Allowance for Loan Losses (Analysis of allowance for loan losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Analysis of the allowance for loan losses
Beginning balance	$ 864	$ 744	$ 867	$ 926
Provision for possible loan losses	30	40	60	70
Charge-offs		(24)	(47)	(247)
Recoveries	12	7	26	18
Net charge-offs	12	(17)	(21)	(229)
Ending balance	906	767	906	767
Commercial and industrial [Member]
Analysis of the allowance for loan losses
Beginning balance	417	239	387	301
Provision for possible loan losses	79	40	109	40
Charge-offs				(62)
Recoveries		1		1
Net charge-offs		1		(61)
Ending balance	496	280	496	280
Commercial real estate [Member]
Analysis of the allowance for loan losses
Beginning balance	412	430	412	553
Provision for possible loan losses	(47)		(50)	23
Charge-offs				(148)
Recoveries	2	2	5	4
Net charge-offs	2	2	5	(144)
Ending balance	367	432	367	432
Consumer real estate [Member]
Analysis of the allowance for loan losses
Beginning balance	35	75	68	52
Provision for possible loan losses	(2)	(20)
Charge-offs			(38)
Recoveries	10		13	3
Net charge-offs	10		(21)	3
Ending balance	43	55	43	55
Consumer loans other [Member]
Analysis of the allowance for loan losses
Beginning balance				20
Provision for possible loan losses		20	1	7
Charge-offs		(24)	(9)	(37)
Recoveries		4	8	10
Net charge-offs		(20)	(1)	(27)
Ending balance