Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	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	$ 119	$ 216
Residential Mortgages [Member]
Summary of Significant Accounting Policies [Line Items]
Foreclosed real estate, net of allowance	0	96
Residential Mortgages [Member] | Mortgage Servicing Rights [Member]
Summary of Significant Accounting Policies [Line Items]
Mortgage loans serviced for third parties	77,087	$ 70,780
Total Consumer Related Loans [Member] | Residential Mortgages [Member]
Summary of Significant Accounting Policies [Line Items]
Loans in process of forclosure amount	$ 280
Core Deposits Intangible Assets [Member]
Summary of Significant Accounting Policies [Line Items]
Intangible assets, amortization period	10 years