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Acquisitions and Significant Accounting Policies (Details) (USD $) | 9 Months Ended |  | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  |
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Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Sep. 30, 2012 Aviation segment | Sep. 30, 2012 Marine segment | Sep. 30, 2012 2012 Acquisitions Item | Jun. 30, 2012 2012 Acquisitions Item | Sep. 30, 2012 2012 Acquisitions | Jun. 30, 2012 2012 Acquisitions Aviation segment Item | Sep. 30, 2012 2012 Acquisitions Aviation segment | Sep. 30, 2012 2012 Acquisitions Land segment | Sep. 30, 2012 2012 Acquisitions Trademark/Trade name rights | Sep. 30, 2012 2012 Acquisitions Customer relationships | Sep. 30, 2012 2012 Acquisitions Other identifiable intangible assets | Sep. 30, 2012 Carter Energy Corporation Item | Dec. 31, 2011 2011 Acquisitions Reclassification Reclassification 2 | Dec. 31, 2011 2011 Acquisitions Aviation segment Reclassification Reclassification 1 | Dec. 31, 2011 2011 Acquisitions Aviation segment Reclassification Reclassification 2 | Dec. 31, 2011 2011 Acquisitions Land segment Reclassification Reclassification 1
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acquisitions |  |  |  |  |  | 2 | 2 |  | 1 |  |  |  |  |  |  |  |  |  |
Minimum number of retail operators, to whom, acquired company distributes gasoline and diesel fuel |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700 |  |  |  |
Estimated aggregate purchase price of acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  | $ 71,151,000 |  | $ 71,151,000 |  |  |  |  |  |  |  | $ 700,000 |  |  |
Less: Promissory notes is sued |  |  |  |  |  | 7,214,000 |  | 7,214,000 |  |  |  |  |  |  |  |  |  |  |
Estimated cash consideration |  |  |  |  |  | 63,937,000 |  | 63,937,000 |  |  |  |  |  |  |  |  |  |  |
Plus: Amounts due from sellers, net |  |  |  |  |  | 23,000 |  | 23,000 |  |  |  |  |  |  |  |  |  |  |
Cash consideration paid |  |  |  |  |  | 63,960,000 |  | 63,960,000 |  |  |  |  |  |  |  |  |  |  |
Less: Cash acquired |  |  |  |  |  |  |  | 285,000 |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition of businesses, net of cash acquired | 71,337,000 | 112,315,000 |  |  |  |  |  | 63,675,000 |  |  |  |  |  |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | 285,000 |  | 285,000 |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  | 50,951,000 |  | 50,951,000 |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  | 7,311,000 |  | 7,311,000 |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  | 5,174,000 |  | 5,174,000 |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  | 24,380,000 |  | 24,380,000 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 51,300,000 |  |  |  |  | 49,538,000 |  | 49,538,000 |  |  |  |  |  |  |  |  |  |  |
Other current and long-term assets |  |  |  |  |  | 3,371,000 |  | 3,371,000 |  |  |  |  |  |  |  |  |  |  |
Liabilities assumed: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  | (57,994,000) |  | (57,994,000) |  |  |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  |  | (10,200,000) |  | (10,200,000) |  |  |  |  |  |  |  |  |  |  |
Other long-term liabilities |  |  |  |  |  | (1,665,000) |  | (1,665,000) |  |  |  |  |  |  |  |  |  |  |
Estimate purchase price |  |  |  |  |  | 71,151,000 |  | 71,151,000 |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of business, goodwill amount recorded | 53,900,000 |  |  |  |  |  |  |  |  | 7,300,000 | 42,200,000 |  |  |  |  |  |  |  |
Goodwill anticipated to be deductible for tax purposes |  |  |  |  |  | 40,800,000 |  | 40,800,000 |  |  |  |  |  |  |  |  |  |  |
Acquired identifiable finite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 20,600,000 | 2,000,000 |  |  |  |  |
Weighted average lives of identifiable intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 9 years 2 months 12 days | 6 years 3 months 18 days |  |  |  |  |
Acquired identifiable indefinite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  |  |  |  |
Identifiable intangible assets | 117,722,000 |  | 107,620,000 |  |  |  |  |  |  |  |  |  |  |  |  | (1,100,000) |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 396,923,000 |  | 346,246,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,900,000) | 1,800,000 | 2,900,000
Increase in goodwill | 50,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in goodwill due to foreign currency translation adjustments |  |  |  | 100,000 | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of accounts receivable to be sold under a Receivables Purchase Agreement ("RPA") | 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage rate added to floating market rate to get discount margin | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable sold | 84,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained beneficial interest recorded | $ 19,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 35 -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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- Definition The amount of acquisition cost of a business combination allocated to inventory, including finished goods, work-in-process, and raw materials. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -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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- Definition The amount of acquisition cost of a business combination allocated to accounts payable of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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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- Definition Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 53 -Subparagraph d -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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- Definition The amount of acquisition cost of a business combination allocated to land and building to be used in the normal course of business, not including assets that are held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph d -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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- Definition Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -Clause 1 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph l -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 Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 34 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 43 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph d -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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