Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Aging Analysis of Past Due Loans
30-59 Days Past Due	$ 6,476	$ 8,088
60-89 Days Past Due	4,491	2,741
90 Days or Greater	16,382	16,526
Total Past Due	27,349	27,355
Current	746,660	757,913
Total Loans	774,009	785,268
Past Due 90 Days and Accruing	279	1,314
Commercial & agriculture [Member]
Aging Analysis of Past Due Loans
30-59 Days Past Due	114	229
60-89 Days Past Due	153	174
90 Days or Greater	619	509
Total Past Due	886	912
Current	77,174	85,483
Total Loans	78,060	86,395
Past Due 90 Days and Accruing	239	19
Commercial Real Estate [Member]
Aging Analysis of Past Due Loans
30-59 Days Past Due	3,851	4,156
60-89 Days Past Due	2,344	1,369
90 Days or Greater	10,099	9,466
Total Past Due	16,294	14,991
Current	372,604	356,861
Total Loans	388,898	371,852
Past Due 90 Days and Accruing		737
Residential Real Estate [Member]
Aging Analysis of Past Due Loans
30-59 Days Past Due	2,385	3,614
60-89 Days Past Due	1,328	1,182
90 Days or Greater	5,262	6,504
Total Past Due	8,975	11,300
Current	245,504	263,695
Total Loans	254,479	274,995
Past Due 90 Days and Accruing	20	511
Real Estate Construction [Member]
Aging Analysis of Past Due Loans
60-89 Days Past Due	628
90 Days or Greater	382	45
Total Past Due	1,010	45
Current	41,316	39,745
Total Loans	42,326	39,790
Past Due 90 Days and Accruing		45
Consumer [Member]
Aging Analysis of Past Due Loans
30-59 Days Past Due	126	89
60-89 Days Past Due	38	16
90 Days or Greater	20	2
Total Past Due	184	107
Current	10,062	12,129
Total Loans	10,246	12,236
Past Due 90 Days and Accruing	$ 20	$ 2