Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 8,743	$ 12,550
Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,714	6,147
Real Estate | Construction & land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	311	371
Real Estate | Farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,293	65
Real Estate | 1- 4 Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	2,246	1,953
Real Estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	864	3,758
Non-Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,029	6,403
Non-Real Estate | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,651	1,496
Non-Real Estate | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	317	4,826
Non-Real Estate | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 61	$ 81