Income Taxes (Schedule Of Earnings Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Income Taxes [Abstract]
United States									$ 17,805	$ 49,668	$ 70,066
Foreign									11,483	(2,917)	8,589
Earnings before income taxes	$ 11,020	$ 14,065	$ (6,193)	$ 10,396	$ 529	$ 20,423	$ 14,138	$ 11,661	$ 29,288	$ 46,751	$ 78,655

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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No definition available.

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