Loans and Allowance for Loan Losses (Details 3) (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 changes in the allowance for loan losses
Balance at beginning of period	$ 3,338	$ 2,853	$ 3,058	$ 2,501
Loan charge-offs	(70)	(144)	(452)	(491)
Recoveries	49	25	111	176
Net loan charge-offs	(21)	(119)	(341)	(315)
Provision charged to operations	300	324	900	872
Balance at end of period	3,617	3,058	3,617	3,058
Commercial [Member]
Analysis of changes in the allowance for loan losses
Balance at beginning of period	600	518	565	249
Loan charge-offs			(17)
Recoveries	2	1	7	2
Net loan charge-offs	2	1	(10)	2
Provision charged to operations	85	18	132	286
Balance at end of period	687	537	687	537
Commercial Real Estate [Member]
Analysis of changes in the allowance for loan losses
Balance at beginning of period	2,100	1,739	1,803	1,611
Loan charge-offs	(20)		(36)	(200)
Recoveries	1	7	17	119
Net loan charge-offs	(19)	7	(19)	(81)
Provision charged to operations	280	120	577	336
Balance at end of period	2,361	1,866	2,361	1,866
Consumer - other [Member]
Analysis of changes in the allowance for loan losses
Balance at beginning of period	90	106	92	112
Loan charge-offs	(38)	(29)	(110)	(125)
Recoveries	11	13	40	46
Net loan charge-offs	(27)	(16)	(70)	(79)
Provision charged to operations	36	11	77	68
Balance at end of period	99	101	99	101
Consumer - home equity [Member]
Analysis of changes in the allowance for loan losses
Balance at beginning of period	152	101	128	111
Loan charge-offs		(91)	(58)	(91)
Recoveries	3	2	8	4
Net loan charge-offs	3	(89)	(50)	(87)
Provision charged to operations	(35)	118	42	106
Balance at end of period	120	130	120	130
Residential Real Estate [Member]
Analysis of changes in the allowance for loan losses
Balance at beginning of period	396	389	470	418
Loan charge-offs	(12)	(24)	(231)	(75)
Recoveries	32	2	39	5
Net loan charge-offs	20	(22)	(192)	(70)
Provision charged to operations	(66)	57	72	76
Balance at end of period	$ 350	$ 424	$ 350	$ 424