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Loans and Related Allowance for Loan Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Impaired [Line Items]    
Impaired Loans: Related Allowance $ 2  
Recorded Investment, Total 5,189 $ 3,586
Unpaid Principal Balance, Total 7,134 5,613
Commercial Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 3,483 1,206
Impaired Loans with No Allowance: Unpaid Principal Balance 3,580 1,304
Recorded Investment, Total 3,483 1,206
Unpaid Principal Balance, Total 3,580 1,304
Commercial Loan [Member] | Real Estate Portfolio Segment [Member] | Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 339 366
Impaired Loans with No Allowance: Unpaid Principal Balance 386 395
Recorded Investment, Total 339 366
Unpaid Principal Balance, Total 386 395
Construction Loan [Member] | Real Estate Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Unpaid Principal Balance 894 1,054
Unpaid Principal Balance, Total 894 1,054
Mortgage Loan [Member] | Consumer Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 666 1,296
Impaired Loans with No Allowance: Unpaid Principal Balance 1,396 2,006
Impaired Loans with an Allowance: Recorded Investment 78  
Impaired Loans with an Allowance: Unpaid Principal Balance 77  
Impaired Loans: Related Allowance 2  
Recorded Investment, Total 744 1,296
Unpaid Principal Balance, Total 1,473 2,006
Mortgage Loan [Member] | Consumer Portfolio Segment [Member] | Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 623 704
Impaired Loans with No Allowance: Unpaid Principal Balance 801 840
Recorded Investment, Total 623 704
Unpaid Principal Balance, Total $ 801 840
Personal Loan [Member] | Consumer Portfolio Segment [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment   14
Impaired Loans with No Allowance: Unpaid Principal Balance   14
Recorded Investment, Total   14
Unpaid Principal Balance, Total   $ 14