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Loans and Related Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Impaired [Line Items]    
Average Recorded Investment, Total $ 4,497 $ 4,168
Interest Income Recognized, Total 36 84
Cash Basis Interest Income, Total 82 88
Commercial, Financial and Agricultural [Member] | Commercial Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 234 549
Impaired Loans with No Allowance: Interest Income Recognized 0 22
Impaired Loans with No Allowance: Cash Basis Interest Income 0 15
Average Recorded Investment, Total 234 549
Interest Income Recognized, Total 0 22
Cash Basis Interest Income, Total 0 15
Commercial Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 2,291 1,058
Impaired Loans with No Allowance: Interest Income Recognized 20 45
Impaired Loans with No Allowance: Cash Basis Interest Income 38 28
Average Recorded Investment, Total 2,291 1,058
Interest Income Recognized, Total 20 45
Cash Basis Interest Income, Total 38 28
Construction Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment   14
Impaired Loans with No Allowance: Interest Income Recognized 0 0
Impaired Loans with No Allowance: Cash Basis Interest Income 0 0
Average Recorded Investment, Total   14
Interest Income Recognized, Total 0 0
Cash Basis Interest Income, Total 0 0
Mortgage Loan [Member] | Consumer Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 860 1,238
Impaired Loans with No Allowance: Interest Income Recognized 16 17
Impaired Loans with No Allowance: Cash Basis Interest Income 44 45
Impaired Loans with an Allowance: Average Recorded Investment 98 0
Impaired Loans with an Allowance: Interest Income Recognized 0 0
Impaired Loans with an Allowance: Cash Basis Interest Income 0 0
Average Recorded Investment, Total 958 1,238
Interest Income Recognized, Total 16 17
Cash Basis Interest Income, Total 44 45
Personal Loan [Member] | Consumer Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 2 16
Impaired Loans with No Allowance: Interest Income Recognized 0 0
Impaired Loans with No Allowance: Cash Basis Interest Income 0 0
Average Recorded Investment, Total 2 16
Interest Income Recognized, Total 0 0
Cash Basis Interest Income, Total 0 0
Acquired with Credit Deterioration [Member] | Commercial Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Average Recorded Investment, Total 352 455
Interest Income Recognized, Total 0 0
Cash Basis Interest Income, Total 0 0
Acquired with Credit Deterioration [Member] | Construction Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 352 455
Impaired Loans with No Allowance: Interest Income Recognized 0 0
Impaired Loans with No Allowance: Cash Basis Interest Income 0 0
Acquired with Credit Deterioration [Member] | Mortgage Loan [Member] | Consumer Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 660 838
Impaired Loans with No Allowance: Interest Income Recognized 0 0
Impaired Loans with No Allowance: Cash Basis Interest Income 0 0
Average Recorded Investment, Total 660 838
Interest Income Recognized, Total 0 0
Cash Basis Interest Income, Total $ 0 $ 0