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Nature of Business, Acquisitions, Significant Accounting Policies and Recent Accounting Pronouncements (Details) (USD $) | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |
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Dec. 31, 2012 Item | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Aviation segment | Dec. 31, 2011 Aviation segment | Dec. 31, 2012 Land segment | Dec. 31, 2011 Land segment | Dec. 31, 2011 Marine segment | Dec. 31, 2012 2012 Acquisitions | Dec. 31, 2012 2012 Acquisitions Aviation segment | Dec. 31, 2012 2012 Acquisitions Land segment | Dec. 31, 2012 2012 Acquisitions Trademark/Trade name rights | Dec. 31, 2012 2012 Acquisitions Customer relationships | Dec. 31, 2012 2012 Acquisitions Other identifiable intangible assets | Dec. 31, 2012 2012 Acquisitions Multi Service Corporation Item | Sep. 01, 2012 2012 Acquisitions Carter Energy Corporation Item | Dec. 31, 2012 2012 Acquisitions Immaterial Business Acquisitions gal | Dec. 31, 2012 2012 Acquisitions Immaterial Business Acquisitions Aviation segment Item | Dec. 31, 2012 2011 Acquisitions | Dec. 31, 2011 2011 Acquisitions | Apr. 02, 2011 2011 Acquisitions Carter Energy Corporation Item | Dec. 31, 2011 2011 Acquisitions Immaterial Business Acquisitions Aviation segment Item | Dec. 31, 2011 2011 Acquisitions Immaterial Business Acquisitions Land segment Item | Dec. 31, 2011 2011 Acquisitions Immaterial Business Acquisitions Marine segment Item | Dec. 31, 2011 2010 Acquisitions | Dec. 31, 2010 2010 Acquisitions | Dec. 31, 2010 2010 Acquisitions Hiller Item
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum number of truck stops for global fuel procurement and commercial payment programs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,500 |  |  |  |  |  |  |  |  |  |  |  |
Minimum number of retail operators, to whom, acquired company distributes gasoline and diesel fuel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700 |  |  |  |  | 450 |  |  |  |  |  | 425
Number of businesses acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 2 |  |  |  | 3 | 2 | 1 |  |  |
Estimated aggregate purchase price of acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  | $ 226,485,000 |  |  |  |  |  |  |  |  |  |  | $ 161,736,000 |  |  |  |  |  | $ 240,813,000 |
Less: Cash acquired |  |  |  |  |  |  |  |  | 12,771,000 |  |  |  |  |  |  |  |  |  |  | 2,638,000 |  |  |  |  |  | 6,840,000 |
Purchase price, net of cash acquired |  |  |  |  |  |  |  |  | 213,714,000 |  |  |  |  |  |  |  |  |  |  | 159,098,000 |  |  |  |  |  | 233,973,000 |
Less: Promissory notes issued | 7,200,000 | 9,000,000 | 26,500,000 |  |  |  |  |  | 7,214,000 |  |  |  |  |  |  |  |  |  |  | 9,028,000 |  |  |  |  |  | 25,137,000 |
Less: Common stock issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,491,000 |  |  |  |  |  | 21,070,000 |
Less: Amounts due to sellers, net |  |  |  |  |  |  |  |  | 17,669,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Extinguishment of certain receivables from Falmouth Oil Services Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,401,000 |
Cash paid for acquisition of businesses | 217,782,000 | 122,702,000 | 177,807,000 |  |  |  |  |  | 188,831,000 |  |  |  |  |  |  |  |  |  |  | 122,579,000 |  |  |  |  |  | 181,365,000 |
Cash paid on purchase price adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 |  |  |  |  |  | 3,600,000 |  |
Assets acquired: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  | 12,771,000 |  |  |  |  |  |  |  |  |  |  | 2,638,000 |  |  |  |  |  | 6,840,000 |
Accounts receivable |  |  |  |  |  |  |  |  | 135,304,000 |  |  |  |  |  |  |  |  |  |  | 61,741,000 |  |  |  |  |  | 115,075,000 |
Inventories |  |  |  |  |  |  |  |  | 7,311,000 |  |  |  |  |  |  |  |  |  |  | 40,246,000 |  |  |  |  |  | 25,548,000 |
Property and equipment |  |  |  |  |  |  |  |  | 11,034,000 |  |  |  |  |  |  |  |  |  |  | 23,838,000 |  |  |  |  |  | 19,565,000 |
Identifiable intangible assets |  |  |  |  |  |  |  |  | 83,890,000 |  |  |  |  |  |  |  |  |  |  | 23,414,000 |  |  |  |  |  | 45,171,000 |
Goodwill |  |  |  |  |  |  |  |  | 123,193,000 |  |  |  |  |  |  |  |  |  |  | 46,282,000 |  |  |  |  |  | 148,436,000 |
Other current and long-term assets |  |  |  |  |  |  |  |  | 4,798,000 |  |  |  |  |  |  |  |  |  |  | 15,717,000 |  |  |  |  |  | 9,976,000 |
Liabilities assumed: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  | (130,107,000) |  |  |  |  |  |  |  |  |  |  | (38,617,000) |  |  |  |  |  | (86,987,000) |
Assumed pension fund exit fee (post employment benefits) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (11,306,000) |
Accrued expenses and other current liabilities |  |  |  |  |  |  |  |  | (18,544,000) |  |  |  |  |  |  |  |  |  |  | (8,453,000) |  |  |  |  |  | (24,349,000) |
Other long-term liabilities |  |  |  |  |  |  |  |  | (3,165,000) |  |  |  |  |  |  |  |  |  |  | (5,070,000) |  |  |  |  |  | (7,156,000) |
Estimate purchase price |  |  |  |  |  |  |  |  | 226,485,000 |  |  |  |  |  |  |  |  |  |  | 161,736,000 |  |  |  |  |  | 240,813,000 |
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of business, goodwill amount recorded | 123,193,000 | 44,526,000 |  | 8,028,000 | 38,506,000 | 115,165,000 | 4,057,000 | 1,963,000 |  | 8,000,000 | 115,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill anticipated to be deductible for tax purposes |  |  |  |  |  |  |  |  | 87,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired identifiable finite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 53,600,000 | 18,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average amortizable lives of identifiable intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 6 years 8 months 12 days | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired identifiable indefinite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  | 11,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable operating business segments | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | 60,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained beneficial interest recorded | 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other investments | 41,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derecognized vendor liability accruals amount | 11,200,000 | 8,300,000 | 9,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net foreign currency transaction gain | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net foreign currency transaction losses |  | 2,700,000 | 1,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) gain on foreign currency translation adjustment | (9,606,000) | (11,277,000) | 958,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative foreign currency translation adjustment losses | $ (16,018,000) | $ (6,524,000) | $ 4,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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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