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Loans and Related Allowance for Credit Losses (Troubled Debt Restructurings on Financing Receivables) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
item
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Recorded Investment $ 703,000 $ 445,000
Restructured Loan [Member] | Accruing Troubled Debt Restructurings [Member]    
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Number of Contracts | item 2 1
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 315,000 $ 153,000
Financing Receivable, Modifications, Post-Modification Recorded Investment 335,000 153,000
Financing Receivable, Modifications, Recorded Investment $ 311,000 $ 147,000
Restructured Loan [Member] | Commercial Loan [Member] | Real Estate Portfolio Segment [Member] | Accruing Troubled Debt Restructurings [Member]    
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Number of Contracts | item 1  
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 306,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment 326,000  
Financing Receivable, Modifications, Recorded Investment $ 306,000  
Restructured Loan [Member] | Mortgage Loan [Member] | Consumer Portfolio Segment [Member] | Accruing Troubled Debt Restructurings [Member]    
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Number of Contracts | item 1 1
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 9,000 $ 153,000
Financing Receivable, Modifications, Post-Modification Recorded Investment 9,000 153,000
Financing Receivable, Modifications, Recorded Investment $ 5,000 $ 147,000