Summary Of Significant Accounting Policies (Narrative) (Details)	9 Months Ended
	Sep. 30, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of subsidiaries | item	1
Number of days for accrual of interest on the payment of principal or interest	90 days
Residential Mortgage Loans [Member]
Summary of Significant Accounting Policies [Line Items]
Foreclosed real estate, net of allowance	$ 0
Mortgage Servicing Rights [Member] | Residential Mortgage Loans [Member]
Summary of Significant Accounting Policies [Line Items]
Mortgage loans serviced for third parties	96,268,000	$ 115,620,000
Total Consumer Related Loans [Member] | Residential Mortgage Loans [Member]
Summary of Significant Accounting Policies [Line Items]
Loans in process of forclosure amount	$ 209,000
Core Deposits Intangible Assets [Member]
Summary of Significant Accounting Policies [Line Items]
Intangible assets, amortization period	10 years