Loans, Loans Portfolio by Credit Quality Indicators (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment [Line Items]
Totals	$ 461,581	$ 461,262	$ 457,556
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	25,329	30,973
Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	230,098	219,062
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	187,994	187,148
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	12,597	14,690
Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	1,641	2,835
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	3,922	6,554
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	437,748	437,821
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	22,146	26,099
Pass [Member] | Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	219,325	206,728
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	178,178	182,409
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	12,540	14,601
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	1,637	1,430
Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	3,922	6,554
OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	7,394	5,514
OAEM [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	2,526	1,700
OAEM [Member] | Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	2,236	2,133
OAEM [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	2,632	1,681
OAEM [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	0
OAEM [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	0
OAEM [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	0
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	16,439	16,574
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	657	2,804
Substandard [Member] | Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	8,537	9,633
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	7,184	2,682
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	57	50
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	4	1,405
Substandard [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	0
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	1,353
Doubtful [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	370
Doubtful [Member] | Commercial Secured By Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	568
Doubtful [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	376
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	39
Doubtful [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	0	0
Doubtful [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Totals	$ 0	$ 0