Loans Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	$ 14,434	$ 15,298	$ 15,003
Charge-offs	(1,021)	(1,411)	(782)
Recoveries	309	347	232
Provision	1,848	200	845
Allowance for Credit Losses, Ending Balance	15,570	14,434	15,298
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	109	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	15,461	14,434
Ending Loan Balance - Individually Evaluated for Impairment	4,341	4,488
Ending Loan Balance - Collectively Evaluated for Impairment	1,408,927	1,261,984
Commercial [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	1,886	2,344	1,927
Charge-offs	(212)	(926)	(90)
Recoveries	86	88	23
Provision	340	380	484
Allowance for Credit Losses, Ending Balance	2,100	1,886	2,344
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	2,100	1,886
Ending Loan Balance - Individually Evaluated for Impairment	494	221
Ending Loan Balance - Collectively Evaluated for Impairment	99,017	87,672
Commercial Construction [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	417	601	602
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(135)	(184)	(1)
Allowance for Credit Losses, Ending Balance	282	417	601
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	282	417
Ending Loan Balance - Individually Evaluated for Impairment	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	18,815	27,815
Commercial Real Estate [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	3,545	3,050	3,136
Charge-offs	0	(11)	(206)
Recoveries	0	0	0
Provision	301	506	120
Allowance for Credit Losses, Ending Balance	3,846	3,545	3,050
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	3,846	3,545
Ending Loan Balance - Individually Evaluated for Impairment	1,492	1,785
Ending Loan Balance - Collectively Evaluated for Impairment	319,805	286,334
Other Consumer [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	272	304	350
Charge-offs	(41)	(28)	(52)
Recoveries	6	3	9
Provision	22	(7)	(3)
Allowance for Credit Losses, Ending Balance	259	272	304
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	259	272
Ending Loan Balance - Individually Evaluated for Impairment	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	7,665	7,649
Automobile [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	4,206	4,536	4,496
Charge-offs	(677)	(431)	(401)
Recoveries	217	256	200
Provision	1,205	(155)	241
Allowance for Credit Losses, Ending Balance	4,951	4,206	4,536
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	4,951	4,206
Ending Loan Balance - Individually Evaluated for Impairment	118	173
Ending Loan Balance - Collectively Evaluated for Impairment	429,258	394,031
Residential [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	3,026	3,405	3,414
Charge-offs	(91)	(15)	(33)
Recoveries	0	0	0
Provision	434	(364)	24
Allowance for Credit Losses, Ending Balance	3,369	3,026	3,405
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	109	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	3,260	3,026
Ending Loan Balance - Individually Evaluated for Impairment	2,237	2,309
Ending Loan Balance - Collectively Evaluated for Impairment	534,367	458,483
Unallocated [Member]
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward]
Allowance for Credit Losses, Beginning Balance	1,082	1,058	1,078
Charge-offs		0	0
Recoveries		0	0
Provision	(319)	24	(20)
Allowance for Credit Losses, Ending Balance	763	1,082	1,058
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan Losses - Individually Evaluated for Impairment	0	0
Allowance for Loan Losses - Collectively Evaluated for Impairment	763	1,082
Ending Loan Balance - Individually Evaluated for Impairment	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	$ 0	$ 0

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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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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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