
Weighted average contract price per gal |  |  | 3.02 |  |  |  |  | 0.00 |  |  |
Weighted average contract price per mmBtu |  |  |  |  | 1.61 |  |  |  |  | 0.55 |
Percentage of equity interest acquired |  |  |  |  |  |  |  |  |  |  | 51.00%

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Percentage of voting equity interests acquired in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c -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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- Details
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- Definition The price per barrel of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per barrel specified in a fuel oil forward purchase contract. + References No definition available. + Details
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- Definition The price per gallon of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per gallon specified in a fuel forward purchase contract. + References No definition available. + Details
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- Definition The price per unit of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per barrel specified in a fuel oil forward purchase contract. + References No definition available. + Details
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