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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 true 7 Costs and expenses: 1 us-gaap_CostsAndExpensesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 8 Raw material, freight and other costs 2 us-gaap_RefiningAndMarketingCosts us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 1283773000 1283773 false false false 2 false true false false 1089612000 1089612 false false false 3 false true false false 3844828000 3844828 false false false 4 false true false false 2814341000 2814341 false false false xbrli:monetaryItemType monetary Cost incurred related to the downstream oil and gas activities, including refining of crude oil and marketing and distribution of crude oil, refined petroleum products, and natural gas. No authoritative reference available. false 9 Refinery operating expenses, excluding depreciation 2 us-gaap_OperatingCostsAndExpenses us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 82878000 82878 false false false 2 false true false false 83701000 83701 false false false 3 false true false false 221901000 221901 false false false 4 false true false false 232175000 232175 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No authoritative reference available. false 10 Selling and general expenses, excluding depreciation 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 13194000 13194 false false false 2 false true false false 13650000 13650 false false false 3 false true false false 35390000 35390 false false false 4 false true false false 38937000 38937 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. 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No authoritative reference available. false 12 Gain on sales of assets 2 us-gaap_GainLossOnDispositionOfAssets us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false 3 false true false false -1000 -1 false false false 4 false true false false 0 0 false false false xbrli:monetaryItemType monetary The gains and losses included in earnings resulting from the sale or disposal of tangible assets. 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No authoritative reference available. true 14 Operating income (loss) 1 us-gaap_OperatingIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 16318000 16318 false false false 2 false true false false -4480000 -4480 false false false 3 false true false false 74222000 74222 false false false 4 false true false false 8995000 8995 false false false xbrli:monetaryItemType monetary The net result for the period of deducting operating expenses from operating revenues. No authoritative reference available. true 15 Interest expense and other financing costs 1 us-gaap_InterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 9025000 9025 false false false 2 false true false false 6709000 6709 false false false 3 false true false false 24306000 24306 false false false 4 false true false false 21046000 21046 false false false xbrli:monetaryItemType monetary The cost of borrowed funds accounted for as interest that was charged against earnings during the period. 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This item does not include realized or unrealized gains or losses on the sale or holding of investments in debt and equity securities required to be included in earnings for the period or for other than temporary losses related to investments in debt and equity securities which are included in realized losses in the period recognized, and does not include investment income from real or personal property, such as rental income. 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If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. 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