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Unaudited Pro Forma Financial Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Oct. 31, 2010
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]  
Revenues $ 4,062,610
Operating profit 111,788
Net income $ 62,109
Net income per common share  
Basic $ 1.19
Diluted $ 1.17