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Derivatives (Schedule of Outstanding Derivatives Entered Into to Hedge Inventory or Fixed Price Purchase Commitments) (Details) bbl in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 bbl $ / bbl
Future | Sell (Short) Contracts | Crude Oil | Designated as Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 694
Weighted average contract price per gal | $ / bbl | 48.03
Future | Sell (Short) Contracts | Crude Oil | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 482
Weighted average contract price per gal | $ / bbl | 50.17
Future | Sell (Short) Contracts | Diesel Futures [Member] | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 11
Weighted average contract price per gal | $ / bbl | 1.71
Future | Sell (Short) Contracts | RBOB Gas Futures [Member] | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 0
Weighted average contract price per gal | $ / bbl | 0.00
Future | Sell (Short) Contracts | Fuel Oil Futures | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 175
Weighted average contract price per gal | $ / bbl | 48.10
Future | Buy (Long) Contracts | Crude Oil | Designated as Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 0
Weighted average contract price per gal | $ / bbl | 0.00
Future | Buy (Long) Contracts | Crude Oil | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 322
Weighted average contract price per gal | $ / bbl | 50.76
Future | Buy (Long) Contracts | Diesel Futures [Member] | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 11
Weighted average contract price per gal | $ / bbl | 1.76
Future | Buy (Long) Contracts | RBOB Gas Futures [Member] | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 4
Weighted average contract price per gal | $ / bbl | 1.59
Future | Buy (Long) Contracts | Fuel Oil Futures | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 70
Weighted average contract price per gal | $ / bbl | 48.51
Options | Sell (Short) Contracts | Crude Oil | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 50
Underlying, Derivative | $ / bbl | 0.63
Options | Buy (Long) Contracts | Crude Oil | Not Designated As Hedging Instrument |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | bbl | 20
Underlying, Derivative | $ / bbl | 0.19

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + 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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