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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 1337291000 1337291 false false false 2 false true false false 1081103000 1081103 false false false 3 false true false false 2561055000 2561055 false false false 4 false true false false 1724729000 1724729 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 64038000 64038 false false false 2 false true false false 72598000 72598 false false false 3 false true false false 139023000 139023 false false false 4 false true false false 148474000 148474 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. 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As a noncash item, the net amount is added back to net income when calculating cash provided by (used in) operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 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 115991000 115991 false false false 2 false true false false -82706000 -82706 false false false 3 false true false false 57904000 57904 false false false 4 false true false false 13475000 13475 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 8046000 8046 false false false 2 false true false false 6917000 6917 false false false 3 false true false false 15281000 15281 false false false 4 false true false false 14337000 14337 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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