Loan Quality And Allowance For Loan Losses (Allowance For Loan Losses, By Loan Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	$ 11,075	$ 10,086
Charge-offs	(36)	(111)
Recoveries	119	67
Provision	120	300
Allowance, Ending Balance	11,278	10,342
Loans evaluated for allowance individually			$ 15,100	$ 14,683
Loans evaluated for allowance collectively			888,429	879,190
Total Loans			903,529	893,873
Allowance established for loan evaluated collectively			11,278	11,075
Total Allowance	11,075	10,086	11,278	11,075
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans			215,957	218,783
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	224	194
Provision	50	5
Allowance, Ending Balance	274	199
Loans evaluated for allowance individually			478	480
Loans evaluated for allowance collectively			10,460	8,495
Total Loans			10,938	8,975
Allowance established for loan evaluated collectively			274	224
Total Allowance	224	194	274	224
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	6,109	5,649
Charge-offs		(3)
Provision	17	535
Allowance, Ending Balance	6,126	6,181
Loans evaluated for allowance individually			13,946	13,523
Loans evaluated for allowance collectively			383,375	377,061
Total Loans			397,321	390,584
Allowance established for loan evaluated collectively			6,126	6,109
Total Allowance	6,109	5,649	6,126	6,109
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,893	1,519
Charge-offs		(63)
Recoveries	102	15
Provision	(11)	39
Allowance, Ending Balance	1,984	1,510
Loans evaluated for allowance collectively			274,722	270,826
Total Loans			274,722	270,826
Allowance established for loan evaluated collectively			1,984	1,893
Total Allowance	1,893	1,519	1,984	1,893
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	100	102
Charge-offs	(28)	(42)
Recoveries	16	20
Provision	11	19
Allowance, Ending Balance	99	99
Loans evaluated for allowance collectively			4,591	4,705
Total Loans			4,591	4,705
Allowance established for loan evaluated collectively			99	100
Total Allowance	100	102	99	100
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,321	1,325
Provision	53	(285)
Allowance, Ending Balance	1,374	1,040
Allowance established for loan evaluated collectively			1,374	1,321
Total Allowance	1,321	1,325	1,374	1,321
First Liens [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	1,105	989
Charge-offs	(8)	(3)
Recoveries	1	32
Provision	2	(21)
Allowance, Ending Balance	1,100	997
Loans evaluated for allowance individually			624	628
Loans evaluated for allowance collectively			165,940	167,942
Total Loans			166,564	168,570
Allowance established for loan evaluated collectively			1,100	1,105
Total Allowance	1,105	989	1,100	1,105
Junior Liens & Lines Of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	323	308
Provision	(2)	8
Allowance, Ending Balance	321	316
Loans evaluated for allowance individually			52	52
Loans evaluated for allowance collectively			49,341	50,161
Total Loans			49,393	50,213
Allowance established for loan evaluated collectively			321	323
Total Allowance	$ 323	$ 308	$ 321	$ 323