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Loans (Details 4) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment $ 881,520 $ 844,157 $ 844,460
Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 870,678 828,590  
Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 2,851 7,757  
Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 7,991 7,810  
Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Commercial, Financial And Agricultural Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 80,796 96,688 108,006
Commercial, Financial And Agricultural Loan [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 80,637 96,507  
Commercial, Financial And Agricultural Loan [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 159 181  
Commercial, Financial And Agricultural Loan [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Commercial, Financial And Agricultural Loan [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 100,061 95,282 89,250
Construction Loans [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 100,056 95,282  
Construction Loans [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 5  
Construction Loans [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Construction Loans [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 44,987 43,928 49,215
Residential Mortgage [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 44,451 43,240  
Residential Mortgage [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 315 190  
Residential Mortgage [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 221 498  
Residential Mortgage [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Commercial Real Estate [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 620,130 573,258 561,932
Commercial Real Estate [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 611,406 559,982  
Commercial Real Estate [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 2,157 7,270  
Commercial Real Estate [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 6,567 6,006  
Commercial Real Estate [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 27,233 26,442 27,618
Home Equity Line of Credit [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 25,822 25,041  
Home Equity Line of Credit [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 215 95  
Home Equity Line of Credit [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 1,196 1,306  
Home Equity Line of Credit [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment  
Consumer Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 8,313 8,559 $ 8,439
Consumer Portfolio Segment [Member] | Pass [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 8,306 8,538  
Consumer Portfolio Segment [Member] | Special Mention [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 21  
Consumer Portfolio Segment [Member] | Substandard [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment 7  
Consumer Portfolio Segment [Member] | Doubtful [Member]      
Financing Receivable, Past Due [Line Items]      
Loans held-for-investment