Allowance for Credit Losses (Age Analysis Of Past Due Loans Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 6,950	$ 10,189
Current	809,413	807,340
Total Loans Receivables	816,363	817,529
Loans Receivable >90 Days and Accruing			$ 164
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,425	3,468
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	716	1,661
Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	4,809	5,060
Residential Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	2,260	1,593
Current	85,336	85,977
Total Loans Receivables	87,596	87,570
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	1,238	728
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	467	374
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	555	491
Acquired Residential Mortgage With Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	11	11
Total Loans Receivables	11	11
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	11	11
Commercial Mortgage (Less Acquired With Credit Deterioration) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	411	4,133
Current	459,923	459,679
Total Loans Receivables	460,334	463,812
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	184	1,202
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	227	762
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		2,169
Acquired Commercial Mortgage With Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	611	1,145
Current	522	529
Total Loans Receivables	1,133	1,674
Acquired Commercial Mortgage With Credit Deterioration [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		389
Acquired Commercial Mortgage With Credit Deterioration [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		83
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	611	673
Commercial Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,872	1,147
Current	112,258	122,028
Total Loans Receivables	114,130	123,175
Commercial Term [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		747
Commercial Term [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	22	377
Commercial Term [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,850	23
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,248	1,354
Current	83,937	71,401
Total Loans Receivables	85,185	72,755
Commercial Construction [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		112
Commercial Construction [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	1,248	1,242
Consumer: Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	322	563
Current	61,597	61,997
Total Loans Receivables	61,919	62,560
Consumer: Home Equity [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	3	263
Consumer: Home Equity [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	319	300
Consumer: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	215	243
Current	5,840	5,729
Total Loans Receivables	6,055	5,972
Consumer: Other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		27
Consumer: Other [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables		65
Consumer: Other [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans receivables	$ 215	$ 151