Loans and Allowance for Loan and Lease Losses (Allowance And Recorded Investment In Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	$ 7,666	$ 7,620	$ 7,606	$ 7,183
Charge-offs	(267)	(40)	(351)	(76)
Recoveries	790	33	809	381
Provisions		100	125	225
Allowance for Loan Losses, Ending Balance	8,189	7,713	8,189	7,713
Allowance for loan losses: Ending balance: individually evaluated for impairment	574	1,029	574	1,029	$ 529
Allowance for loan losses: Ending balance: collectively evaluated for impairment	7,615	6,684	7,615	6,684	7,077
Loans receivables, Ending Balance	1,036,479	862,307	1,036,479	862,307	910,404
Loans receivables: Ending balance: individually evaluated for impairment	7,688	5,517	7,688	5,517	10,788
Loans Receivable: Ending balance: collectively evaluated for impairment	1,026,809	855,893	1,026,809	855,893	898,755
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	1,982	897	1,982	897	861
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	391	364	423	379
Charge-offs	(91)		(167)
Recoveries		5		5
Provisions	120	35	164	20
Allowance for Loan Losses, Ending Balance	420	404	420	404
Allowance for loan losses: Ending balance: collectively evaluated for impairment	420	404	420	404	423
Loans receivables, Ending Balance	47,815	38,671	47,815	38,671	41,893
Loans receivables: Ending balance: individually evaluated for impairment	8	327	8	327	260
Loans Receivable: Ending balance: collectively evaluated for impairment	47,807	38,344	47,807	38,344	41,633
Commercial Portfolio [Member] \| Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	1,977	1,630	1,795	1,580
Charge-offs	(129)		(129)	(12)
Recoveries		3		7
Provisions	272	(5)	454	53
Allowance for Loan Losses, Ending Balance	2,120	1,628	2,120	1,628
Allowance for loan losses: Ending balance: individually evaluated for impairment	282		282		136
Allowance for loan losses: Ending balance: collectively evaluated for impairment	1,838	1,628	1,838	1,628	1,659
Loans receivables, Ending Balance	204,724	181,368	204,724	181,368	188,033
Loans receivables: Ending balance: individually evaluated for impairment	4,324		4,324		4,434
Loans Receivable: Ending balance: collectively evaluated for impairment	200,377	181,368	200,377	181,368	183,599
Commercial Portfolio [Member] \| Commercial and Industrial [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	23		23
Commercial Portfolio [Member] \| Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	4,653	4,715	4,435	4,323
Charge-offs		(30)		(30)
Recoveries	788	22	805	361
Provisions	(718)	274	(517)	327
Allowance for Loan Losses, Ending Balance	4,723	4,981	4,723	4,981
Allowance for loan losses: Ending balance: individually evaluated for impairment	238	893	238	893	293
Allowance for loan losses: Ending balance: collectively evaluated for impairment	4,485	4,088	4,485	4,088	4,142
Loans receivables, Ending Balance	575,956	482,141	575,956	482,141	515,012
Loans receivables: Ending balance: individually evaluated for impairment	2,261	3,651	2,261	3,651	4,847
Loans Receivable: Ending balance: collectively evaluated for impairment	572,229	477,917	572,229	477,917	509,610
Commercial Portfolio [Member] \| Commercial Real Estate [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	1,466	573	1,466	573	555
Commercial Portfolio [Member] \| Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	183	101	178	144
Charge-offs	(40)		(40)
Provisions	3	39	8	(4)
Allowance for Loan Losses, Ending Balance	146	140	146	140
Allowance for loan losses: Ending balance: individually evaluated for impairment	54	70	54	70	100
Allowance for loan losses: Ending balance: collectively evaluated for impairment	92	70	92	70	78
Loans receivables, Ending Balance	82,690	53,305	82,690	53,305	62,336
Loans receivables: Ending balance: individually evaluated for impairment	367	571	367	571	487
Loans Receivable: Ending balance: collectively evaluated for impairment	82,323	52,734	82,323	52,734	61,849
Commercial Portfolio [Member] \| Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance		1		1
Allowance for Loan Losses, Ending Balance		1		1
Allowance for loan losses: Ending balance: collectively evaluated for impairment		1		1
Loans receivables, Ending Balance	153	307	153	307	229
Loans Receivable: Ending balance: collectively evaluated for impairment	153	307	153	307	229
Consumer Portfolio [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	4	3	3	3
Charge-offs	(4)	(10)	(10)	(16)
Recoveries	2	1	4	4
Provisions	2	10	7	13
Allowance for Loan Losses, Ending Balance	4	4	4	4
Allowance for loan losses: Ending balance: collectively evaluated for impairment	4	4	4	4	3
Loans receivables, Ending Balance	4,881	3,878	4,881	3,878	3,868
Loans Receivable: Ending balance: collectively evaluated for impairment	4,881	3,878	4,881	3,878	3,868
Residential Portfolio [Member] \| Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	452	532	428	541
Charge-offs	(3)		(5)	(18)
Recoveries		2		4
Provisions	(8)	5	18	12
Allowance for Loan Losses, Ending Balance	441	539	441	539
Allowance for loan losses: Ending balance: individually evaluated for impairment		66		66
Allowance for loan losses: Ending balance: collectively evaluated for impairment	441	473	441	473	428
Loans receivables, Ending Balance	120,260	102,637	120,260	102,637	99,033
Loans receivables: Ending balance: individually evaluated for impairment	728	968	728	968	760
Loans Receivable: Ending balance: collectively evaluated for impairment	119,039	101,345	119,039	101,345	97,967
Residential Portfolio [Member] \| Financial Asset Acquired with Credit Deterioration [Member] \| Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending Balance	493	324	493	324	306
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning Balance	6	274	344	212
Provisions	329	(258)	(9)	(196)
Allowance for Loan Losses, Ending Balance	335	16	335	16
Allowance for loan losses: Ending balance: collectively evaluated for impairment	$ 335	$ 16	$ 335	$ 16	$ 344

A valuation allowance for financing receivables that are expected to be uncollectible.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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