Loans and Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	$ 0	$ 0
Loans, Total past due loans accruing	1,372	758
Loans, Non-accrual loans	2,660	2,746
Loan, Total past due and non-accrual loans	4,032	3,504
Loan, Total loans not past due	$ 419,377	$ 422,265
Percent of gross loans, 30-59 days delinquent and accruing	0.20%	0.09%
Percent of gross loans, 60-89 days delinquent and accruing	0.12%	0.09%
Percent of gross loans, 90 days or more delinquent and accruing	0.00%	0.00%
Percentage of gross loans, Total past due loans accruing	0.32%	0.18%
Percent of gross loans, Non-accrual loans	0.63%	0.64%
Percentage of Total past due and non-accrual loans	0.95%	0.82%
Percentage of Total loans not past due	99.05%	99.18%
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 852	$ 362
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	520	396
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	426	603
Loans, Non-accrual loans	484	595
Loan, Total past due and non-accrual loans	910	1,198
Loan, Total loans not past due	136,391	135,648
Residential Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	334	215
Residential Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	92	388
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	0	0
Loans, Non-accrual loans	595	599
Loan, Total past due and non-accrual loans	595	599
Loan, Total loans not past due	15,734	13,139
Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	329	0
Loans, Non-accrual loans	286	300
Loan, Total past due and non-accrual loans	615	300
Loan, Total loans not past due	114,144	117,900
Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	260	0
Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	69	0
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	173	18
Loans, Non-accrual loans	316	342
Loan, Total past due and non-accrual loans	489	360
Loan, Total loans not past due	53,613	54,146
Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	160	13
Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	13	5
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	386	55
Loans, Non-accrual loans	940	838
Loan, Total past due and non-accrual loans	1,326	893
Loan, Total loans not past due	74,798	77,431
Agriculture [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	58	55
Agriculture [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	328	0
Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	0	0
Loans, Non-accrual loans	0	0
Loan, Total past due and non-accrual loans	0	0
Loan, Total loans not past due	3,706	3,884
Municipal [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Municipal [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, 90 days or more delinquent and accruing	0	0
Loans, Total past due loans accruing	58	82
Loans, Non-accrual loans	39	72
Loan, Total past due and non-accrual loans	97	154
Loan, Total loans not past due	20,991	20,117
Consumer [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	40	79
Consumer [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 18	$ 3