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Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Sep. 30, 2018
Marketable Securities [Abstract]    
Public unit deposits $ 381,143 $ 515,553
Repurchase agreements 108,271 108,360
FRB of Kansas City 6,636 9,529
Total securities pledged as collateral $ 496,050 $ 633,442