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Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
Loan
contract
Dec. 31, 2018
USD ($)
Loan
contract
Dec. 31, 2017
USD ($)
contract
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 3,282,000 $ 7,741,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment 3,181,000 7,990,000  
Financing Receivable, Modifications, Recorded Investment $ 2,238,000 $ 7,020,000  
Financing Receivable, Modifications, Number of Contracts | Loan 0 0  
Entity Loan Modification Program [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 43,000 $ 270,000 $ 7,322,000
Financing Receivable, Modifications, Post-Modification Recorded Investment 43,000 270,000 7,610,000
Financing Receivable, Modifications, Recorded Investment $ 43,000 $ 266,000 $ 7,574,000
Financing Receivable, Modifications, Number of Contracts | contract 2 1 10
Home Equity [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment   $ 14,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment   14,000  
Financing Receivable, Modifications, Recorded Investment   1,000  
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Entity Loan Modification Program [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 3,000   $ 4,110,000
Financing Receivable, Modifications, Post-Modification Recorded Investment 3,000   4,460,000
Financing Receivable, Modifications, Recorded Investment $ 3,000   $ 4,434,000
Financing Receivable, Modifications, Number of Contracts | contract 1   1
Commercial Portfolio [Member] | Commercial and Industrial [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 3,000 4,110,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment 3,000 4,460,000  
Financing Receivable, Modifications, Recorded Investment 3,000 4,302,000  
Commercial Portfolio [Member] | Commercial Real Estate [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment 2,562,000 2,940,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment 2,463,000 2,841,000  
Financing Receivable, Modifications, Recorded Investment 1,705,000 2,201,000  
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Entity Loan Modification Program [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment   270,000 $ 3,212,000
Financing Receivable, Modifications, Post-Modification Recorded Investment   270,000 3,150,000
Financing Receivable, Modifications, Recorded Investment   $ 266,000 $ 3,140,000
Financing Receivable, Modifications, Number of Contracts | contract   1 9
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment 40,000    
Financing Receivable, Modifications, Post-Modification Recorded Investment 40,000    
Financing Receivable, Modifications, Recorded Investment 40,000    
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] | Entity Loan Modification Program [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment 40,000    
Financing Receivable, Modifications, Post-Modification Recorded Investment 40,000    
Financing Receivable, Modifications, Recorded Investment $ 40,000    
Financing Receivable, Modifications, Number of Contracts | contract 1    
Residential Portfolio [Member] | Residential Mortgage [Member]      
Financing Receivable, Modifications [Line Items]      
Financing Receivable, Modifications, Pre-Modification Recorded Investment $ 677,000 $ 677,000  
Financing Receivable, Modifications, Post-Modification Recorded Investment 675,000 675,000  
Financing Receivable, Modifications, Recorded Investment $ 490,000 $ 516,000