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Loans And Leases (Recorded Investment In Nonperforming Loans By Class Of Loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans past due over 90 days still on accrual
Total nonaccrual and nonperforming loans 377 470
Single-Family Residential [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total nonaccrual and nonperforming loans 182 253
Purchased for Portfolio [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total nonaccrual and nonperforming loans 91 102
Nonaccrual [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total nonaccrual and nonperforming loans 377 470
Commercial [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total nonaccrual and nonperforming loans $ 104 $ 115