Stock-Based Compensation Plans (Stock Options Outstanding And Exercisable) (Details)	12 Months Ended
Aug. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding at August 31, 2018 \| shares	568,750
Options Exercisable at August 31, 2018 \| shares	568,750
$9.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices	$ 9.00
Number Outstanding at August 31, 2018 \| shares	62,500
Weighted Average Remaining Contractual Life	2 years 4 months 24 days
Weighted Average Exercise Price, Outstanding	$ 9.00
Options Exercisable at August 31, 2018 \| shares	62,500
Weighted Average Exercise Price, Exercisable	$ 9.00
$10.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices	$ 10.00
Number Outstanding at August 31, 2018 \| shares	168,750
Weighted Average Remaining Contractual Life	1 year 9 months 18 days
Weighted Average Exercise Price, Outstanding	$ 10.00
Options Exercisable at August 31, 2018 \| shares	168,750
Weighted Average Exercise Price, Exercisable	$ 10.00
$12.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices	$ 12.00
Number Outstanding at August 31, 2018 \| shares	168,750
Weighted Average Remaining Contractual Life	1 year 9 months 18 days
Weighted Average Exercise Price, Outstanding	$ 12.00
Options Exercisable at August 31, 2018 \| shares	168,750
Weighted Average Exercise Price, Exercisable	$ 12.00
$14.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices	$ 14.00
Number Outstanding at August 31, 2018 \| shares	168,750
Weighted Average Remaining Contractual Life	1 year 9 months 18 days
Weighted Average Exercise Price, Outstanding	$ 14.00
Options Exercisable at August 31, 2018 \| shares	168,750
Weighted Average Exercise Price, Exercisable	$ 14.00

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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