Loans, Loans Portfolio Aging Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 3,237	$ 2,125
Current	823,696	817,678
Total Loans Receivable	826,933	819,803
Total Loans Greater Than 90 Days and Accruing	141	23
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,348	1,103
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	55	165
Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,834	857
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	19
Current	38,689	41,882
Total Loans Receivable	38,689	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	0	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	1,283	295
Current	493,627	476,649
Total Loans Receivable	494,910	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	742	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	541	127
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,639	1,493
Current	257,541	264,762
Total Loans Receivable	259,180	266,255
Total Loans Greater Than 90 Days and Accruing	118	20
Residential real estate [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	518	686
Residential real estate [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28	80
Residential real estate [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,093	727
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	83	78
Current	17,496	19,183
Total Loans Receivable	17,579	19,261
Total Loans Greater Than 90 Days and Accruing	23	3
Consumer [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	33	59
Consumer [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	16
Consumer [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	23	3
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	177	125
Current	15,851	14,684
Total Loans Receivable	16,028	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	0	0
Agricultural [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	177	0
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	55	115
Current	492	518
Total Loans Receivable	547	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	55	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