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Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Sep. 30, 2019
Marketable Securities [Abstract]    
Public unit deposits $ 307,875 $ 381,143
Repurchase agreements 108,000 108,271
Federal Reserve Bank of Kansas City (FRB of Kansas City) 6,109 6,636
Total securities pledged as collateral $ 421,984 $ 496,050