Loans - Nonaccrual Loans and Loans Past Due over 90 Days Still Accruing Interest by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 30,359	$ 21,736
Nonaccrual With No Allowance for Credit Loss	6,723
Past Due Over 90 Days Still on Accrual	325	61
Farmland
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,844
Nonaccrual With No Allowance for Credit Loss	51
Past Due Over 90 Days Still on Accrual	0
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,781
Nonaccrual With No Allowance for Credit Loss	909
Past Due Over 90 Days Still on Accrual	0
Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual	6,657
Nonaccrual With No Allowance for Credit Loss	464
Past Due Over 90 Days Still on Accrual	0
Other construction loans and all land development and other land loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,349
Nonaccrual With No Allowance for Credit Loss	77
Past Due Over 90 Days Still on Accrual	0
Multifamily (5 or more) residential properties
Financing Receivable, Past Due [Line Items]
Nonaccrual	288
Nonaccrual With No Allowance for Credit Loss	0
Past Due Over 90 Days Still on Accrual	0
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Nonaccrual	11,932
Nonaccrual With No Allowance for Credit Loss	394
Past Due Over 90 Days Still on Accrual	0
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Nonaccrual	685
Nonaccrual With No Allowance for Credit Loss	685
Past Due Over 90 Days Still on Accrual	0
Residential Mortgages secured by first liens
Financing Receivable, Past Due [Line Items]
Nonaccrual	4,175
Nonaccrual With No Allowance for Credit Loss	3,495
Past Due Over 90 Days Still on Accrual	283
Residential Mortgages secured by junior liens
Financing Receivable, Past Due [Line Items]
Nonaccrual	114
Nonaccrual With No Allowance for Credit Loss	114
Past Due Over 90 Days Still on Accrual	0
Other revolving credit plans
Financing Receivable, Past Due [Line Items]
Nonaccrual	6
Nonaccrual With No Allowance for Credit Loss	6
Past Due Over 90 Days Still on Accrual	0
Automobile
Financing Receivable, Past Due [Line Items]
Nonaccrual	32
Nonaccrual With No Allowance for Credit Loss	32
Past Due Over 90 Days Still on Accrual	0
Other consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	496
Nonaccrual With No Allowance for Credit Loss	496
Past Due Over 90 Days Still on Accrual	8
Commercial, industrial, and agricultural
Financing Receivable, Past Due [Line Items]
Nonaccrual		11,644
Past Due Over 90 Days Still on Accrual		0
Commercial mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual		4,533
Past Due Over 90 Days Still on Accrual		0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual		4,724
Past Due Over 90 Days Still on Accrual		59
Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual		835
Past Due Over 90 Days Still on Accrual		0
Credit Cards
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0
Nonaccrual With No Allowance for Credit Loss	0
Past Due Over 90 Days Still on Accrual	$ 34	$ 2