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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Jan. 31, 2014
Jul. 31, 2013
Stockholders’ equity:    
Preferred stock, par value (in dollars per share) $ 0.10 $ 0.10
Preferred stock, shares authorized (in shares) 2,000,000 2,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 29,186,440 29,066,792
Treasury stock, shares (in shares) 13,544,493 12,608,501