Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	$ 838	$ 1,507	$ 838	$ 1,507
With required reserve recorded, Carrying Value	5,720	6,801	5,720	6,801
Carrying Value	6,558	8,308	6,558	8,308
With no required reserve recorded, Unpaid Principal Balance	1,577	1,971	1,577	1,971
With required reserve recorded, Unpaid Principal Balance	7,600	8,343	7,600	8,343
Unpaid Principal Balance	9,177	10,314	9,177	10,314
With required reserve recorded, Required Reserve	2,113	925	2,113	925
Required Reserve	2,113	925	2,113	925
With no required reserve recorded, Average Carrying Value	865	2,039	1,162	3,747
With required reserve recorded, Average Carrying Value	5,950	10,422	6,208	7,214
Average Carrying Value	6,815	12,461	7,370	10,961
With no required reserve recorded, Interest Income Recognized		1		3
With required reserve recorded, Interest Income Recognized	53	89	120	124
Interest Income Recognized	53	90	120	127
Construction and Land Development [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value
With required reserve recorded, Carrying Value	1,500	1,800	1,500	1,800
Carrying Value	1,500	1,800	1,500	1,800
With no required reserve recorded, Unpaid Principal Balance
With required reserve recorded, Unpaid Principal Balance	3,292	3,292	3,292	3,292
Unpaid Principal Balance	3,292	3,292	3,292	3,292
With required reserve recorded, Required Reserve	1,000	350	1,000	350
Required Reserve	1,000	350	1,000	350
With no required reserve recorded, Average Carrying Value		1,350	450	2,940
With required reserve recorded, Average Carrying Value	1,500	2,110	1,050	844
Average Carrying Value	1,500	3,460	1,500	3,784
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized
Interest Income Recognized
Commercial and Industrial [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	635	642	635	642
With required reserve recorded, Carrying Value	1,247	1,136	1,247	1,136
Carrying Value	1,882	1,778	1,882	1,778
With no required reserve recorded, Unpaid Principal Balance	1,346	1,090	1,346	1,090
With required reserve recorded, Unpaid Principal Balance	1,295	1,160	1,295	1,160
Unpaid Principal Balance	2,641	2,250	2,641	2,250
With required reserve recorded, Required Reserve	455	345	455	345
Required Reserve	455	345	455	345
With no required reserve recorded, Average Carrying Value	473	443	382	429
With required reserve recorded, Average Carrying Value	1,745	1,428	1,492	1,087
Average Carrying Value	2,218	1,871	1,874	1,516
With no required reserve recorded, Interest Income Recognized		1		3
With required reserve recorded, Interest Income Recognized	12	6	35	10
Interest Income Recognized	12	7	35	13
Commercial Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	172	415	172	415
With required reserve recorded, Carrying Value	2,130	3,832	2,130	3,832
Carrying Value	2,302	4,247	2,302	4,247
With no required reserve recorded, Unpaid Principal Balance	200	431	200	431
With required reserve recorded, Unpaid Principal Balance	2,170	3,858	2,170	3,858
Unpaid Principal Balance	2,370	4,289	2,370	4,289
With required reserve recorded, Required Reserve	434	227	434	227
Required Reserve	434	227	434	227
With no required reserve recorded, Average Carrying Value	174	246	178	378
With required reserve recorded, Average Carrying Value	2,138	6,738	3,027	5,215
Average Carrying Value	2,312	6,984	3,205	5,593
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	40	82	84	112
Interest Income Recognized	40	82	84	112
Residential Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	31	450	31	450
With required reserve recorded, Carrying Value	746	33	746	33
Carrying Value	777	483	777	483
With no required reserve recorded, Unpaid Principal Balance	31	450	31	450
With required reserve recorded, Unpaid Principal Balance	746	33	746	33
Unpaid Principal Balance	777	483	777	483
With required reserve recorded, Required Reserve	127	3	127	3
Required Reserve	127	3	127	3
With no required reserve recorded, Average Carrying Value	218		152
With required reserve recorded, Average Carrying Value	494	146	610	68
Average Carrying Value	712	146	762	68
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	1	1	1	2
Interest Income Recognized	1	1	1	2
Consumer [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value
With required reserve recorded, Carrying Value
Carrying Value
With no required reserve recorded, Unpaid Principal Balance
With required reserve recorded, Unpaid Principal Balance
Unpaid Principal Balance
With required reserve recorded, Required Reserve
Required Reserve
With no required reserve recorded, Average Carrying Value
With required reserve recorded, Average Carrying Value
Average Carrying Value
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized
Interest Income Recognized
Home Equity [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value
With required reserve recorded, Carrying Value	97		97
Carrying Value	97		97
With no required reserve recorded, Unpaid Principal Balance
With required reserve recorded, Unpaid Principal Balance	97		97
Unpaid Principal Balance	97		97
With required reserve recorded, Required Reserve	97		97
Required Reserve	97		97
With no required reserve recorded, Average Carrying Value
With required reserve recorded, Average Carrying Value	73		29
Average Carrying Value	73		29
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized
Interest Income Recognized