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Stock-based Compensation (Schedule Of Restricted Stock Units Activity) (Details) - Restricted Stock Units [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Number of Shares	96,920
Granted, Number of Shares	18,438
Converted to common shares, Number of Shares	(29,055)
Forfeited, Number of Shares	(149)
Outstanding, Number of Shares	86,154	96,920
Vested, Number of Shares	60,689
Outstanding, Weighted-Average Grant Date Fair Value Per Share	$ 86.01
Granted, Weighted-Average Grant Date Fair Value Per Share	184.43	$ 163.93	$ 111.71
Converted to common shares, Weighted-Average Grant Date Fair Value Per Share	88.24
Forfeited, Weighted-Average Grant Date Fair Value Per Share	156.83
Outstanding, Weighted-Average Grant Date Fair Value Per Share	106.20	$ 86.01
Vested, Weighted-Average Grant Date Fair Value Per Share	$ 83.15
Outstanding, Aggregate Intrinsic Value	$ 17,608
Vested, Aggregate Intrinsic Value	$ 12,404

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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