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Summary Quarterly Information (Unaudited) (Details) (USD $)
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
Dec. 31, 2010
Dec. 31, 2009
Summary of unaudited quarterly result                      
Revenue $ 9,323,947 $ 9,510,792 $ 8,708,709 $ 7,079,406 $ 5,828,777 $ 4,987,074 $ 4,397,275 $ 3,918,021 $ 34,622,854 $ 19,131,147 $ 11,295,177
Gross profit 162,286 170,847 165,102 136,768 123,647 112,107 107,569 98,818 635,003 442,141 375,591
Net income including noncontrolling interest 53,030 53,842 50,673 41,657 39,238 36,374 37,051 33,840 199,202 146,503 117,563
Net income attributable to World Fuel $ 50,062 $ 52,655 $ 50,203 $ 41,109 $ 39,430 $ 36,755 $ 36,977 $ 33,703 $ 194,029 $ 146,865 $ 117,139
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