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Stock-Based Compensation Plans (Total Cost Of Stock-Based Compensation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 8,286 $ 8,617 $ (573)
Performance-Based Award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 6,133 7,298 (1,518)
Strive Acquisition Compensation [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 1,196 354  
Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 673 700 700
Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 239 205 185
Fully-Vested Share Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 45 $ 60 $ 60