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Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Feb. 28, 2017	Nov. 30, 2014	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Finite Lived Intangible Assets [Line Items]
Goodwill			$ 95,597,000	$ 95,649,000	$ 96,409,000
Impairment of goodwill	$ 0		0	0	0
Impairment charges			0	0	0
Estimated fair value			16,244,000	$ 19,191,000	$ 22,961,000
GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		$ 4,100,000
Cash paid		3,700,000
Goodwill		1,300,000
Customer-Related [Member] | GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		$ 1,700,000
Estimated useful life		8 years
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Estimated fair value			15,011,000
Trade Names [Member] | GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		$ 900,000
Estimated useful life		10 years
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Estimated fair value			33,000
Technology [Member] | GT 85 Limited [Member]
Finite Lived Intangible Assets [Line Items]
Purchase consideration		$ 200,000
Estimated useful life		4 years
Customer-Based [Member]
Finite Lived Intangible Assets [Line Items]
Estimated fair value			$ 1,200,000

X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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