Loans And Credit Quality (Troubled Debt Restructuring Outstanding) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Total Modifications	$ 2,613	$ 2,681
Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	2,597	2,663
Non-Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	16	18
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	1,142	1,188
Commercial real estate [Member] | Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	1,142	1,188
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	233	233
Commercial [Member] | Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	233	233
Commercial [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	260	260
Commercial [Member] | Construction [Member] | Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	260	260
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	978	1,000
Residential real estate [Member] | Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	962	982
Residential real estate [Member] | Non-Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Total Modifications	$ 16	$ 18