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Commitments and Contingent Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Commitments to Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commercial real estate $ 122,479 $ 102,015
Commercial operating 308,393 298,657
Home equity 38,933 43,026
Other 103,912 110,226
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Asset $ 573,717 553,924
Number of expected days to fund commitments ninety days  
Financial Standby Letter of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Asset $ 11,535 $ 10,183
Period when letters of credit expire one year or less