Allowance for Credit Losses (Age Analysis Of Past Due Loans Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 7,488	$ 6,030
Current	916,461	928,941
Total Loans Receivables	923,949	934,971
Loans Receivable >90 Days and Accruing		233
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,735	1,110
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	816	1,923
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	4,937	2,997
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	2,671
Current	90,915
Total Loans Receivables	93,586	99,932
Residential Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,146
Residential Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	494
Residential Mortgage [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,031
Residential Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		3,253
Current		96,679
Total Loans Receivables		99,932
Loans Receivable >90 Days and Accruing		130
Residential Mortgage (Less Acquired With Credit Deterioration) [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		666
Residential Mortgage (Less Acquired With Credit Deterioration) [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		1,742
Residential Mortgage (Less Acquired With Credit Deterioration) [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		845
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,350	840
Current	525,809	534,739
Total Loans Receivables	527,159	535,579
Loans Receivable >90 Days and Accruing		103
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	540
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	112
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	698	840
Acquired Commercial Mortgage With Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	521	156
Total Loans Receivables	521	156
Commercial Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,630	1,014
Current	172,815	165,321
Total Loans Receivables	174,445	166,335
Commercial Term [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		20
Commercial Term [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	113	37
Commercial Term [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,517	957
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,558
Current	74,015	76,302
Total Loans Receivables	75,573	76,302
Commercial Construction [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	96
Commercial Construction [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,462
Consumer: Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	173	789
Current	47,921	50,747
Total Loans Receivables	48,094	51,536
Consumer: Home Equity [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	30	398
Consumer: Home Equity [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		144
Consumer: Home Equity [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	143	247
Consumer: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	106	134
Current	4,465	4,997
Total Loans Receivables	4,571	5,131
Consumer: Other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	19	26
Consumer: Other [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1
Consumer: Other [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 86	$ 108