Loans and Allowance for Loan and Lease Losses (Allowance For Loan Losses And Recorded Investment In Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			$ 7,183				$ 6,168	$ 7,183	$ 6,168	$ 6,716
Charge-offs								(497)	(1,107)	(1,784)
Recoveries								595	252	171
Provisions	$ 100	$ 100	125	$ 550	$ 585	$ 395	340	325	1,870	1,065
Allowance for Loan Losses, Ending Balance	7,606			7,183				7,606	7,183	6,168
Allowance for loan losses: Ending balance: individually evaluated for impairment	529			858				529	858	503
Allowance for loan losses: Ending balance: collectively evaluated for impairment	7,077			6,325				7,077	6,325	5,665
Loans receivables, Ending Balance	910,404			813,924				910,404	813,924	736,513
Loans receivables: Ending balance: individually evaluated for impairment	10,788			5,222				10,788	5,222	4,573
Loans Receivable: Ending balance: collectively evaluated for impairment	898,755			807,471				898,755	807,471	730,609
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	861			1,231				861	1,231	1,331
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			379				317	379	317	653
Charge-offs								(20)	(25)	(36)
Recoveries								5		29
Provisions								59	87	(329)
Allowance for Loan Losses, Ending Balance	423			379				423	379	317
Allowance for loan losses: Ending balance: individually evaluated for impairment				1					1
Allowance for loan losses: Ending balance: collectively evaluated for impairment	423			378				423	378	317
Loans receivables, Ending Balance	41,893			37,608				41,893	37,608	33,411
Loans receivables: Ending balance: individually evaluated for impairment	260			140				260	140	115
Loans Receivable: Ending balance: collectively evaluated for impairment	41,633			37,468				41,633	37,468	33,296
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			1,580				1,393	1,580	1,393	1,393
Charge-offs								(25)	(820)	(130)
Recoveries								26	4	12
Provisions								214	1,003	118
Allowance for Loan Losses, Ending Balance	1,795			1,580				1,795	1,580	1,393
Allowance for loan losses: Ending balance: individually evaluated for impairment	136			6				136	6	51
Allowance for loan losses: Ending balance: collectively evaluated for impairment	1,659			1,574				1,659	1,574	1,342
Loans receivables, Ending Balance	188,033			172,518				188,033	172,518	160,261
Loans receivables: Ending balance: individually evaluated for impairment	4,434			60				4,434	60	127
Loans Receivable: Ending balance: collectively evaluated for impairment	183,599			172,458				183,599	172,458	160,134
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			4,323				3,552	4,323	3,552	3,925
Charge-offs								(322)	(216)	(1,569)
Recoveries								553	211	75
Provisions								(119)	776	1,121
Allowance for Loan Losses, Ending Balance	4,435			4,323				4,435	4,323	3,552
Allowance for loan losses: Ending balance: individually evaluated for impairment	293			711				293	711	429
Allowance for loan losses: Ending balance: collectively evaluated for impairment	4,142			3,612				4,142	3,612	3,123
Loans receivables, Ending Balance	515,012			446,524				515,012	446,524	369,464
Loans receivables: Ending balance: individually evaluated for impairment	4,847			3,246				4,847	3,246	2,970
Loans Receivable: Ending balance: collectively evaluated for impairment	509,610			442,436				509,610	442,436	365,563
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	555			842				555	842	931
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			144				153	144	153	33
Provisions								34	(9)	120
Allowance for Loan Losses, Ending Balance	178			144				178	144	153
Allowance for loan losses: Ending balance: individually evaluated for impairment	100			72				100	72
Allowance for loan losses: Ending balance: collectively evaluated for impairment	78			72				78	72	153
Loans receivables, Ending Balance	62,336			54,376				62,336	54,376	68,068
Loans receivables: Ending balance: individually evaluated for impairment	487			860				487	860
Loans Receivable: Ending balance: collectively evaluated for impairment	61,849			53,516				61,849	53,516	68,068
Commercial Portfolio [Member] | Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			1				1	1	1	2
Provisions								(1)		(1)
Allowance for Loan Losses, Ending Balance				1					1	1
Allowance for loan losses: Ending balance: collectively evaluated for impairment				1					1	1
Loans receivables, Ending Balance	229			425				229	425	727
Loans Receivable: Ending balance: collectively evaluated for impairment	229			425				229	425	727
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			541				534	541	534	450
Charge-offs								(102)	(4)	(35)
Recoveries								4	26	44
Provisions								(15)	(15)	75
Allowance for Loan Losses, Ending Balance	428			541				428	541	534
Allowance for loan losses: Ending balance: individually evaluated for impairment				68					68	23
Allowance for loan losses: Ending balance: collectively evaluated for impairment	428			473				428	473	511
Loans receivables, Ending Balance	99,033			99,457				99,033	99,457	100,665
Loans receivables: Ending balance: individually evaluated for impairment	760			916				760	916	1,361
Loans Receivable: Ending balance: collectively evaluated for impairment	97,967			98,152				97,967	98,152	98,904
Residential Portfolio [Member] | Receivables Acquired with Deteriorated Credit Quality [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	306			389				306	389	400
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			3				12	3	12	35
Charge-offs								(28)	(42)	(14)
Recoveries								7	11	11
Provisions								21	22	(20)
Allowance for Loan Losses, Ending Balance	3			3				3	3	12
Allowance for loan losses: Ending balance: collectively evaluated for impairment	3			3				3	3	12
Loans receivables, Ending Balance	3,868			3,016				3,868	3,016	3,917
Loans Receivable: Ending balance: collectively evaluated for impairment	3,868			3,016				3,868	3,016	3,917
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance			$ 212				$ 206	212	206	225
Provisions								132	6	(19)
Allowance for Loan Losses, Ending Balance	344			212				344	212	206
Allowance for loan losses: Ending balance: collectively evaluated for impairment	$ 344			$ 212				$ 344	$ 212	$ 206