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Acquisitions and Significant Accounting Policies (Details) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 3 Months Ended |  | 9 Months Ended | 1 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 30, 2011 USD ($) | Sep. 30, 2010 USD ($) | Sep. 30, 2011 USD ($) | Sep. 30, 2010 USD ($) | Sep. 30, 2011 2011 Acquisitions USD ($) business | Sep. 30, 2011 2011 Acquisitions USD ($) | Sep. 30, 2011 2011 Acquisitions Aviation segment USD ($) | Sep. 30, 2011 2011 Acquisitions Land segment USD ($) | Sep. 30, 2011 2011 Acquisitions Marine segment USD ($) | Jun. 30, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition business | Apr. 02, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition site | Sep. 30, 2011 2010 Acquisitions USD ($) | Sep. 30, 2011 2010 Acquisitions Aviation segment USD ($) | Sep. 30, 2011 2010 Acquisitions Land segment USD ($) | Sep. 30, 2011 2010 Acquisitions Marine segment USD ($) | Apr. 30, 2009 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") year | Sep. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") USD ($) | Sep. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") GBP (£) | Sep. 30, 2011 Aviation segment USD ($) | Sep. 30, 2010 Aviation segment USD ($) | Sep. 30, 2011 Aviation segment USD ($) | Sep. 30, 2010 Aviation segment USD ($) | Sep. 30, 2011 Land segment USD ($) | Sep. 30, 2010 Land segment USD ($) | Sep. 30, 2011 Land segment USD ($) | Sep. 30, 2010 Land segment USD ($) | Sep. 30, 2011 Marine segment USD ($) | Sep. 30, 2010 Marine segment USD ($) | Sep. 30, 2011 Marine segment USD ($) | Sep. 30, 2010 Marine segment USD ($)
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of businesses acquired |  |  |  |  | 4 |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aviation companies acquired |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of land companies acquired |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum number of airports and fixed base operators supplied by acquired company |  |  |  |  |  |  |  |  |  |  | 450 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ (400,000) | $ 11,600,000 | $ 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in identifiable intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | (9,300,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in fixed assets |  |  |  |  |  |  |  |  |  |  |  |  | (500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in the aggregate purchase price of acquisitions |  |  |  |  |  |  |  |  |  |  |  | 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconcilition of the estimated aggregate purchase price for the 2011 acquisitions to the cash paid for the acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated purchase price |  |  |  |  | 153,213,000 | 153,213,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Promissory notes issued for acquisition | 8,300,000 |  | 8,300,000 |  | 8,278,000 | 8,278,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Common stock issued |  |  |  |  | 27,491,000 | 27,491,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cash consideration |  |  |  |  | 117,444,000 | 117,444,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount due to sellers |  |  |  |  | 6,007,000 | 6,007,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration paid |  |  |  |  | 111,437,000 | 111,437,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less:Cash acquired |  |  |  |  |  |  |  |  |  |  |  | 2,638,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition of businesses, net of cash acquired |  |  | (112,315,000) | (46,015,000) |  |  |  |  |  |  |  | 108,799,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | 2,638,000 | 2,638,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 60,923,000 | 60,923,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  | 38,045,000 | 38,045,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current and long-term assets |  |  |  |  | 15,713,000 | 15,713,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  | 22,559,000 | 22,559,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  | 18,780,000 | 18,780,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | 42,850,000 | 42,850,000 | 39,500,000 | 600,000 | 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities assumed: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  | (36,434,000) | (36,434,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumed employee benefits |  |  |  |  | (5,421,000) | (5,421,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  | (3,031,000) | (3,031,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other long-term liabilities |  |  |  |  | (3,409,000) | (3,409,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated purchase price |  |  |  |  | 153,213,000 | 153,213,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill anticipated to be deductible for tax purposes |  |  |  |  | 25,900,000 | 25,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | 9,510,792,000 | 4,987,074,000 | 25,298,907,000 | 13,302,370,000 | 163,600,000 | 349,600,000 |  |  |  |  |  |  |  |  |  |  |  |  | 3,540,503,000 | 1,857,154,000 | 9,551,924,000 | 5,007,920,000 | 1,925,113,000 | 773,827,000 | 5,169,405,000 | 1,563,094,000 | 4,045,176,000 | 2,356,093,000 | 10,577,578,000 | 6,731,356,000
Net income | 52,655,000 | 36,755,000 | 143,967,000 | 107,435,000 | 4,700,000 | 9,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro Forma Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | 9,510,792,000 | 5,100,149,000 | 25,486,686,000 | 13,592,036,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to World Fuel | 52,655,000 | 38,123,000 | 151,582,000 | 109,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.74 | $ 0.62 | $ 2.14 | $ 1.81 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted (in dollars per share) | $ 0.74 | $ 0.61 | $ 2.12 | $ 1.78 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earn-out |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period for acquiree to meet certain operating targets for earn-out payment (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Earn-out payment prior to purchase agreement amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,300,000 | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Minimum Earn-out payment established in consideration for the reduction in the maximum Earn-out |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,200,000 | 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the earn-out liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 | £ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |

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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 receivables. + 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 b -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 other current liabilities of the acquired entity. Does not include amounts allocated to the current portion of long-term debt, accounts payable and accrued expenses. + 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 other noncurrent liabilities 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 The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations. + 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 The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16, 17 -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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
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- Definition Pro forma diluted earnings per share, which is commonly presented in initial public offerings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 11 -Section 02 -Paragraph b -Subparagraph 7 + Details
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- Definition Purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Subparagraph e -Paragraph 45 -Clause 7 -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 Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1377-109256 + Details
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