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Acquisition (Schedule Of Unaudited Pro Forma Information) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
6 Months Ended
Jan. 31, 2011
Acquisition [Abstract]  
Net sales $ 1,194,803
Net income $ 32,504
Basic earnings per common share $ 0.58
Diluted earnings per common share $ 0.58