Loans - Schedule of Net Loans (Details) $ in Thousands	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 3,400,984	$ 3,371,789
Less: Allowance for credit losses	(35,555)	(34,340)	$ (21,915)	$ (19,473)
Net loans	3,365,429	3,337,449
Net deferred loan origination fees (costs) included in the above loan table	$ 10,889	$ 8,789
Percentage of Total	1.000	1.000
Farmland
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 24,066	$ 23,316
Less: Allowance for credit losses	$ (224)	$ (221)
Percentage of Total	0.007	0.007
Owner-occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 408,355	$ 407,924
Less: Allowance for credit losses	$ (2,935)	$ (3,700)
Percentage of Total	0.120	0.121
Agricultural production and other loans to farmers
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 3,519	$ 2,664
Less: Allowance for credit losses	$ (28)	$ (24)
Percentage of Total	0.001	0.001
Commercial and Industrial
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 690,927	$ 663,550
Less: Allowance for credit losses	$ (6,479)	$ (6,233)
Percentage of Total	0.203	0.197
Obligations (other than securities and leases) of states and political subdivisions
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 130,859	$ 132,818
Less: Allowance for credit losses	$ (1,715)	$ (998)
Percentage of Total	0.038	0.039
Other loans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 11,413	$ 11,961
Less: Allowance for credit losses	$ (73)	$ (68)
Percentage of Total	0.003	0.004
Other construction loans and all land development and other land loans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 221,012	$ 205,734
Less: Allowance for credit losses	$ (2,006)	$ (1,956)
Percentage of Total	0.065	0.061
Multifamily (5 or more) residential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 235,702	$ 212,815
Less: Allowance for credit losses	$ (2,754)	$ (2,724)
Percentage of Total	0.069	0.063
Non-owner occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 622,765	$ 640,945
Less: Allowance for credit losses	$ (11,326)	$ (8,658)
Percentage of Total	0.183	0.190
1-4 Family Construction
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 23,667	$ 27,768
Less: Allowance for credit losses	$ (67)	$ (82)
Percentage of Total	0.007	0.008
Home equity lines of credit
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 105,754	$ 109,444
Less: Allowance for credit losses	$ (843)	$ (985)
Percentage of Total	0.031	0.032
Residential Mortgages secured by first liens
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 771,564	$ 777,030
Less: Allowance for credit losses	$ (3,550)	$ (4,539)
Percentage of Total	0.227	0.230
Residential Mortgages secured by junior liens
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 53,014	$ 53,726
Less: Allowance for credit losses	$ (224)	$ (241)
Percentage of Total	0.016	0.016
Other revolving credit plans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 25,966	$ 25,507
Less: Allowance for credit losses	$ (527)	$ (507)
Percentage of Total	0.008	0.008
Automobile
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 24,171	$ 25,344
Less: Allowance for credit losses	$ (182)	$ (132)
Percentage of Total	0.007	0.008
Other consumer
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 40,120	$ 42,792
Less: Allowance for credit losses	$ (2,374)	$ (2,962)
Percentage of Total	0.012	0.013
Credit cards
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 7,875	$ 8,115
Less: Allowance for credit losses	$ (65)	$ (66)	(112)	(84)
Percentage of Total	0.002	0.002
Overdrafts
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 235	$ 336
Less: Allowance for credit losses	$ (183)	$ (244)	$ (183)	$ (240)
Percentage of Total	0.000	0.000