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Share Repurchase Plan (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		16 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Oct. 12, 2021
Share Repurchase Plan [Abstract]
Share buy-back plan, amount authorized				$ 75,000
Share buy-back plan, number of shares repurchased	31,670		170,232
Average price of shares repurchased	$ 178.10		$ 204.39
Total cost of repurchased shares	$ 5,641	$ 18,165	$ 34,800

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The cash outflow to reacquire common stock during the period.

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-Publisher FASB
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-Topic 230
-SubTopic 10
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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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