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Financial Instruments with Off-Balance-Sheet Risk (Schedule of Financial Instruments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Commitments to extend credit $ 27,558 $ 19,939
Unfunded commitments under lines of credit 146,202 121,609
Commercial and standby letters of credit $ 8,139 $ 6,132