Loans Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 15,036	$ 14,678	$ 14,434	$ 15,298
Charge-offs	(265)	(183)	(769)	(1,165)
Recoveries	78	89	221	251
Provision	444	0	1,407	200
Allowance for Loan Losses, Ending Balance	15,293	14,584	15,293	14,584
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	82	0	82	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	15,211	14,584	15,211	14,584	14,434
Ending Loan Balance - Individually Evaluated for Impairment	4,017	3,411	4,017	3,411	4,488
Ending Loan Balance - Collectively Evaluated for Impairment	1,377,423	1,239,959	1,377,423	1,239,959	1,261,984
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	2,055	1,552	1,886	2,344
Charge-offs	(26)	(62)	(192)	(850)
Recoveries	24	8	49	48
Provision	90	209	400	165
Allowance for Loan Losses, Ending Balance	2,143	1,707	2,143	1,707
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	2,143	1,707	2,143	1,707	1,886
Ending Loan Balance - Individually Evaluated for Impairment	201	25	201	25	221
Ending Loan Balance - Collectively Evaluated for Impairment	96,645	87,092	96,645	87,092	87,672
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	445	646	417	601
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(45)	4	(17)	49
Allowance for Loan Losses, Ending Balance	400	650	400	650
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	400	650	400	650	417
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	26,709	33,960	26,709	33,960	27,815
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,770	3,293	3,545	3,050
Charge-offs	0	0	0	(11)
Recoveries	0	0	0	0
Provision	(19)	15	206	269
Allowance for Loan Losses, Ending Balance	3,751	3,308	3,751	3,308
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	3,751	3,308	3,751	3,308	3,545
Ending Loan Balance - Individually Evaluated for Impairment	1,493	1,497	1,493	1,497	1,785
Ending Loan Balance - Collectively Evaluated for Impairment	312,406	261,607	312,406	261,607	286,334
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	266	299	272	304
Charge-offs	(8)	(7)	(34)	(20)
Recoveries	3	2	4	2
Provision	(7)	(29)	12	(21)
Allowance for Loan Losses, Ending Balance	254	265	254	265
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	254	265	254	265	272
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	7,413	7,570	7,413	7,570	7,649
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,414	4,357	4,206	4,536
Charge-offs	(185)	(114)	(452)	(284)
Recoveries	51	79	168	201
Provision	256	(14)	614	(145)
Allowance for Loan Losses, Ending Balance	4,536	4,308	4,536	4,308
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	4,536	4,308	4,536	4,308	4,206
Ending Loan Balance - Individually Evaluated for Impairment	123	169	123	169	173
Ending Loan Balance - Collectively Evaluated for Impairment	419,430	392,183	419,430	392,183	394,031
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,133	3,408	3,026	3,405
Charge-offs	(46)	0	(91)	0
Recoveries	0	0	0	0
Provision	187	(159)	339	(156)
Allowance for Loan Losses, Ending Balance	3,274	3,249	3,274	3,249
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	82	0	82	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	3,192	3,249	3,192	3,249	3,026
Ending Loan Balance - Individually Evaluated for Impairment	2,200	1,720	2,200	1,720	2,309
Ending Loan Balance - Collectively Evaluated for Impairment	514,820	457,547	514,820	457,547	458,483
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	953	1,123	1,082	1,058
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(18)	(26)	(147)	39
Allowance for Loan Losses, Ending Balance	935	1,097	935	1,097
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	935	1,097	935	1,097	1,082
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	$ 0	$ 0	$ 0	$ 0	$ 0