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Business Segments And Foreign Operations (Net Sales And Long-Lived Assets By Geographical Area) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales $ 423,350 $ 408,518 $ 380,506
Long-lived assets [1] 45,076 36,357 29,439
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 157,904 154,986 150,086
Long-lived assets [1] 24,535 21,986 23,346
International [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 265,446 253,532 230,420
Long-lived assets [1] $ 20,541 $ 14,371 $ 6,093
[1] Includes tangible assets and property and equipment, net, attributed to the geographic location in which such assets are located.