Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Marketable Securities [Line Items]
AFS securities	$ 856,266	$ 1,384,482
Asset Pledged as Collateral [Member]
Marketable Securities [Line Items]
AFS securities	220,029	697,591
Asset Pledged as Collateral [Member] | FRB of Kansas City borrowings [Member]
Marketable Securities [Line Items]
AFS securities	111,281	519,195
Asset Pledged as Collateral [Member] | Public Unit Deposits [Member]
Marketable Securities [Line Items]
AFS securities	$ 108,748	$ 178,396