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Unrecognized cost of unvested share-based compensation awards.

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Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of share instruments newly issued under a share-based compensation plan.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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Stock-Based Compensation (Narrative) (Details) $ in Millions		3 Months Ended	6 Months Ended
	Oct. 18, 2019 item shares	Feb. 29, 2020 USD ($) shares	Feb. 29, 2020 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under terms of the award			270,531
Income tax benefit from exercise of stock options \| $			$ 1.8
Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches \| item	3
Life of awards	3 years
Expiration date	Aug. 31, 2022
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price of common stock as a percent of the average fair market value			85.00%
Shares issued to employee stock purchase plan participants		7,293	15,427
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for tax			103,117
Shares withheld for tax, fair value \| $			$ 3.6
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for tax			102,656
Shares withheld for tax, fair value \| $			$ 3.6
Aggregate intrinsic value \| $		$ 8.0
Income tax benefit from exercise of stock options \| $		1.8
Restricted Stock Awards [Member] \| Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense \| $		$ 0.6	$ 0.6
Time-Based Award [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches \| item	1
Performance-Based Award [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches \| item	2
Tranche One [Member] \| Time-Based Award [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares plan participants are entitled to	25.00%
Vesting period of awards	3 years
Shares issued under terms of the award	25,101
Tranche Two and Three [Member] \| Performance-Based Award [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance-based objectives	100.00%
Shares issued under terms of the award	75,315
Tranche Two and Three [Member] \| Performance-Based Award [Member] \| Minimum [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance award to be granted	50.00%
Tranche Two and Three [Member] \| Performance-Based Award [Member] \| Maximum [Member] \| Fiscal 2020 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance award to be granted	200.00%
New shares granted	150,630