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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
Oct. 09, 2018
Dec. 12, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Summary of Significant Accounting Policies [Line Items]          
Number of days for accrual of interest on the payment of principal or interest     90 days    
Foreclosed real estate, net of allowance     $ 1,767   $ 216
Stock dividend, rate   5.00% 5.00% 5.00%  
Subsequent Event [Member]          
Summary of Significant Accounting Policies [Line Items]          
Stock dividend, rate 5.00%        
Residential Mortgages [Member]          
Summary of Significant Accounting Policies [Line Items]          
Foreclosed real estate, net of allowance     $ 32   96
Residential Mortgages [Member] | Mortgage Servicing Rights [Member]          
Summary of Significant Accounting Policies [Line Items]          
Mortgage loans serviced for third parties     94,004   $ 70,780
Total Consumer Related Loans [Member] | Residential Mortgages [Member]          
Summary of Significant Accounting Policies [Line Items]          
Loans in process of forclosure amount     $ 18    
Core Deposits Intangible Assets [Member]          
Summary of Significant Accounting Policies [Line Items]          
Intangible assets, amortization period     10 years