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Loans - Major Classifications - Loan Concentrations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Aug. 20, 2018
Loans      
Loans     $ 227.6
Real Estate Portfolio Segment [Member]      
Loans      
Loans receivable as a percentage of total portfolio 75.40% 77.90%