Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 21,754	$ 14,403
Real Estate
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	15,680	9,060
Real Estate | Construction & land development
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	968	381
Real Estate | Farmland
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	886	1,274
Real Estate | 1- 4 Family
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	5,744	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	8,082	4,646
Non-Real Estate
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	6,074	5,343
Non-Real Estate | Agricultural
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	4,895	4,800
Non-Real Estate | Commercial and industrial
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	908	327
Non-Real Estate | Consumer and other
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 271	$ 216