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Business Segments and Foreign Operations (Schedule of Net Sales by Product Group) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Revenue from External Customer [Line Items]      
Net sales $ 537,255 $ 518,820 $ 488,109
Maintenance products      
Revenue from External Customer [Line Items]      
Net sales 503,558 485,326 448,817
Homecare and cleaning products      
Revenue from External Customer [Line Items]      
Net sales $ 33,697 $ 33,494 $ 39,292