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Nature of Business, Acquisitions, Significant Accounting Policies and Recent Accounting Pronouncements (Details 3) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
subsidiary
D
Dec. 31, 2010
Dec. 31, 2009
Cash and Cash Equivalents                      
Maximum original maturity period of cash equivalents (in days)                 90    
Accounts Receivable Purchase Agreement                      
Maximum amount of accounts receivable to be sold under a Receivables Purchase Agreement ("RPA") $ 125,000,000               $ 125,000,000    
Sales price as percentage of the sold accounts receivable balance less a discount margin 100.00%               100.00%    
Sales price as percentage of the sold accounts receivable balance less a discount margin, customers 90.00%               90.00%    
Percentage rate added to floating market rate to get discount margin 2.00%               2.00%    
Percentage of retained beneficial interest in sold accounts receivable 10.00%               10.00%    
Accounts receivable sold 42,000,000               42,000,000    
Retained beneficial interest recorded 3,200,000               3,200,000    
Extinguishment of Liability                      
Derecognized vendor liability accruals amount                 8,300,000 9,800,000 8,600,000
Vendor and Customer Rebates and Branding Allowances                      
Rebates and promotional allowance arrangements paid to customers                 3,400,000 2,300,000 3,000,000
Volume rebates received from vendors                 6,000,000 5,800,000 6,600,000
Foreign Currency                      
Number of subsidiaries in Brazil                 2    
Number of subsidiaries in U.K                 1    
Net foreign currency transaction losses                 2,700,000 1,800,000 600,000
Net gain (loss) on foreign currency translation adjustment                 (11,277,000) 958,000 7,135,000
Cumulative foreign currency translation adjustments                 (6,500,000) 4,800,000 3,800,000
Numerator:                      
Net income attributable to World Fuel $ 50,062,000 $ 52,655,000 $ 50,203,000 $ 41,109,000 $ 39,430,000 $ 36,755,000 $ 36,977,000 $ 33,703,000 $ 194,029,000 $ 146,865,000 $ 117,139,000
Denominator:                      
Weighted average common shares for basic earnings per common share                 70,687 62,168 59,003
Effect of dilutive securities (in shares)                 823 1,273 898
Weighted average common shares for diluted earnings per common share (in shares)                 71,510 63,441 59,901
Weighted average anti-dilutive securities which are not included in the calculation of diluted earnings per common share (in shares)                 103 305 803
Basic earnings per common share (in dollars per share) $ 0.70 $ 0.74 $ 0.71 $ 0.59 $ 0.57 $ 0.61 $ 0.62 $ 0.57 $ 2.74 $ 2.36 $ 1.99
Diluted earnings per common share (in dollars per share) $ 0.70 $ 0.74 $ 0.70 $ 0.58 $ 0.56 $ 0.60 $ 0.61 $ 0.56 $ 2.71 $ 2.31 $ 1.96