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Earnings Per Common Share (Schedule Of Reconciliation Of Net Income To Net Income Available To Common Shareholders) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Earnings Per Common Share [Abstract]
Net income	$ 65,215	$ 52,930	$ 52,628
Less: Net income allocated to participating securities	(423)	(323)	(334)
Net income available to common shareholders	$ 64,792	$ 52,607	$ 52,294

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The portion of net income for the reporting period allocated to participating securities other than common shares for the purpose of computing earnings per common share using the two-class method. Net income allocated to participating securities for the period includes dividend equivalents paid to holders of participating securities plus a proportionate share of undistributed net income allocable to participating securities for the period.

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