Loans and Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Activity in the allowance for loan losses, by classification
Beginning balance	$ 7,675	$ 9,015	$ 8,164	$ 11,224
Provision for loan losses	80	730	943	1,525
Loans charged off	(755)	(911)	(2,161)	(4,068)
Loan recoveries	83	94	137	247
Ending balance	7,083	8,928	7,083	8,928
Commercial [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	534	717	891	871
Provision for loan losses	16	452	197	293
Loans charged off	0	(134)	(551)	(136)
Loan recoveries	17	14	30	21
Ending balance	567	1,049	567	1,049
Commercial Real Estate [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	6,176	7,136	5,759	9,155
Provision for loan losses	(173)	(171)	895	699
Loans charged off	(555)	(752)	(1,235)	(3,766)
Loan recoveries	49	71	78	196
Ending balance	5,497	6,284	5,497	6,284
Residential Real Estate [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	491	397	476	411
Provision for loan losses	90	(10)	164	(13)
Loans charged off	(149)	0	(209)	(11)
Loan recoveries	1	1	2	1
Ending balance	433	388	433	388
Installment Loans [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	175	190	215	233
Provision for loan losses	(20)	39	(57)	43
Loans charged off	(8)	(4)	(18)	(57)
Loan recoveries	4	6	11	12
Ending balance	151	231	151	231
Home Equity [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	295	573	482	508
Provision for loan losses	130	61	44	188
Loans charged off	(43)	(21)	(148)	(98)
Loan recoveries	12	2	16	17
Ending balance	394	615	394	615
Unallocated [Member]
Activity in the allowance for loan losses, by classification
Beginning balance	4	2	341	46
Provision for loan losses	37	359	(300)	315
Loans charged off	0	0	0	0
Loan recoveries	0	0	0	0
Ending balance	$ 41	$ 361	$ 41	$ 361