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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Aug. 31, 2014
Aug. 31, 2013
Consolidated Balance Sheets [Abstract]    
Receivables, allowance, current $ 2,857 $ 2,853
Receivables, allowance, noncurrent $ 2,000 $ 0
Preferred stock, par value $ 1 $ 1
Preferred stock, authorized 2,000,000 2,000,000
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0
Common stock, par value $ 1 $ 1
Common stock, authorized 25,000,000 25,000,000
Common stock, issued 18,636,000 18,571,000
Treasury stock, shares 6,196,000 5,698,000