LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Net Loans (Details) $ in Thousands	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 4,479,692		$ 4,468,476
Percentage of Total	1.000		1.000
Less: allowance for credit losses	$ (45,532)	$ (45,832)	$ (45,832)	$ (45,541)	$ (43,981)	$ (43,436)
Net loans receivable	4,434,160		4,422,644
Net deferred loan origination fees included in the above table	1,378		2,448
Farmland
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 32,212		$ 33,485
Percentage of Total	0.007		0.008
Less: allowance for credit losses	$ (154)	(135)	$ (138)	(140)	(129)	(159)
Owner-occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 535,128		$ 511,910
Percentage of Total	0.119		0.115
Less: allowance for credit losses	$ (5,000)	(4,473)	$ (4,131)	(3,151)	(2,546)	(2,905)
Agricultural production and other loans to farmers
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,561		$ 1,652
Percentage of Total	0		0
Less: allowance for credit losses	$ (8)	(8)	$ (7)	(5)	(3)	(6)
Commercial and Industrial
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 659,407		$ 726,442
Percentage of Total	0.147		0.163
Less: allowance for credit losses	$ (7,113)	(8,973)	$ (9,500)	(8,659)	(8,943)	(9,766)
Obligations (other than securities and leases) of states and political subdivisions
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 150,482		$ 152,201
Percentage of Total	0.034		0.034
Less: allowance for credit losses	$ (2,554)	(2,537)	$ (2,627)	(2,306)	(1,848)	(1,863)
Other loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 26,326		$ 25,507
Percentage of Total	0.006		0.006
Less: allowance for credit losses	$ (403)	(378)	$ (389)	(733)	(594)	(456)
Other construction loans and all land development and other land loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 374,702		$ 340,358
Percentage of Total	0.084		0.076
Less: allowance for credit losses	$ (3,114)	(4,255)	$ (2,830)	(3,591)	(3,394)	(3,253)
Multifamily (5 or more) residential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 324,092		$ 305,697
Percentage of Total	0.072		0.068
Less: allowance for credit losses	$ (1,410)	(1,067)	$ (1,251)	(1,613)	(2,535)	(2,353)
Non-owner occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 978,241		$ 984,033
Percentage of Total	0.218		0.220
Less: allowance for credit losses	$ (9,718)	(8,785)	$ (9,783)	(8,977)	(8,259)	(7,653)
1-4 Family Construction
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 20,408		$ 28,055
Percentage of Total	0.005		0.006
Less: allowance for credit losses	$ (147)	(303)	$ (191)	(408)	(398)	(327)
Home equity lines of credit
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 144,018		$ 130,700
Percentage of Total	0.032		0.029
Less: allowance for credit losses	$ (1,035)	(897)	$ (844)	(969)	(1,158)	(1,173)
Residential Mortgages secured by first liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,006,163		$ 1,005,335
Percentage of Total	0.225		0.225
Less: allowance for credit losses	$ (8,934)	(8,368)	$ (8,274)	(9,250)	(8,851)	(8,484)
Residential Mortgages secured by junior liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 98,085		$ 91,240
Percentage of Total	0.022		0.020
Less: allowance for credit losses	$ (1,598)	(1,431)	$ (1,487)	(1,578)	(1,275)	(1,035)
Other revolving credit plans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 41,359		$ 42,877
Percentage of Total	0.009		0.010
Less: allowance for credit losses	$ (934)	(854)	$ (977)	(931)	(830)	(722)
Automobile
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 22,387		$ 25,315
Percentage of Total	0.005		0.006
Less: allowance for credit losses	$ (287)	(304)	$ (360)	(376)	(330)	(271)
Other consumer
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 51,644		$ 51,592
Percentage of Total	0.012		0.011
Less: allowance for credit losses	$ (2,802)	(2,711)	$ (2,656)	(2,561)	(2,561)	(2,665)
Credit cards
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 13,259		$ 11,785
Percentage of Total	0.003		0.003
Less: allowance for credit losses	$ (103)	(98)	$ (95)	(72)	(73)	(67)
Overdrafts
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 218		$ 292
Percentage of Total	0		0
Less: allowance for credit losses	$ (218)	$ (255)	$ (292)	$ (221)	$ (254)	$ (278)