Loan Quality And Allowance For Loan Losses (Allowance For Loan Losses, By Loan Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	$ 11,278	$ 10,342	$ 11,075	$ 10,086
Charge-offs	(36)	(2,042)	(72)	(2,153)
Recoveries	15	143	134	210
Provision	50	1,875	170	2,175
Allowance, Ending Balance	11,307	10,318	11,307	10,318
Loans evaluated for allowance individually					$ 12,842	$ 14,683
Loans evaluated for allowance collectively					888,572	879,190
Total Loans					901,414	893,873
Allowance established for loan evaluated collectively					11,307	11,075
Total Allowance	11,278	10,342	11,075	10,086	11,307	11,075
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans					212,943	218,783
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	274	199	224	194
Provision	7	6	57	11
Allowance, Ending Balance	281	205	281	205
Loans evaluated for allowance individually					473	480
Loans evaluated for allowance collectively					10,753	8,495
Total Loans					11,226	8,975
Allowance established for loan evaluated collectively					281	224
Total Allowance	274	199	224	194	281	224
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	6,126	6,181	6,109	5,649
Charge-offs	(5)	(1,951)	(5)	(1,954)
Recoveries		14		14
Provision	(69)	1,696	(52)	2,231
Allowance, Ending Balance	6,052	5,940	6,052	5,940
Loans evaluated for allowance individually					11,345	13,523
Loans evaluated for allowance collectively					375,439	377,061
Total Loans					386,784	390,584
Allowance established for loan evaluated collectively					6,052	6,109
Total Allowance	6,126	6,181	6,109	5,649	6,052	6,109
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,984	1,510	1,893	1,519
Charge-offs	(2)	(3)	(2)	(66)
Recoveries	4	106	106	121
Provision	37	(17)	26	22
Allowance, Ending Balance	2,023	1,596	2,023	1,596
Loans evaluated for allowance individually					100
Loans evaluated for allowance collectively					285,680	270,826
Total Loans					285,780	270,826
Allowance established for loan evaluated collectively					2,023	1,893
Total Allowance	1,984	1,510	1,893	1,519	2,023	1,893
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	99	99	100	102
Charge-offs	(24)	(42)	(52)	(84)
Recoveries	10	22	26	42
Provision	15	18	26	37
Allowance, Ending Balance	100	97	100	97
Loans evaluated for allowance collectively					4,681	4,705
Total Loans					4,681	4,705
Allowance established for loan evaluated collectively					100	100
Total Allowance	99	99	100	102	100	100
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,374	1,040	1,321	1,325
Provision	80	98	133	(187)
Allowance, Ending Balance	1,454	1,138	1,454	1,138
Allowance established for loan evaluated collectively					1,454	1,321
Total Allowance	1,374	1,040	1,321	1,325	1,454	1,321
First Liens [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,100	997	1,105	989
Charge-offs	(5)	(46)	(13)	(49)
Recoveries		1	1	33
Provision	(20)	71	(18)	50
Allowance, Ending Balance	1,075	1,023	1,075	1,023
Loans evaluated for allowance individually					818	628
Loans evaluated for allowance collectively					162,432	167,942
Total Loans					163,250	168,570
Allowance established for loan evaluated collectively					1,075	1,105
Total Allowance	1,100	997	1,105	989	1,075	1,105
Junior Liens & Lines Of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	321	316	323	308
Recoveries	1		1
Provision		3	(2)	11
Allowance, Ending Balance	322	319	322	319
Loans evaluated for allowance individually					106	52
Loans evaluated for allowance collectively					49,587	50,161
Total Loans					49,693	50,213
Allowance established for loan evaluated collectively					322	323
Total Allowance	$ 321	$ 316	$ 323	$ 308	$ 322	$ 323