Loans And Credit Quality (Activity In Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 8,366	$ 7,546	$ 8,022	$ 7,412
Recoveries	1		25	4
Provision for loan losses	650	95	970	225
Ending balance	9,017	7,641	9,017	7,641
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,353	3,265	3,221	3,248
Recoveries			24
Provision for loan losses	221	(45)	329	(28)
Ending balance	3,574	3,220	3,574	3,220
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	817	598	770	574
Recoveries				4
Provision for loan losses	(55)	45	(8)	65
Ending balance	762	643	762	643
Commercial [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	121	103	121	94
Provision for loan losses	(8)	2	(8)	11
Ending balance	113	105	113	105
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,627	3,198	3,488	3,179
Recoveries	1		1
Provision for loan losses	(10)	67	129	86
Ending balance	3,618	3,265	3,618	3,265
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	18	21	19	19
Provision for loan losses	(2)	3	(3)	5
Ending balance	16	24	16	24
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	430	361	403	298
Provision for loan losses	504	23	531	86
Ending balance	$ 934	$ 384	$ 934	$ 384