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Business Segments And Foreign Operations (Schedule Of Net Sales By Product Group) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Revenue from External Customer [Line Items]
Net sales	$ 136,405	$ 98,247	$ 372,869	$ 296,852
Maintenance Products [Member]
Revenue from External Customer [Line Items]
Net sales	127,374	87,859	344,446	268,676
Homecare And Cleaning Products [Member]
Revenue from External Customer [Line Items]
Net sales	$ 9,031	$ 10,388	$ 28,423	$ 28,176

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