Loan Credit Quality Analysis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 369,408	$ 368,837
Financing Receivable, Recorded Investment, Special Mention	3,859	6,447
Financing Receivable Recorded Investment, Substandard Accruing	12,822	12,607
Financing Receivable, Recorded Investment, Nonaccrual Status	4,748	10,535
Loans and Leases Receivable, Gross, Carrying Amount	390,837	398,426	380,555
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	54,954	58,487
Financing Receivable, Recorded Investment, Special Mention	168	224
Financing Receivable Recorded Investment, Substandard Accruing	555	563
Financing Receivable, Recorded Investment, Nonaccrual Status	59	60
Loans and Leases Receivable, Gross, Carrying Amount	55,736	59,334	56,804
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	37,992	34,490
Financing Receivable, Recorded Investment, Special Mention	209	310
Financing Receivable Recorded Investment, Substandard Accruing	1,288	1,125
Financing Receivable, Recorded Investment, Nonaccrual Status	1,615	1,706
Loans and Leases Receivable, Gross, Carrying Amount	41,104	37,631	34,350
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	61,393	59,270
Financing Receivable, Recorded Investment, Special Mention	767	2,528
Financing Receivable Recorded Investment, Substandard Accruing	1,508	1,525
Financing Receivable, Recorded Investment, Nonaccrual Status	1,181	1,045
Loans and Leases Receivable, Gross, Carrying Amount	64,849	64,368
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	111,875	111,719
Financing Receivable, Recorded Investment, Special Mention	505	653
Financing Receivable Recorded Investment, Substandard Accruing	1,335	1,202
Financing Receivable, Recorded Investment, Nonaccrual Status	429	5,669
Loans and Leases Receivable, Gross, Carrying Amount	114,144	119,243
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	173,268	170,989
Financing Receivable, Recorded Investment, Special Mention	1,272	3,181
Financing Receivable Recorded Investment, Substandard Accruing	2,843	2,727
Financing Receivable, Recorded Investment, Nonaccrual Status	1,610	6,714
Loans and Leases Receivable, Gross, Carrying Amount	178,993	183,611	173,265
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	49,616	49,462
Financing Receivable, Recorded Investment, Special Mention	1,159	1,544
Financing Receivable Recorded Investment, Substandard Accruing	5,972	5,775
Financing Receivable, Recorded Investment, Nonaccrual Status	1,057	1,306
Loans and Leases Receivable, Gross, Carrying Amount	57,804	58,087
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	41,781	43,559
Financing Receivable, Recorded Investment, Special Mention	1,024	1,033
Financing Receivable Recorded Investment, Substandard Accruing	1,967	2,203
Financing Receivable, Recorded Investment, Nonaccrual Status	402	749
Loans and Leases Receivable, Gross, Carrying Amount	45,174	47,544
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	91,397	93,021
Financing Receivable, Recorded Investment, Special Mention	2,183	2,577
Financing Receivable Recorded Investment, Substandard Accruing	7,939	7,978
Financing Receivable, Recorded Investment, Nonaccrual Status	1,459	2,055
Loans and Leases Receivable, Gross, Carrying Amount	102,978	105,631	105,183
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	11,797	11,850
Financing Receivable, Recorded Investment, Special Mention	27	155
Financing Receivable Recorded Investment, Substandard Accruing	197	214
Financing Receivable, Recorded Investment, Nonaccrual Status	5	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 12,026	$ 12,219	$ 10,953