Loans (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable Number Of Contracts	10	7	20	10
Financing Receivable Recorded Investment	$ 1,198	$ 4,022	$ 3,106	$ 5,898
Troubled debt restructurings, Increase/(Decrease) in the allowance	(17)	233	(21)	1,831
Residential Owner Occupied [Member]
Financing Receivable Number Of Contracts	2	1	7	2
Financing Receivable Recorded Investment	221	13	778	29
Troubled debt restructurings, Increase/(Decrease) in the allowance	(11)	0	(5)	0
Residential Non Owner Occupied [Member]
Financing Receivable Number Of Contracts	1		2
Financing Receivable Recorded Investment	34		116
Troubled debt restructurings, Increase/(Decrease) in the allowance	0		0
Commercial Real Estate Owner Occupied [Member]
Financing Receivable Number Of Contracts	3	2	5	3
Financing Receivable Recorded Investment	565	553	1,461	698
Troubled debt restructurings, Increase/(Decrease) in the allowance	0	0	0	434
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Number Of Contracts	1	3	1	4
Financing Receivable Recorded Investment	217	3,433	217	5,148
Troubled debt restructurings, Increase/(Decrease) in the allowance	(6)	240	(6)	1,397
Agriculture Land [Member]
Financing Receivable Number Of Contracts	1		2
Financing Receivable Recorded Investment	127		439
Troubled debt restructurings, Increase/(Decrease) in the allowance	0		(7)
Commercial Real Estate Other Receivable [Member]
Financing Receivable Number Of Contracts	0		1
Financing Receivable Recorded Investment	0		61
Troubled debt restructurings, Increase/(Decrease) in the allowance	0		(2)
Commercial and Industrial [Member]
Financing Receivable Number Of Contracts	2		2
Financing Receivable Recorded Investment	34		34
Troubled debt restructurings, Increase/(Decrease) in the allowance	0		(1)
Home Equity [Member]
Financing Receivable Number Of Contracts	0	1	0	1
Financing Receivable Recorded Investment	0	23	0	23
Troubled debt restructurings, Increase/(Decrease) in the allowance	$ 0	$ (7)	$ 0	$ 0