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Share Repurchase Plan (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
4 Months Ended 6 Months Ended
Feb. 28, 2022
Feb. 28, 2022
Oct. 12, 2021
Share Repurchase Plan [Abstract]      
Share buy-back plan, amount authorized     $ 75,000
Share buy-back plan, number of shares repurchased 78,637    
Average price of shares repurchased $ 230.98    
Total cost of repurchased shares $ 18,200 $ 18,165