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Fair Value Of Financial Instruments (Schedule Of Contingent Consideration Liability) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Fair Value Of Financial Instruments [Abstract]      
Contingent consideration liability at beginning of year $ 2,565 $ 2,530  
Payment of first contingent consideration award (2,167)    
Increase in contingent consideration liability 1,538 35 $ (1,579)
Contingent consideration liability at end of year $ 1,936 $ 2,565 $ 2,530