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Acquisition (Schedule Of Unaudited Proforma Information) (Details) (USD $)
In Thousands, except Per Share data
12 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Acquisition    
Net sales $ 2,817,400 $ 2,673,976
Net income $ 109,431 $ 119,676
Basic earnings per common share $ 1.96 $ 2.09
Diluted earnings per common share $ 1.96 $ 2.08