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Loans (Narrative) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
contract
Sep. 30, 2020
USD ($)
contract
Sep. 30, 2019
USD ($)
contract
Dec. 31, 2019
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of TDR contracts | contract   10 1  
Troubled debt restructurings   $ 23,600   $ 4,200
Commercial Real Estate One [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of TDR contracts | contract   7    
Troubled debt restructurings   $ 20,100    
Commercial Real Estate One [Member] | Interest Only [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings   $ 16,500    
Period for interest-only at reduced rate   3 years    
Commercial Real Estate One [Member] | Restructured To Amortize And Payout [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings   $ 2,100    
Commercial Real Estate One [Member] | Restructured To Amortize And Payout [Member] | Minimum [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Pay out period   10 years    
Commercial Real Estate One [Member] | Advance For Capital Expenditures [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings   $ 1,500    
Period for interest-only at reduced rate   3 years    
Commercial Real Estate Two [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of TDR contracts | contract   2    
Troubled debt restructurings   $ 165    
Period for interest-only at reduced rate   2 years    
Impairment analysis performed and specific reserve   $ 4    
Commercial Real Estate [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of TDR contracts | contract   9    
Commercial [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of TDR contracts | contract 0 1 1  
Troubled debt restructurings $ 1,900 $ 81 $ 1,900  
Impairment analysis performed and specific reserve   $ 1,300