Loans, Loans Portfolio Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 3,419	$ 2,125
Current	807,062	817,678
Total Loans Receivable	810,481	819,803
Total Loans Greater Than 90 Days and Accruing	12	23
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,614	1,103
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	143	165
Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,662	857
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8	19
Current	40,058	41,882
Total Loans Receivable	40,066	41,901
Total Loans Greater Than 90 Days and Accruing	0	0
Commercial and industrial [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8	19
Commercial and industrial [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	823	295
Current	474,453	476,649
Total Loans Receivable	475,276	476,944
Total Loans Greater Than 90 Days and Accruing	0	0
Commercial, secured by real estate [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	201	99
Commercial, secured by real estate [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	69
Commercial, secured by real estate [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	622	127
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,084	1,493
Current	259,236	264,762
Total Loans Receivable	261,320	266,255
Total Loans Greater Than 90 Days and Accruing	12	20
Residential real estate [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,303	686
Residential real estate [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	75	80
Residential real estate [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	706	727
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	34	78
Current	17,710	19,183
Total Loans Receivable	17,744	19,261
Total Loans Greater Than 90 Days and Accruing	0	3
Consumer [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	26	59
Consumer [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8	16
Consumer [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	3
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	394	125
Current	15,072	14,684
Total Loans Receivable	15,466	14,809
Total Loans Greater Than 90 Days and Accruing	0	0
Agricultural [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	125
Agricultural [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	60	0
Agricultural [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	334	0
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	76	115
Current	533	518
Total Loans Receivable	609	633
Total Loans Greater Than 90 Days and Accruing	0	0
Other [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	76	115
Other [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Other [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 0	$ 0