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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Employee Benefit Plans [Abstract]      
Maximum percent of gross wages employees may contribute 75.00%    
Matching contributions $ 2.7 $ 2.5 $ 2.3