Loans Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 14,636	$ 14,603	$ 14,434	$ 15,298
Charge-offs	(168)	(92)	(504)	(982)
Recoveries	63	67	143	162
Provision	505	100	963	200
Allowance for Loan Losses, Ending Balance	15,036	14,678	15,036	14,678
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	14,954	14,678	14,954	14,678	14,434
Ending Loan Balance - Individually Evaluated for Impairment	3,521	2,776	3,521	2,776	4,488
Ending Loan Balance - Collectively Evaluated for Impairment	1,340,603	1,201,958	1,340,603	1,201,958	1,261,984
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	1,797	1,619	1,886	2,344
Charge-offs	(43)	(15)	(166)	(788)
Recoveries	6	36	25	40
Provision	295	(88)	310	(44)
Allowance for Loan Losses, Ending Balance	2,055	1,552	2,055	1,552
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	2,055	1,552	2,055	1,552	1,886
Ending Loan Balance - Individually Evaluated for Impairment	208	33	208	33	221
Ending Loan Balance - Collectively Evaluated for Impairment	93,682	87,516	93,682	87,516	87,672
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	420	612	417	601
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	25	34	28	45
Allowance for Loan Losses, Ending Balance	445	646	445	646
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	445	646	445	646	417
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	29,702	30,980	29,702	30,980	27,815
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,778	3,379	3,545	3,050
Charge-offs	0	0	0	(11)
Recoveries	0	0	0	0
Provision	(8)	(86)	225	254
Allowance for Loan Losses, Ending Balance	3,770	3,293	3,770	3,293
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	3,770	3,293	3,770	3,293	3,545
Ending Loan Balance - Individually Evaluated for Impairment	1,493	1,481	1,493	1,481	1,785
Ending Loan Balance - Collectively Evaluated for Impairment	308,153	258,318	308,153	258,318	286,334
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	280	308	272	304
Charge-offs	(12)	(5)	(26)	(13)
Recoveries	0	0	1	0
Provision	(2)	(4)	19	8
Allowance for Loan Losses, Ending Balance	266	299	266	299
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	266	299	266	299	272
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	7,863	7,456	7,863	7,456	7,649
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,306	4,294	4,206	4,536
Charge-offs	(83)	(72)	(267)	(170)
Recoveries	57	31	117	122
Provision	134	104	358	(131)
Allowance for Loan Losses, Ending Balance	4,414	4,357	4,414	4,357
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	4,414	4,357	4,414	4,357	4,206
Ending Loan Balance - Individually Evaluated for Impairment	125	184	125	184	173
Ending Loan Balance - Collectively Evaluated for Impairment	409,176	374,876	409,176	374,876	394,031
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,077	3,392	3,026	3,405
Charge-offs	(30)	0	(45)	0
Recoveries	0	0	0	0
Provision	86	16	152	3
Allowance for Loan Losses, Ending Balance	3,133	3,408	3,133	3,408
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	3,051	3,408	3,051	3,408	3,026
Ending Loan Balance - Individually Evaluated for Impairment	1,695	1,078	1,695	1,078	2,309
Ending Loan Balance - Collectively Evaluated for Impairment	492,027	442,812	492,027	442,812	458,483
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	978	999	1,082	1,058
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(25)	124	(129)	65
Allowance for Loan Losses, Ending Balance	953	1,123	953	1,123
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	953	1,123	953	1,123	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