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Financial Instruments With Off-Balance Sheet Risk (Schedule of Financial Instrument with Off-Balance Sheet Credit Risk) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Notional amounts of financial instrument with off-balance sheet credit risk $ 235,617 $ 232,772
Commitments To Originate Loans [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Notional amounts of financial instrument with off-balance sheet credit risk 31,920 29,388
Letters Of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Notional amounts of financial instrument with off-balance sheet credit risk 1,682 1,463
Unadvanced Portions Of Loans [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Notional amounts of financial instrument with off-balance sheet credit risk $ 202,015 $ 201,921