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Nature of Business, Acquisitions, Significant Accounting Policies and Recent Accounting Pronouncements (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Numerator:                      
Net income attributable to World Fuel $ 51,862 $ 51,472 $ 51,016 $ 48,725 $ 42,836 $ 51,494 $ 48,600 $ 46,415 $ 203,075 $ 189,345 $ 194,029
Denominator:                      
Weighted average common shares for basic earnings per common share                 71,224 71,154 70,687
Effect of dilutive securities (in shares)                 576 663 823
Weighted average common shares for diluted earnings per common share                 71,800 71,817 71,510
Weighted average securities which are not included in the calculation of diluted earnings per common share (in shares)                 594 603 103
Basic earnings per common share (in dollars per share) $ 0.73 $ 0.72 $ 0.71 $ 0.68 $ 0.60 $ 0.72 $ 0.68 $ 0.65 $ 2.85 $ 2.66 $ 2.74
Diluted earnings per common share (in dollars per share) $ 0.73 $ 0.72 $ 0.71 $ 0.68 $ 0.60 $ 0.72 $ 0.68 $ 0.65 $ 2.83 $ 2.64 $ 2.71