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Loans, Allowance For Loan Losses And OREO (Narrative) (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
contract
loan
item
Mar. 31, 2020
contract
Dec. 31, 2020
contract
item
Financing Receivable, Modifications [Line Items]      
Loan modifications that would have been classified as TDRs | contract 0 0  
Loan modifications classified as TDRs | contract 0 0  
Outstanding commitments to disburse additional funds on TDR's | contract 0   0
Consumer mortgage loan secured by residential real estate | $ $ 0    
Principal balance | $ $ 90,000,000    
Number of loans modified 191    
Residential [Member]      
Financing Receivable, Modifications [Line Items]      
Number of real estate properties held | item 0   0
Modified Loans [Member]      
Financing Receivable, Modifications [Line Items]      
Principal balance | $ $ 6,120,000.00    
Number of loans modified 5    
Modified Loans One [Member]      
Financing Receivable, Modifications [Line Items]      
Number of loans modified 5    
Modified Loans Two [Member]      
Financing Receivable, Modifications [Line Items]      
Number of loans modified 0    
Covid-19 [Member] | Loan Portfolio [Member] | Modified Loans [Member]      
Financing Receivable, Modifications [Line Items]      
Percent of total loan portfolio 1.00%