Cash and Due from Banks and Interest Bearing Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Federal Reserve [Member]
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Balance requirements		$ 78.0
Cash accounts which exceeded federally insured limits	$ 280.7
US Bank [Member]
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Cash accounts which exceeded federally insured limits	21.3
Fifth Third Bank [Member]
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Cash accounts which exceeded federally insured limits	0.4
Federal Home Loan Bank [Member]
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Cash accounts which exceeded federally insured limits	$ 3.3