Loans - Schedule of Net Loans (Details) $ in Thousands	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 3,469,845		$ 3,371,789
Less: Allowance for credit losses	(36,908)	$ (35,555)	(34,340)	$ (24,529)	$ (21,915)	$ (19,473)
Net loans	3,432,937		3,337,449
Net deferred loan origination fees (costs) included in the above loan table	$ 10,514		$ 8,789
Percentage of Total	1.000		1.000
Farmland
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 20,737		$ 23,316
Less: Allowance for credit losses	$ (124)	(224)	$ (221)
Percentage of Total	0.006		0.007
Owner-occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 425,444		$ 407,924
Less: Allowance for credit losses	$ (2,880)	(2,935)	$ (3,700)
Percentage of Total	0.123		0.121
Agricultural production and other loans to farmers
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 2,411		$ 2,664
Less: Allowance for credit losses	$ (12)	(28)	$ (24)
Percentage of Total	0.001		0.001
Commercial and Industrial
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 687,333		$ 663,550
Less: Allowance for credit losses	$ (7,312)	(6,479)	$ (6,233)
Percentage of Total	0.198		0.197
Obligations (other than securities and leases) of states and political subdivisions
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 131,862		$ 132,818
Less: Allowance for credit losses	$ (2,325)	(1,715)	$ (998)
Percentage of Total	0.038		0.039
Other loans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 13,404		$ 11,961
Less: Allowance for credit losses	$ (117)	(73)	$ (68)
Percentage of Total	0.004		0.004
Other construction loans and all land development and other land loans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 240,957		$ 205,734
Less: Allowance for credit losses	$ (2,364)	(2,006)	$ (1,956)
Percentage of Total	0.069		0.061
Multifamily (5 or more) residential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 231,417		$ 212,815
Less: Allowance for credit losses	$ (2,314)	(2,754)	$ (2,724)
Percentage of Total	0.067		0.063
Non-owner occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 628,669		$ 640,945
Less: Allowance for credit losses	$ (10,162)	(11,326)	$ (8,658)
Percentage of Total	0.181		0.190
1-4 Family Construction
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 34,394		$ 27,768
Less: Allowance for credit losses	$ (110)	(67)	$ (82)
Percentage of Total	0.010		0.008
Home equity lines of credit
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 104,897		$ 109,444
Less: Allowance for credit losses	$ (1,029)	(843)	$ (985)
Percentage of Total	0.030		0.032
Residential Mortgages secured by first liens
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 795,738		$ 777,030
Less: Allowance for credit losses	$ (4,398)	(3,550)	$ (4,539)
Percentage of Total	0.229		0.230
Residential Mortgages secured by junior liens
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 55,177		$ 53,726
Less: Allowance for credit losses	$ (408)	(224)	$ (241)
Percentage of Total	0.016		0.016
Other revolving credit plans
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 24,691		$ 25,507
Less: Allowance for credit losses	$ (459)	(527)	$ (507)
Percentage of Total	0.007		0.008
Automobile
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 22,924		$ 25,344
Less: Allowance for credit losses	$ (241)	(182)	$ (132)
Percentage of Total	0.007		0.008
Other consumer
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 41,103		$ 42,792
Less: Allowance for credit losses	$ (2,402)	(2,374)	$ (2,962)
Percentage of Total	0.012		0.013
Credit cards
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 8,453		$ 8,115
Less: Allowance for credit losses	$ (68)	(65)	$ (66)	(114)	(112)	(84)
Percentage of Total	0.002		0.002
Overdrafts
Loan Portfolio By Loan Grade [Line Items]
Loans	$ 234		$ 336
Less: Allowance for credit losses	$ (183)	$ (183)	$ (244)	$ (169)	$ (183)	$ (240)
Percentage of Total	0.000		0.000