Loans and Allowance for Loan Losses (Analysis of allowance for loan losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Analysis of the allowance for loan losses
Beginning balance	$ 906	$ 767	$ 867	$ 926
Provision for possible loan losses	61	30	121	100
Charge-offs	(106)	(5)	(152)	(252)
Recoveries	8	7	33	25
Net charge-offs	(98)	2	(119)	(227)
Ending balance	869	799	869	799
Commercial and industrial [Member]
Analysis of the allowance for loan losses
Beginning balance	496	280	387	301
Provision for possible loan losses	63	15	172	55
Charge-offs	(56)		(56)	(62)
Recoveries				1
Net charge-offs	(56)		(56)	(61)
Ending balance	503	295	503	295
Commercial real estate [Member]
Analysis of the allowance for loan losses
Beginning balance	367	432	412	553
Provision for possible loan losses	(6)		(56)	23
Charge-offs				(148)
Recoveries	3	1	8	5
Net charge-offs	3	1	8	(143)
Ending balance	364	433	364	433
Consumer real estate [Member]
Analysis of the allowance for loan losses
Beginning balance	43	55	68	52
Provision for possible loan losses	1	15		15
Charge-offs	(43)		(80)
Recoveries	1	1	14	4
Net charge-offs	(42)	1	(66)	4
Ending balance	2	71	2	71
Consumer loans other [Member]
Analysis of the allowance for loan losses
Beginning balance				20
Provision for possible loan losses	3		5	7
Charge-offs	(7)	(5)	(16)	(42)
Recoveries	4	5	11	15
Net charge-offs	(3)		(5)	(27)
Ending balance