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Loans - Nonaccrual Loans Segregated by Class of Loan (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans $ 4,666 $ 5,246
Residential Mortgage Loans [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 1,040 1,613
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 1,040 1,613
Commercial Loans [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 2,969 3,002
Commercial Loans [Member] | Real Estate [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 2,336 2,343
Commercial Loans [Member] | Lines of Credit [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 111 68
Commercial Loans [Member] | Other Commercial and Industrial [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 522 591
Consumer Loans [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 657 631
Consumer Loans [Member] | Home Equity and Junior Liens [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans 429 480
Consumer Loans [Member] | Other Consumer [Member]    
Nonaccrual loans, Segregated by class of loans [Abstract]    
Nonaccrual status loans $ 228 $ 151