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Cash and Due from Banks and Interest Bearing Deposits (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Federal Reserve [Member]    
Cash and Due from Banks and Interest Bearing Deposits [Abstract]    
Balance requirements $ 78.0 $ 74.7
Cash accounts which exceeded federally insured limits 203.6  
US Bank [Member]    
Cash and Due from Banks and Interest Bearing Deposits [Abstract]    
Cash accounts which exceeded federally insured limits 23.2  
Fifth Third Bank [Member]    
Cash and Due from Banks and Interest Bearing Deposits [Abstract]    
Cash accounts which exceeded federally insured limits 0.9  
Federal Home Loan Bank [Member]    
Cash and Due from Banks and Interest Bearing Deposits [Abstract]    
Cash accounts which exceeded federally insured limits $ 2.4