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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, 2022
Aug. 31, 2021
Aug. 31, 2020
Revenue from External Customer [Line Items]      
Net sales $ 518,820 $ 488,109 $ 408,498
Maintenance Products [Member]      
Revenue from External Customer [Line Items]      
Net sales 485,326 448,817 369,444
HCCP [Member]      
Revenue from External Customer [Line Items]      
Net sales $ 33,494 [1] $ 39,292 [1] $ 39,054
[1] Homecare and cleaning products (“HCCP”)