Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Current, Federal	$ 17,610	$ 22,030	$ 26,007
Current, State	4,068	4,742	3,512
Current income tax expense	21,678	26,772	29,519
Deferred, Federal	(4,857)	(456)	(5,956)
Deferred, State	(731)	95	1,416
Deferred income tax expense	(5,588)	(361)	(4,540)
Income tax expense	$ 16,090	$ 26,411	$ 24,979