Allowance for Loan Losses, Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
With no related allowance recorded [Abstract]
Recorded Investment	$ 9,214	$ 4,648
Unpaid Principal Balance	9,435	4,913
Average Recorded Investment	5,653	3,645
Interest Income Recognized	71	25
With an allowance recorded [Abstract]
Recorded Investment	2,405	4,334
Unpaid Principal Balance	2,463	5,056
Related Allowance	1,374	1,636
Average Recorded Investment	1,423	4,896
Interest Income Recognized	9	116
Recorded Investment, Total	11,619	8,982
Unpaid Principal Balance, Total	11,898	9,969
Related Allowance	1,374	1,636
Average Recorded Investment, Total	7,076	8,541
Interest Income Recognized, Total	80	141
Commercial Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded Investment	289	1,555
Unpaid Principal Balance	289	1,547
Average Recorded Investment	506	729
Interest Income Recognized	20	0
With an allowance recorded [Abstract]
Recorded Investment	0	3,017
Unpaid Principal Balance	0	3,015
Related Allowance	0	686
Average Recorded Investment	0	2,281
Interest Income Recognized	0	89
Related Allowance	0	686
Agricultural Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded Investment	5,437	955
Unpaid Principal Balance	5,454	974
Average Recorded Investment	2,611	1,341
Interest Income Recognized	0	0
With an allowance recorded [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	529
Interest Income Recognized	0	0
Related Allowance	0	0
Real Estate Construction [Member]
With no related allowance recorded [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
With an allowance recorded [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Related Allowance	0	0
Residential 1st Mortgages [Member]
With no related allowance recorded [Abstract]
Recorded Investment	658	1,219
Unpaid Principal Balance	761	1,272
Average Recorded Investment	458	936
Interest Income Recognized	3	13
With an allowance recorded [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	54	0
Interest Income Recognized	0	0
Related Allowance	0	0
Home Equity [Member]
With no related allowance recorded [Abstract]
Recorded Investment	792	469
Unpaid Principal Balance	871	484
Average Recorded Investment	775	290
Interest Income Recognized	23	2
With an allowance recorded [Abstract]
Recorded Investment	194	113
Unpaid Principal Balance	237	119
Related Allowance	173	80
Average Recorded Investment	182	117
Interest Income Recognized	4	2
Related Allowance	173	80
Agricultural [Member]
With no related allowance recorded [Abstract]
Recorded Investment	1,932	262
Unpaid Principal Balance	1,954	372
Average Recorded Investment	1,159	149
Interest Income Recognized	19	9
With an allowance recorded [Abstract]
Recorded Investment	2,006	1,076
Unpaid Principal Balance	2,019	1,791
Related Allowance	996	793
Average Recorded Investment	997	1,818
Interest Income Recognized	1	25
Related Allowance	996	793
Commercial [Member]
With no related allowance recorded [Abstract]
Recorded Investment	106	188
Unpaid Principal Balance	106	264
Average Recorded Investment	144	195
Interest Income Recognized	6	1
With an allowance recorded [Abstract]
Recorded Investment	144	104
Unpaid Principal Balance	144	107
Related Allowance	144	54
Average Recorded Investment	159	120
Interest Income Recognized	4	0
Related Allowance	144	54
Consumer & Other [Member]
With no related allowance recorded [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	5
Interest Income Recognized	0	0
With an allowance recorded [Abstract]
Recorded Investment	61	24
Unpaid Principal Balance	63	24
Related Allowance	61	23
Average Recorded Investment	31	31
Interest Income Recognized	0	0
Related Allowance	$ 61	$ 23