Loan Credit Quality Analysis (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 363,278	$ 330,300
Financing Receivable, Recorded Investment, Special Mention	10,008	11,246
Financing Receivable Recorded Investment, Substandard Accruing	18,078	18,516
Financing Receivable, Recorded Investment, Nonaccrual Status	8,228	10,354
Loans and Leases Receivable, Gross, Carrying Amount	399,592	370,416	373,907
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	58,363	52,834
Financing Receivable, Recorded Investment, Special Mention	413	1,359
Financing Receivable Recorded Investment, Substandard Accruing	545	719
Financing Receivable, Recorded Investment, Nonaccrual Status	97	76
Loans and Leases Receivable, Gross, Carrying Amount	59,418	54,988	52,027
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	33,634	33,373
Financing Receivable, Recorded Investment, Special Mention	532	266
Financing Receivable Recorded Investment, Substandard Accruing	944	1,080
Financing Receivable, Recorded Investment, Nonaccrual Status	3,858	5,095
Loans and Leases Receivable, Gross, Carrying Amount	38,968	39,814	43,864
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	64,879	62,543
Financing Receivable, Recorded Investment, Special Mention	5,265	4,951
Financing Receivable Recorded Investment, Substandard Accruing	916	1,057
Financing Receivable, Recorded Investment, Nonaccrual Status	1,663	1,651
Loans and Leases Receivable, Gross, Carrying Amount	72,723	70,202
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	103,947	81,584
Financing Receivable, Recorded Investment, Special Mention	613	622
Financing Receivable Recorded Investment, Substandard Accruing	8,113	8,221
Financing Receivable, Recorded Investment, Nonaccrual Status	450	1,806
Loans and Leases Receivable, Gross, Carrying Amount	113,123	92,233
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	168,826	144,127
Financing Receivable, Recorded Investment, Special Mention	5,878	5,573
Financing Receivable Recorded Investment, Substandard Accruing	9,029	9,278
Financing Receivable, Recorded Investment, Nonaccrual Status	2,113	3,457
Loans and Leases Receivable, Gross, Carrying Amount	185,846	162,435	166,272
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	50,698	50,156
Financing Receivable, Recorded Investment, Special Mention	1,541	1,575
Financing Receivable Recorded Investment, Substandard Accruing	4,845	5,279
Financing Receivable, Recorded Investment, Nonaccrual Status	1,008	948
Loans and Leases Receivable, Gross, Carrying Amount	58,092	57,958
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	40,966	38,732
Financing Receivable, Recorded Investment, Special Mention	1,435	2,225
Financing Receivable Recorded Investment, Substandard Accruing	2,582	2,032
Financing Receivable, Recorded Investment, Nonaccrual Status	1,152	778
Loans and Leases Receivable, Gross, Carrying Amount	46,135	43,767
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	91,664	88,888
Financing Receivable, Recorded Investment, Special Mention	2,976	3,800
Financing Receivable Recorded Investment, Substandard Accruing	7,427	7,311
Financing Receivable, Recorded Investment, Nonaccrual Status	2,160	1,726
Loans and Leases Receivable, Gross, Carrying Amount	104,227	101,725	100,496
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	10,791	11,078
Financing Receivable, Recorded Investment, Special Mention	209	248
Financing Receivable Recorded Investment, Substandard Accruing	133	128
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 11,133	$ 11,454	$ 11,248