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Loans and Related Allowance for Credit Losses (Troubled Debt Restructurings on Financing Receivables) (Details)
$ in Thousands
6 Months Ended 12 Months Ended 15 Months Ended
Jun. 30, 2020
USD ($)
contract
Jun. 30, 2019
USD ($)
loan
Dec. 31, 2019
USD ($)
contract
Jun. 30, 2020
USD ($)
loan
Financing Receivable, Modifications [Line Items]        
Financing Receivable, Modifications, Number of Contracts 8 1 8 0
Financing Receivable, Modifications, Pre-Modification Recorded Investment   $ 306    
Financing Receivable, Modifications, Post-Modification Recorded Investment   326    
Financing Receivable, Modifications, Recorded Investment $ 679 $ 324 $ 703 $ 679
Commercial Loan [Member] | Real Estate Portfolio Segment [Member] | Accruing Troubled Debt Restructurings [Member]        
Financing Receivable, Modifications [Line Items]        
Financing Receivable, Modifications, Number of Contracts 1 1 1  
Financing Receivable, Modifications, Pre-Modification Recorded Investment   $ 306    
Financing Receivable, Modifications, Post-Modification Recorded Investment   326    
Financing Receivable, Modifications, Recorded Investment $ 302 $ 324 $ 306 302
Mortgage Loan [Member] | Consumer Portfolio Segment [Member] | Accruing Troubled Debt Restructurings [Member]        
Financing Receivable, Modifications [Line Items]        
Financing Receivable, Modifications, Number of Contracts | contract 7   7  
Financing Receivable, Modifications, Recorded Investment $ 377   $ 397 $ 377