Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	$ 702	$ 2,029
With required reserve recorded, Carrying Value	5,223	6,073
Carrying Value	5,925	8,102	7,963
With no required reserve recorded, Unpaid Balance Principal	1,224	4,065
With required reserve recorded, Unpaid Balance Principal	7,277	6,132
Unpaid Balance Principal	8,501	10,197
With required reserve recorded, Required Reserve	1,732	741
Required Reserve	1,732	741
With no required reserve recorded, Average Carrying Value	1,071	3,152
With required reserve recorded, Average Carrying Value	5,972	7,132
Average Carrying Value	7,043	10,284	9,606
With no required reserve recorded, Interest Income Recognized	1	3
With required reserve recorded, Interest Income Recognized	179	152
Interest Income Recognized	180	155
Construction and Land Development [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value		1,500
With required reserve recorded, Carrying Value	1,500
Carrying Value	1,500	1,500
With no required reserve recorded, Unpaid Balance Principal		3,292
With required reserve recorded, Unpaid Balance Principal	3,292
Unpaid Balance Principal	3,292	3,292
With required reserve recorded, Required Reserve	1,000
Required Reserve	1,000
With no required reserve recorded, Average Carrying Value	346	2,377
With required reserve recorded, Average Carrying Value	1,154	926
Average Carrying Value	1,500	3,303
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	503	313
With required reserve recorded, Carrying Value	779	1,212
Carrying Value	1,282	1,525
With no required reserve recorded, Unpaid Balance Principal	994	537
With required reserve recorded, Unpaid Balance Principal	995	1,240
Unpaid Balance Principal	1,989	1,777
With required reserve recorded, Required Reserve	104	335
Required Reserve	104	335
With no required reserve recorded, Average Carrying Value	425	404
With required reserve recorded, Average Carrying Value	1,317	1,105
Average Carrying Value	1,742	1,509
With no required reserve recorded, Interest Income Recognized	1	3
With required reserve recorded, Interest Income Recognized	40	18
Interest Income Recognized	41	21
Commercial Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	169	183
With required reserve recorded, Carrying Value	2,112	4,378
Carrying Value	2,281	4,561
With no required reserve recorded, Unpaid Balance Principal	199	203
With required reserve recorded, Unpaid Balance Principal	2,158	4,409
Unpaid Balance Principal	2,357	4,612
With required reserve recorded, Required Reserve	415	282
Required Reserve	415	282
With no required reserve recorded, Average Carrying Value	176	368
With required reserve recorded, Average Carrying Value	2,817	4,894
Average Carrying Value	2,993	5,262
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	138	133
Interest Income Recognized	138	133
Residential Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	30	33
With required reserve recorded, Carrying Value	736	483
Carrying Value	766	516
With no required reserve recorded, Unpaid Balance Principal	31	33
With required reserve recorded, Unpaid Balance Principal	736	483
Unpaid Balance Principal	767	516
With required reserve recorded, Required Reserve	117	124
Required Reserve	117	124
With no required reserve recorded, Average Carrying Value	124	3
With required reserve recorded, Average Carrying Value	640	207
Average Carrying Value	764	210
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	1	1
Interest Income Recognized	1	1
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 Balance Principal
With required reserve recorded, Unpaid Balance Principal
Unpaid Balance Principal
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	96
Carrying Value	96
With no required reserve recorded, Unpaid Balance Principal
With required reserve recorded, Unpaid Balance Principal	96
Unpaid Balance Principal	96
With required reserve recorded, Required Reserve	96
Required Reserve	96
With no required reserve recorded, Average Carrying Value
With required reserve recorded, Average Carrying Value	44
Average Carrying Value	44
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized
Interest Income Recognized