Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 15,906	$ 14,403
Real Estate
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	10,741	9,060
Real Estate | Construction & land development
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	901	381
Real Estate | Farmland
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	855	1,274
Real Estate | 1- 4 Family
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	4,347	2,759
Real Estate | Multifamily
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	0	0
Real Estate | Non-farm non-residential
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	4,638	4,646
Non-Real Estate
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	5,165	5,343
Non-Real Estate | Agricultural
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	4,480	4,800
Non-Real Estate | Commercial and industrial
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	412	327
Non-Real Estate | Consumer and other
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 273	$ 216