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Loans and Allowance for Loan Losses (Details 5) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with no related allowance recorded	$ 279		$ 1,331
Unpaid Principal Balance with no related allowance recorded	521		1,923
Average Recorded Investment with no related allowance recorded	805	$ 1,550
Interest Income Recognized with no related allowance recorded	1	7
Recorded Investment with an allowance recorded	4,419		3,580
Unpaid Principal Balance with an allowance recorded	4,401		3,682
Related Allowance	441		403
Average Recorded Investment with an allowance recorded	4,000	4,367
Interest Income Recognized with an allowance recorded	44	31
Recorded Investment	4,698		4,911
Unpaid Principal Balance	4,922		5,605
Average Recorded Investment	4,805	5,917
Interest Income Recognized	45	39
Agricultural [Member]
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with no related allowance recorded			482
Unpaid Principal Balance with no related allowance recorded			485
Average Recorded Investment with no related allowance recorded	241	64
Interest Income Recognized with no related allowance recorded		2
Recorded Investment with an allowance recorded	482		44
Unpaid Principal Balance with an allowance recorded	486		44
Related Allowance	36		3
Average Recorded Investment with an allowance recorded	263	49
Recorded Investment	482		526
Unpaid Principal Balance	486		529
Average Recorded Investment	504	113
Interest Income Recognized		2
Commercial and Industrial [Member]
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with no related allowance recorded	177		206
Unpaid Principal Balance with no related allowance recorded	316		207
Average Recorded Investment with no related allowance recorded	191	37
Interest Income Recognized with no related allowance recorded	1
Recorded Investment with an allowance recorded	318		95
Unpaid Principal Balance with an allowance recorded	179		95
Related Allowance	25		11
Average Recorded Investment with an allowance recorded	207	214
Interest Income Recognized with an allowance recorded	3	(3)
Recorded Investment	495		301
Unpaid Principal Balance	495		302
Average Recorded Investment	398	251
Interest Income Recognized	4	(3)
Consumer [Member]
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with an allowance recorded	34		28
Unpaid Principal Balance with an allowance recorded	34		28
Related Allowance	6		2
Average Recorded Investment with an allowance recorded	31	23
Interest Income Recognized with an allowance recorded	1	0
Recorded Investment	34		28
Unpaid Principal Balance	34		28
Average Recorded Investment	31	23
Interest Income Recognized	1	0
Commercial Real Estate [Member]
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with no related allowance recorded	102		342
Unpaid Principal Balance with no related allowance recorded	205		939
Average Recorded Investment with no related allowance recorded	222	1,400
Interest Income Recognized with no related allowance recorded		4
Recorded Investment with an allowance recorded	1,039		731
Unpaid Principal Balance with an allowance recorded	1,207		804
Related Allowance	98		91
Average Recorded Investment with an allowance recorded	885	1,536
Interest Income Recognized with an allowance recorded	14	10
Recorded Investment	1,141		1,073
Unpaid Principal Balance	1,412		1,743
Average Recorded Investment	1,107	2,936
Interest Income Recognized	14	14
Residential Real Estate [Member]
Impaired and Restructured Loans with or without related allowance recorded
Recorded Investment with no related allowance recorded			301
Unpaid Principal Balance with no related allowance recorded			292
Average Recorded Investment with no related allowance recorded	151	49
Interest Income Recognized with no related allowance recorded		1
Recorded Investment with an allowance recorded	2,546		2,682
Unpaid Principal Balance with an allowance recorded	2,495		2,711
Related Allowance	276		296
Average Recorded Investment with an allowance recorded	2,614	2,545
Interest Income Recognized with an allowance recorded	26	24
Recorded Investment	2,546		2,983
Unpaid Principal Balance	2,495		$ 3,003
Average Recorded Investment	2,765	2,594
Interest Income Recognized	$ 26	$ 25

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