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Financial Instruments With Off-Balance-Sheet Risk (Summary Of Financial Instruments With Contract Amounts Representing Credit Risk) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Standby Letters of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair value off balance sheet risks $ 3,552 $ 3,469
Commitments to Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair value off balance sheet risks $ 152,834 $ 134,186