Income Taxes (Components Of Net Deferred Income Tax (Liabilities) Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Deferred income tax assets:
Unrealized loss on interest rate swaps	$ 12,916	$ 8,041
ACL	6,553	1,938
Lease liabilities	3,590	0
Salaries, deferred compensation and employee benefits	1,622	1,579
ESOP compensation	1,360	1,288
Low income housing partnerships	655	792
Net purchase discounts related to acquired loans	577	991
Other	2,717	2,918
Gross deferred income tax assets	29,990	17,547
Valuation allowance	(1,808)	(1,823)
Gross deferred income tax asset, net of valuation allowance	28,182	15,724
Deferred income tax liabilities:
FHLB stock dividends	15,699	16,009
Unrealized gain on AFS securities	7,617	3,258
Premises and equipment	4,625	3,546
Lease right-of-use assets	3,588	0
Deposit intangible	1,475	1,978
ACL	2,388	3,018
Other	970	2,197
Gross deferred income tax liabilities	36,362	30,006
Net deferred tax liabilities	$ 8,180	$ 14,282