Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Current, Federal	$ 22,030	$ 26,007	$ 38,127
Current, State	4,742	3,512	4,734
Current income tax expense	26,772	29,519	42,861
Deferred, Federal	(456)	(5,956)	712
Deferred, State	95	1,416	210
Deferred income tax expense	(361)	(4,540)	922
Income tax expense	$ 26,411	$ 24,979	$ 43,783