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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	3 Months Ended				6 Months Ended
	Feb. 28, 2019	Nov. 30, 2018	Feb. 28, 2018	Nov. 30, 2017	Feb. 28, 2019	Feb. 28, 2018
Earnings Per Common Share [Abstract]
Net income	$ 15,906	$ 13,279	$ 14,818	$ 12,630	$ 29,185	$ 27,448
Less: Net income allocated to participating securities	(94)		(96)		(181)	(178)
Net income available to common shareholders	$ 15,812		$ 14,722		$ 29,004	$ 27,270

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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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