Loans Past Due Analysis (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 389,608	$ 357,252
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,750	2,810
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	6	0
Financing Receivable, Recorded Investment, Total Still Accruing	391,364	360,062
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	59,000	53,721
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	321	1,191
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	59,321	54,912
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	34,840	34,402
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	270	317
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	35,110	34,719
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	71,060	68,551
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	71,060	68,551
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	112,581	90,427
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	92	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	112,673	90,427
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	183,641	158,978
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	92	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	183,733	158,978
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	56,775	56,610
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	309	400
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	57,084	57,010
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	44,284	42,144
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	699	845
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	44,983	42,989
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	101,059	98,754
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,008	1,245
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	102,067	99,999
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, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	11,068	11,397
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	59	57
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	6	0
Financing Receivable, Recorded Investment, Total Still Accruing	11,133	11,454
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 11,133	$ 11,454	$ 11,248