Loans, Loans Portfolio Aging 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]
30 -59 days past due	$ 1,201	$ 1,275
60-89 days past due	512	142
Greater than 90 days	3,321	3,505
Total past due	5,034	4,922
Current	456,547	456,340
Total loans receivables	461,581	461,262	457,556
Total loans greater than 90 days and still accruing	73	39
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	0	2
60-89 days past due	0	0
Greater than 90 days	242	495
Total past due	242	497
Current	25,087	30,476
Total loans receivables	25,329	30,973
Total loans greater than 90 days and still accruing	0	0
Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	468	0
60-89 days past due	81	83
Greater than 90 days	1,007	1,769
Total past due	1,556	1,852
Current	228,542	217,210
Total loans receivables	230,098	219,062
Total loans greater than 90 days and still accruing	0	0
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	617	1,132
60-89 days past due	411	22
Greater than 90 days	2,038	1,202
Total past due	3,066	2,356
Current	184,928	184,792
Total loans receivables	187,994	187,148
Total loans greater than 90 days and still accruing	39	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	71	82
60-89 days past due	20	37
Greater than 90 days	34	39
Total past due	125	158
Current	12,472	14,532
Total loans receivables	12,597	14,690
Total loans greater than 90 days and still accruing	34	39
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	0	0
60-89 days past due	0	0
Greater than 90 days	0	0
Total past due	0	0
Current	1,641	2,835
Total loans receivables	1,641	2,835
Total loans greater than 90 days and still accruing	0	0
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 -59 days past due	45	59
60-89 days past due	0	0
Greater than 90 days	0	0
Total past due	45	59
Current	3,877	6,495
Total loans receivables	3,922	6,554
Total loans greater than 90 days and still accruing	$ 0	$ 0