Loans, Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 5,821	$ 12,550
Real Estate [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	3,511	6,147
Real Estate [Member] | Construction & Land Development [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	316	371
Real Estate [Member] | Farmland [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	492	65
Real Estate [Member] | 1 - 4 Family [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	2,094	1,953
Real Estate [Member] | Multifamily [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	0	0
Real Estate [Member] | Non-Farm Non-Residential [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	609	3,758
Non-Real Estate [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	2,310	6,403
Non-Real Estate [Member] | Agricultural [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	1,898	1,496
Non-Real Estate [Member] | Commercial and Industrial [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	320	4,826
Non-Real Estate [Member] | Consumer and Other [Member]
Summary of nonaccrual loans by class [Abstract]
Nonaccrual loans	$ 92	$ 81