Earnings Per Common Share (Schedule Of Reconciliation Of Net Income To Net Income Available To Common Shareholders) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	May 31, 2022	Feb. 28, 2022	Nov. 30, 2021	May 31, 2021	Feb. 28, 2021	Nov. 30, 2020	May 31, 2022	May 31, 2021
Earnings Per Common Share [Abstract]
Net income	$ 14,480	$ 19,508	$ 18,555	$ 21,006	$ 17,191	$ 23,623	$ 52,543	$ 61,820
Less: Net income allocated to participating securities	(56)			(73)			(193)	(247)
Net income available to common shareholders	$ 14,424			$ 20,933			$ 52,350	$ 61,573