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Other Borrowings (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Short-term Debt [Line Items]    
Reverse repurchase agreements $ 5,000,000  
FHLBA additional credit 34,779,000  
Borrowed amount from FHLBA 46,311,000  
Unsecured Federal Funds Outstanding Amount 0 $ 0
Community Bankers Bank [Member]    
Short-term Debt [Line Items]    
Unsecured federal fund lines 13,000,000  
Available credit 7,635,000  
Zions Bank [Member]    
Short-term Debt [Line Items]    
Unsecured federal fund lines 4,000,000  
PNC Bank [Member]    
Short-term Debt [Line Items]    
Unsecured federal fund lines 6,000,000  
Suntrust Bank [Member]    
Short-term Debt [Line Items]    
Unsecured federal fund lines 3,000,000  
FHLBA [Member]    
Short-term Debt [Line Items]    
Available credit $ 177,112,000  
Maximum [Member]    
Short-term Debt [Line Items]    
Period allowed to exchange securities pledged as collateral for funds 90 days  
Minimum [Member]    
Short-term Debt [Line Items]    
Period allowed to exchange securities pledged as collateral for funds 30 days