Allowance for Credit Losses (Age Analysis Of Past Due Loans Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 5,413	$ 7,425
Current	902,880	838,472
Total Loans Receivables	908,293	845,897
Loans Receivable >90 Days and Accruing		54
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,751	2,031
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	433	501
Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	3,229	4,893
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,909
Current	101,184
Total Loans Receivables	103,093	93,959
Residential Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,063
Residential Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	261
Residential Mortgage [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	585
Residential Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		2,384
Current		91,568
Total Loans Receivables		93,952
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		887
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		349
Residential Mortgage (Less Acquired With Credit Deterioration) [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		1,148
Acquired Residential Mortgage With Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		7
Total Loans Receivables		7
Acquired Residential Mortgage With Credit Deterioration [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		7
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,137	1,347
Current	522,861	483,105
Total Loans Receivables	523,998	484,452
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	177	221
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	960	1,126
Acquired Commercial Mortgage With Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		416
Current	674
Total Loans Receivables	674	416
Acquired Commercial Mortgage With Credit Deterioration [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		416
Commercial Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,620	2,048
Current	139,190	127,487
Total Loans Receivables	140,810	129,535
Commercial Term [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	354	381
Commercial Term [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	172	13
Commercial Term [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,094	1,654
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		514
Current	81,297	74,500
Total Loans Receivables	81,297	75,014
Commercial Construction [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		514
Consumer: Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	633	401
Current	52,577	56,443
Total Loans Receivables	53,210	56,844
Consumer: Home Equity [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	152	15
Consumer: Home Equity [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	481	386
Consumer: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	114	308
Current	5,097	5,369
Total Loans Receivables	5,211	5,677
Loans Receivable >90 Days and Accruing		54
Consumer: Other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	5	13
Consumer: Other [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		139
Consumer: Other [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 109	$ 156