Stock-Based Compensation (Narrative) (Details)		3 Months Ended
Nov. 14, 2017 item shares	Nov. 30, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under terms of the award		251,234
Number of shares reduced, withheld for minimum statutory taxes		102,765
Fiscal 2018 Long Term Incentive Plan Award [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, 2020
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		9,887
Tranche One [Member] \| Fiscal 2018 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New shares granted	42,883
Percent of shares plan participants are entitled to	25.00%
Vesting period of awards	3 years
Tranche Two and Three [Member] \| Fiscal 2018 Long Term Incentive Plan Award [Member] \| Minimum [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] \| Fiscal 2018 Long Term Incentive Plan Award [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance award to be granted	200.00%
New shares granted	257,300

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