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Allowance For Credit Losses (Narrative) (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
contract
Mar. 31, 2020
USD ($)
contract
Dec. 31, 2020
USD ($)
Financing Receivable, Impaired [Line Items]      
Threshold Period for Discontinuance of Interest Accrual 90 days    
Financing Receivable, Nonaccrual, Interest Income $ 100,000 $ 100,000  
Impaired Financing Receivable, Interest Income, Interest Forgone $ 100,000 100,000  
Financing Receivable, Threshold Period Past Due 30 days    
Allowance for credit losses allocated to troubled debt $ 1,600,000   $ 1,600,000
Commitment to lend to troubled debt 0    
Increase in provision for credit losses for TDRs 100,000 100,000  
Charge-offs related to TDRs $ 200,000 $ 200,000  
Number of TDRs that defaulted | contract 0 0  
Financing Receivable, Troubled Debt Restructuring $ 25,354,000   $ 26,142,000
Payment Deferral | COVID-19 | Consumer Borrower      
Financing Receivable, Impaired [Line Items]      
Loan Restructuring, Trial Modifications, Amount 145,000,000    
Loan Restructuring, Trial Modifications, Period End Amount 3,000,000    
Loan Restructuring, Trial Modifications, Resumed Payment, Amount 142,000,000    
Financing Receivable, Troubled Debt Restructuring 4,000,000    
Payment Deferral | COVID-19 | Commercial Borrower      
Financing Receivable, Impaired [Line Items]      
Loan Restructuring, Trial Modifications, Amount 480,000,000    
Loan Restructuring, Trial Modifications, Period End Amount 115,000,000    
Loan Restructuring, Trial Modifications, Resumed Payment, Amount 365,000,000    
Payment Deferral | COVID-19 | Hotels      
Financing Receivable, Impaired [Line Items]      
Loan Restructuring, Trial Modifications, Period End Amount $ 105,000,000    
Residential real estate      
Financing Receivable, Impaired [Line Items]      
Threshold period past due for write-off of financing receivable 120 days    
Commercial Industrial Loans And Commercial Real Estate      
Financing Receivable, Impaired [Line Items]      
Threshold period past due for write-off of financing receivable 120 days    
Consumer      
Financing Receivable, Impaired [Line Items]      
Threshold period past due for write-off of financing receivable 180 days