Allowance for Loan Losses - Age Analysis of TDRs (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) contract	Dec. 31, 2018 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of troubled debt restructurings | contract	0	0
Total TDRs	$ 0	$ 1,592,000
Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,592,000
Real Estate | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Construction & land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Construction & land development | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Construction & land development | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Construction & land development | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | Non-farm non-residential | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Non-farm non-residential | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | Non-farm non-residential | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 0	$ 0