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Business Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 05, 2018
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Business Acquisition, Contingent Consideration [Line Items]        
Purchase price in cash $ 159      
Business Combination, Consideration Transferred, Accounts Receivable $ 798      
Contingent consideration   $ 3,883 $ 5,229  
Selling, general, and administrative   129,979 $ 140,530 $ 138,280
Germany, Switzerland, And Austria Licensee [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Selling, general, and administrative   $ 500