Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017
Aging of recorded investment in loans by past due category and class of loans
Fair value	$ 11,976		$ 10,082
Financing Receivable, Modifications, Recorded Investment	6,819	$ 6,919		$ 7,984	$ 8,158
Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Fair value	333		347
Farmland
Aging of recorded investment in loans by past due category and class of loans
Fair value	2,119		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	111		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	1,333		1,484
Nonaccrual	10,773		13,245
Financing Receivable, Modifications, Recorded Investment	3,403		3,349
Financing Receivable, Modifications, Nonaccrual	3,484		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	1,477		1,679
Financing Receivable, Modifications, Recorded Investment	2		2
Financing Receivable, Modifications, Nonaccrual	205		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	3,265		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	171		172
Financing Receivable, Modifications, Recorded Investment	0		56
Financing Receivable, Modifications, Nonaccrual	2,371		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	179		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	1,171		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	954		1,011
Nonaccrual	3,501		3,972
Financing Receivable, Modifications, Recorded Investment	3,087		3,105
Financing Receivable, Modifications, Nonaccrual	497		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	12		8
Nonaccrual	229		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	60		137
Nonaccrual	70		134
Financing Receivable, Modifications, Recorded Investment	78		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	69		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	307		268
Nonaccrual	174		242
Financing Receivable, Modifications, Recorded Investment	3		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	0		0
Nonaccrual	467		623
Financing Receivable, Modifications, Recorded Investment	233		177
Financing Receivable, Modifications, Nonaccrual	$ 411		$ 527