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Loans and Allowance for Credit Losses (Troubled Debt Restructurings on Financing Receivables) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 4  
Premodification outstanding recorded investment $ 4,462  
Postmodification outstanding recorded investment 3,650  
Related allowance
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Related allowance
Residential Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 3  
Premodification outstanding recorded investment $ 2,310  
Postmodification outstanding recorded investment 2,119  
Related allowance
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 1  
Number of new contracts | contract 1  
Premodification outstanding recorded investment $ 2,152  
Postmodification outstanding recorded investment 1,531  
Related allowance
Commercial Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Related allowance
Consumer Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Related allowance