Loans, Impaired Financing Receivable (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	$ 12,603		$ 12,076
Recorded Investment With No Allowance	8,468		8,232
Recorded Investment With Allowance	2,346		2,168
Total Recorded Investment	10,814		10,400
Related Allowance	676		333
Average Recorded Investment	10,779	10,862
Interest income recognized on impaired loans	62	67
Interest income recognized on a cash basis on impaired loans	0	14
Real Estate Loans [Member] | Mortgages [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	228		232
Recorded Investment With No Allowance	133		138
Recorded Investment With Allowance	69		70
Total Recorded Investment	202		208
Related Allowance	14		14
Average Recorded Investment	205	284
Interest income recognized on impaired loans	2	2
Interest income recognized on a cash basis on impaired loans	0	0
Real Estate Loans [Member] | Home Equity [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	133		134
Recorded Investment With No Allowance	65		65
Recorded Investment With Allowance	68		69
Total Recorded Investment	133		134
Related Allowance	13		13
Average Recorded Investment	133	137
Interest income recognized on impaired loans	1	1
Interest income recognized on a cash basis on impaired loans	0	0
Real Estate Loans [Member] | Commercial [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	10,141		9,901
Recorded Investment With No Allowance	6,485		6,335
Recorded Investment With Allowance	1,956		1,975
Total Recorded Investment	8,441		8,310
Related Allowance	504		305
Average Recorded Investment	8,533	8,785
Interest income recognized on impaired loans	26	45
Interest income recognized on a cash basis on impaired loans	0	14
Real Estate Loans [Member] | Agricultural [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	0		0
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	0		0
Total Recorded Investment	0		0
Related Allowance	0		0
Average Recorded Investment	0	0
Interest income recognized on impaired loans	0	0
Interest income recognized on a cash basis on impaired loans	0	0
Real Estate Loans [Member] | Construction [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	0		0
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	0		0
Total Recorded Investment	0		0
Related Allowance	0		0
Average Recorded Investment	0	0
Interest income recognized on impaired loans	0	0
Interest income recognized on a cash basis on impaired loans	0	0
Consumer [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	15		15
Recorded Investment With No Allowance	15		15
Recorded Investment With Allowance	0		0
Total Recorded Investment	15		15
Related Allowance	0		0
Average Recorded Investment	15	0
Interest income recognized on impaired loans	0	0
Interest income recognized on a cash basis on impaired loans	0	0
Other Commercial Loans [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	2,086		1,794
Recorded Investment With No Allowance	1,770		1,679
Recorded Investment With Allowance	253		54
Total Recorded Investment	2,023		1,733
Related Allowance	145		1
Average Recorded Investment	1,893	1,656
Interest income recognized on impaired loans	33	19
Interest income recognized on a cash basis on impaired loans	0	0
Other Agricultural Loans [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	0		0
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	0		0
Total Recorded Investment	0		0
Related Allowance	0		0
Average Recorded Investment	0	0
Interest income recognized on impaired loans	0	0
Interest income recognized on a cash basis on impaired loans	0	0
State and Political Subdivision Loans [Member]
Impaired Financing Receivable [Abstract]
Unpaid Principal Balance	0		0
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	0		0
Total Recorded Investment	0		0
Related Allowance	0		0
Average Recorded Investment	0	0
Interest income recognized on impaired loans	0	0
Interest income recognized on a cash basis on impaired loans	$ 0	$ 0