Loans (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for loan losses:
Beginning balance	$ 18,473	$ 20,664	$ 18,536	$ 20,834
Charge-offs	(436)	(1,144)	(992)	(1,738)
Recoveries	553	360	2,270	920
Credit for loan and lease losses	2	280	1,226	416
Ending balance	18,588	19,600	18,588	19,600
Allowance for loan losses:
Individually evaluated for impairment	438		438		310
Collectively evaluated for impairment	18,150		18,150		18,226
Total	18,588	19,600	18,588	19,600
Loans receivable:
Individually evaluated for impairment	13,244		13,244		15,225
Collectively evaluated for impairment	628,770		628,770		582,550
Total	642,014		642,014		597,775
Commercial and Industrial
Allowance for loan losses:
Beginning balance	3,605	3,405	4,167	3,292
Charge-offs	(83)	(101)	(128)	(150)
Recoveries	69	57	1,585	182
Credit for loan and lease losses	(104)	697	(2,137)	734
Ending balance	3,487	4,058	3,487	4,058
Allowance for loan losses:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	3,487		3,487		4,167
Total	3,487	4,058	3,487	4,058
Loans receivable:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	111,437		111,437		109,693
Total	111,437		111,437		109,693
Consumer
Allowance for loan losses:
Beginning balance	1,739	1,457	1,708	1,526
Charge-offs	(165)	(170)	(359)	(249)
Recoveries	133	41	276	119
Credit for loan and lease losses	53	296	135	228
Ending balance	1,760	1,624	1,760	1,624
Allowance for loan losses:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,760		1,760		1,708
Total	1,760	1,624	1,760	1,624
Loans receivable:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	113,187		113,187		109,783
Total	113,187		113,187		109,783
Residential Real Estate
Loans receivable:
Total	109,805		109,805		90,228
Residential Real Estate | Real Estate
Allowance for loan losses:
Beginning balance	1,884	1,799	1,764	1,823
Charge-offs	(188)	(131)	(347)	(443)
Recoveries	173	15	181	34
Credit for loan and lease losses	276	322	547	591
Ending balance	2,145	2,005	2,145	2,005
Allowance for loan losses:
Individually evaluated for impairment	27		27		40
Collectively evaluated for impairment	2,118		2,118		1,724
Total	2,145	2,005	2,145	2,005
Loans receivable:
Individually evaluated for impairment	2,078		2,078		2,773
Collectively evaluated for impairment	107,727		107,727		87,455
Total	109,805		109,805		90,228
Commercial Real Estate | Real Estate
Allowance for loan losses:
Beginning balance	8,882	10,741	8,062	11,151
Charge-offs	0	(742)	(48)	(896)
Recoveries	64	13	109	330
Credit for loan and lease losses	(1,123)	(220)	(300)	(793)
Ending balance	7,823	9,792	7,823	9,792
Allowance for loan losses:
Individually evaluated for impairment	336		336		268
Collectively evaluated for impairment	7,487		7,487		7,794
Total	7,823	9,792	7,823	9,792
Loans receivable:
Individually evaluated for impairment	10,235		10,235		11,459
Collectively evaluated for impairment	229,895		229,895		210,132
Total	240,130		240,130		221,591
Construction, Land Acquisition and Development
Loans receivable:
Total	25,374		25,374		32,502
Construction, Land Acquisition and Development | Real Estate
Allowance for loan losses:
Beginning balance	1,676	2,845	2,162	2,590
Charge-offs	0	0	(110)	0
Recoveries	114	234	119	255
Credit for loan and lease losses	600	(1,414)	219	(1,180)
Ending balance	2,390	1,665	2,390	1,665
Allowance for loan losses:
Individually evaluated for impairment	75		75		2
Collectively evaluated for impairment	2,315		2,315		2,160
Total	2,390	1,665	2,390	1,665
Loans receivable:
Individually evaluated for impairment	931		931		993
Collectively evaluated for impairment	24,443		24,443		31,509
Total	25,374		25,374		32,502
State and Political Subdivisions
Allowance for loan losses:
Beginning balance	687	417	673	452
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Credit for loan and lease losses	296	39	310	4
Ending balance	983	456	983	456
Allowance for loan losses:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	983		983		673
Total	983	456	983	456
Loans receivable:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	42,081		42,081		33,978
Total	$ 42,081		$ 42,081		$ 33,978