Loans, Loans Portfolio Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1,531	$ 4,446
Current	1,224,361	1,194,177
Total Loans Receivable	1,225,892	1,198,623
Total Loans Greater Than 90 Days and Accruing	0	149
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	715	2,025
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	288	850
Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	528	1,571
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	89	799
Current	71,542	77,000
Total Loans Receivable	71,631	77,799
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	59	626
Commercial and industrial [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	30	173
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	100	835
Current	797,035	739,290
Total Loans Receivable	797,135	740,125
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	54	347
Commercial, secured by real estate [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	46	141
Commercial, secured by real estate [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	347
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,140	2,487
Current	319,951	347,051
Total Loans Receivable	321,091	349,538
Total Loans Greater Than 90 Days and Accruing	0	149
Residential real estate [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	411	905
Residential real estate [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	201	536
Residential real estate [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	528	1,046
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	14
Current	24,012	17,385
Total Loans Receivable	24,039	17,399
Total Loans Greater Than 90 Days and Accruing	0	0
Consumer [Member] | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16	14
Consumer [Member] | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11	0
Consumer [Member] | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	197
Current	11,513	13,115
Total Loans Receivable	11,540	13,312
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	27	19
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	0	178
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	148	114
Current	308	336
Total Loans Receivable	456	450
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	148	114
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