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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
May 31, 2012
Aug. 31, 2011
May 31, 2011
Condensed Consolidated Balance Sheets [Abstract]      
Receivables, allowance $ 1,786 $ 2,340 $ 2,464
Preferred stock, par value $ 1 $ 1 $ 1
Preferred stock, authorized 2,000,000 2,000,000 2,000,000
Preferred stock, issued 0 0 0
Preferred stock, outstanding 0 0 0
Common stock, par value $ 1 $ 1 $ 1
Common stock, authorized 25,000,000 25,000,000 25,000,000
Common stock, issued 18,413,000 18,374,000 18,269,000
Treasury stock, shares 5,698,000 5,698,000 5,698,000