Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Aging of recorded investment in loans by past due category and class of loans
Fair value	$ 13,578	$ 10,082
Financing Receivable, Modifications, Recorded Investment	6,919	7,034	$ 8,158	$ 8,565
Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Fair value	339	347
Farmland
Aging of recorded investment in loans by past due category and class of loans
Fair value	2,628	2,767
Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
Agriculture
Aging of recorded investment in loans by past due category and class of loans
Fair value	332	0
All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
First Liens
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	436
Home Equity
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
Multifamily
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Fair value	0	0
Nonperforming Financing Receivable [Member]
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	660	1,484
Nonaccrual	13,206	13,245
Financing Receivable, Modifications, Recorded Investment	3,394	3,349
Financing Receivable, Modifications, Nonaccrual	3,593	3,754
Nonperforming Financing Receivable [Member] | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	41
Nonaccrual	1,638	1,679
Financing Receivable, Modifications, Recorded Investment	2	2
Financing Receivable, Modifications, Nonaccrual	209	212
Nonperforming Financing Receivable [Member] | Farmland
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	19
Nonaccrual	4,150	4,141
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	0
Nonaccrual	184	172
Financing Receivable, Modifications, Recorded Investment	0	56
Financing Receivable, Modifications, Nonaccrual	2,461	2,440
Nonperforming Financing Receivable [Member] | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	0
Nonaccrual	761	707
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	0
Nonaccrual	1,211	1,236
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | First Liens
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	139	1,011
Nonaccrual	4,180	3,972
Financing Receivable, Modifications, Recorded Investment	3,103	3,105
Financing Receivable, Modifications, Nonaccrual	498	575
Nonperforming Financing Receivable [Member] | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	29	8
Nonaccrual	221	249
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	57	137
Nonaccrual	78	134
Financing Receivable, Modifications, Recorded Investment	36	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	0
Nonaccrual	0	0
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	0	0
Nonaccrual	86	90
Financing Receivable, Modifications, Recorded Investment	0	0
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	430	268
Nonaccrual	197	242
Financing Receivable, Modifications, Recorded Investment	7	9
Financing Receivable, Modifications, Nonaccrual	0	0
Nonperforming Financing Receivable [Member] | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Loans Past Due Over 90 Day Still Accruing	5	0
Nonaccrual	500	623
Financing Receivable, Modifications, Recorded Investment	246	177
Financing Receivable, Modifications, Nonaccrual	$ 425	$ 527