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Commitments and Contingencies (Details 3) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Oct. 31, 2011 Litigation CRRM | Dec. 31, 2011 Litigation CRNF year | Dec. 31, 2010 Litigation CRNF | Dec. 31, 2009 Litigation CRNF | Dec. 31, 2008 Litigation CRNF | May 31, 2010 Litigation Oklahoma and Kansas CRRM lawsuit | Jun. 30, 2010 Flood, Crude Oil Discharge and Insurance | Oct. 31, 2009 Flood, Crude Oil Discharge and Insurance plaintiff | May 31, 2008 Flood, Crude Oil Discharge and Insurance claimant | Dec. 31, 2011 Flood, Crude Oil Discharge and Insurance | Oct. 25, 2010 Flood, Crude Oil Discharge and Insurance | Dec. 31, 2011 EHS landfill | Dec. 31, 2010 EHS landfill | Feb. 24, 2010 EHS | Feb. 28, 2010 EHS CRRM month | Dec. 31, 2011 EHS CRRM | Mar. 31, 2004 EHS CRRM and CRT | Mar. 31, 2004 EHS CRRM and CRT | Feb. 28, 2010 EHS Maximum year | Feb. 28, 2010 EHS Minimum year
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property tax abatement period (in years) |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in property tax expenses |  |  |  |  | $ 11,400,000 | $ 11,700,000 | $ 10,700,000 | $ 10,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in expenses related to use of inbound and outbound lines |  |  |  | 14,750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of private claimants |  |  |  |  |  |  |  |  |  |  |  | 16 |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of claims |  |  |  |  |  |  |  |  |  | 3,200,000 | 3,200,000 | 4,400,000 |  |  |  |  |  |  |  |  |  |  |
Number of additional plaintiffs |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Reimbursement of oversight cost |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  |  |  |  |  |  |
Insurance proceeds under primary environmental liability insurance policy |  | 3,161,000 |  |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |
Environmental, Health, and Safety ("EHS") Matters |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental accruals |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000 | 4,100,000 |  |  |  |  |  |  |
Environmental accruals included in other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 | 1,500,000 |  |  |  |  |  |  |
Estimated closure and post-closure costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 900,000 | 900,000 |  |  |  |  |  |  |
Number of landfills |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |  |
Estimated future payments for environmental obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 493,000 |  |  |  |  |  |  |  |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,000 |  |  |  |  |  |  |  |
2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,000 |  |  |  |  |  |  |  |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,000 |  |  |  |  |  |  |  |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 109,000 |  |  |  |  |  |  |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,077,000 |  |  |  |  |  |  |  |
Undiscounted total |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,177,000 |  |  |  |  |  |  |  |
Less amounts representing interest at 1.69% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 225,000 |  |  |  |  |  |  |  |
Accrued environmental liabilities at the end of the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,952,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.69% |  |  |  |  |  |  |  |
Expenses related to environmental, health and safety ("EHS") matters | 7,600,000 | 13,700,000 | 24,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining amount expected to be spent for environmental remediation compliance, including capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49,000,000 |  |  |
Expected capital expenditures related to environmental, health and safety ("EHS") matters |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 |  | 47,000,000 |  |
Renewable fuel as percentage of all fuel used as required by the EPA under the Renewable Fuel Standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |
Proposed renewable fuel as percentage of all fuel used in 2012 under the EPA's Renewable Fuel Standard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.00% |  |  |  |
Expense associated with the purchasing of Renewable Identification Numbers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,000,000 |  |  |  |
Extension period for installation of controls (in months) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |  |
Period over which incremental capital expenditure not material and limited primarily to retrofit and replacement of heaters and boilers (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 | 5
Environmental civil penalty |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 900,000 |  |  |  |  |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161 -Subparagraph a -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 5 -Paragraph 9 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 + Details
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- Definition The amount of imputed interest necessary to reduce (reconcile) the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies to the present value recognized on the balance sheet (if the accrual qualifies for discounting). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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- Definition The portion of the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies that is expected to be paid after the fifth year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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- Definition The portion of the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies that is expected to be paid in the fifth year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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- Definition The portion of the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies that is expected to be paid in the second year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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- Definition The portion of the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies that is expected to be paid in the third year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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- Definition The portion of the estimated aggregate undiscounted amount of the accrual for environmental loss contingencies that is expected to be paid within one year of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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