Allowance For Loan Losses And Credit Quality Of Financing Receivables (Changes In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 5,590	$ 5,641
Charge-offs	(518)	(769)
Recoveries	333	82
Provision	1,291	636
Ending balance	6,696	5,590
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	85	231
Charge-offs	(227)	(19)
Recoveries	268	17
Provision	(16)	(144)
Ending balance	110	85
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	220	383
Provision	139	(163)
Ending balance	359	220
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	3,646	3,491
Charge-offs	(187)	(560)
Recoveries	37	41
Provision	436	674
Ending balance	3,932	3,646
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	784	903
Charge-offs	(67)	(165)
Recoveries	21	17
Provision	161	29
Ending balance	899	784
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	87	19
Charge-offs	(37)	(25)
Recoveries	7	7
Provision	(38)	86
Ending balance	19	87
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	768	614
Provision	609	154
Ending balance	$ 1,377	$ 768