Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	$ 1,050	$ 425
With required reserve recorded, Carrying Value	5,436	7,852
Carrying Value	6,486	8,277
With no required reserve recorded, Unpaid Balance Principal	1,577	493
With required reserve recorded, Unpaid Balance Principal	7,575	9,898
Unpaid Principal Balance	9,152	10,391
With no required reserve recorded, Required Reserve
With required reserve recorded, Required Reserve	1,750	2,111
Required Reserve	1,750	2,111
With no required reserve recorded, Average Carrying Value	814	1,808
With required reserve recorded, Average Carrying Value	5,320	6,451
Average Carrying Value	6,134	8,259
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	33	49
Interest Income Recognized	33	49
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	1,500
Carrying Value	1,500	1,500
With no required reserve recorded, Unpaid Balance Principal
With required reserve recorded, Unpaid Balance Principal	3,292	3,292
Unpaid Principal Balance	3,292	3,292
With no required reserve recorded, Required Reserve
With required reserve recorded, Required Reserve	1,000	1,000
Required Reserve	1,000	1,000
With no required reserve recorded, Average Carrying Value		1,125
With required reserve recorded, Average Carrying Value	1,500	375
Average Carrying Value	1,500	1,500
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	566	214
With required reserve recorded, Carrying Value	830	1,507
Carrying Value	1,396	1,721
With no required reserve recorded, Unpaid Balance Principal	1,058	259
With required reserve recorded, Unpaid Balance Principal	1,046	1,730
Unpaid Principal Balance	2,104	1,989
With no required reserve recorded, Required Reserve
With required reserve recorded, Required Reserve	103	493
Required Reserve	103	493
With no required reserve recorded, Average Carrying Value	545	357
With required reserve recorded, Average Carrying Value	840	1,285
Average Carrying Value	1,385	1,642
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	9	14
Interest Income Recognized	9	14
Commercial Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	165	179
With required reserve recorded, Carrying Value	2,097	4,362
Carrying Value	2,262	4,541
With no required reserve recorded, Unpaid Balance Principal	198	202
With required reserve recorded, Unpaid Balance Principal	2,146	4,394
Unpaid Principal Balance	2,344	4,596
With no required reserve recorded, Required Reserve
With required reserve recorded, Required Reserve	396	525
Required Reserve	396	525
With no required reserve recorded, Average Carrying Value	167	181
With required reserve recorded, Average Carrying Value	2,105	4,002
Average Carrying Value	2,272	4,183
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized	24	34
Interest Income Recognized	24	34
Residential Real Estate [Member]
Information pertaining to impaired loans
With no required reserve recorded, Carrying Value	319	32
With required reserve recorded, Carrying Value	913	483
Carrying Value	1,232	515
With no required reserve recorded, Unpaid Balance Principal	321	32
With required reserve recorded, Unpaid Balance Principal	995	482
Unpaid Principal Balance	1,316	514
With no required reserve recorded, Required Reserve
With required reserve recorded, Required Reserve	155	93
Required Reserve	155	93
With no required reserve recorded, Average Carrying Value	102	145
With required reserve recorded, Average Carrying Value	779	789
Average Carrying Value	881	934
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized		1
Interest Income Recognized		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 Principal Balance
With no required reserve recorded, Required Reserve
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 Principal Balance	96
With no required reserve recorded, Required Reserve
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	96
Average Carrying Value	96
With no required reserve recorded, Interest Income Recognized
With required reserve recorded, Interest Income Recognized
Interest Income Recognized