Loans (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of allowances for loan losses by portfolio segment
Beginning balance	$ 4,471	$ 4,054	$ 4,082	$ 4,031
Provision for possible loan losses	206	240	617	710
Charge-offs	(39)	(192)	(203)	(686)
Recoveries	23	14	165	61
Net charge-offs	(16)	(178)	(38)	(625)
Ending balance	4,661	4,116	4,661	4,116
Commercial [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	896	1,012	1,024	1,179
Provision for possible loan losses	94	(9)	(33)	120
Charge-offs	0	(36)	(15)	(343)
Recoveries	2	1	16	12
Net charge-offs	2	(35)	1	(331)
Ending balance	992	968	992	968
Commercial real estate [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	1,927	1,558	1,673	1,183
Provision for possible loan losses	108	(59)	376	359
Charge-offs	0	(25)	(14)	(68)
Recoveries	0	0	0	0
Net charge-offs	0	(25)	(14)	(68)
Ending balance	2,035	1,474	2,035	1,474
Residential real estate [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	1,051	776	894	1,057
Provision for possible loan losses	(45)	304	127	98
Charge-offs	0	(72)	(104)	(156)
Recoveries	10	0	99	9
Net charge-offs	10	(72)	(5)	(147)
Ending balance	1,016	1,008	1,016	1,008
Construction & Land Development [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	217	272	180	213
Provision for possible loan losses	85	4	122	63
Charge-offs	0	(41)	0	(41)
Recoveries	0	0	0	0
Net charge-offs	0	(41)	0	(41)
Ending balance	302	235	302	235
Consumer [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	64	81	78	80
Provision for possible loan losses	46	2	24	36
Charge-offs	(39)	(18)	(70)	(78)
Recoveries	11	13	50	40
Net charge-offs	(28)	(5)	(20)	(38)
Ending balance	82	78	82	78
Unallocated [Member]
Schedule of allowances for loan losses by portfolio segment
Beginning balance	316	355	233	319
Provision for possible loan losses	(82)	(2)	1	34
Ending balance	$ 234	$ 353	$ 234	$ 353