LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Net Loans (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 4,591,908		$ 4,468,476
Percentage of Total	1.000		1.000
Less: allowance for credit losses	$ (46,644)	$ (45,532)	$ (45,832)	$ (45,832)	$ (45,541)	$ (43,436)
Net loans receivable	4,545,264		4,422,644
Net deferred loan origination fees included in the above table	491		2,448
Farmland
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 31,820		$ 33,485
Percentage of Total	0.007		0.008
Less: allowance for credit losses	$ (162)	(154)	$ (138)	(125)	(140)	(159)
Owner-occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 531,499		$ 511,910
Percentage of Total	0.116		0.115
Less: allowance for credit losses	$ (5,222)	(5,000)	$ (4,131)	(3,948)	(3,151)	(2,905)
Agricultural production and other loans to farmers
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,733		$ 1,652
Percentage of Total	0		0
Less: allowance for credit losses	$ (7)	(8)	$ (7)	(4)	(5)	(6)
Commercial and Industrial
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 719,441		$ 726,442
Percentage of Total	0.157		0.163
Less: allowance for credit losses	$ (7,162)	(7,113)	$ (9,500)	(7,479)	(8,659)	(9,766)
Obligations (other than securities and leases) of states and political subdivisions
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 142,423		$ 152,201
Percentage of Total	0.031		0.034
Less: allowance for credit losses	$ (1,497)	(2,554)	$ (2,627)	(2,627)	(2,306)	(1,863)
Other loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 26,132		$ 25,507
Percentage of Total	0.006		0.006
Less: allowance for credit losses	$ (306)	(403)	$ (389)	(519)	(733)	(456)
Other construction loans and all land development and other land loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 288,628		$ 340,358
Percentage of Total	0.063		0.076
Less: allowance for credit losses	$ (2,658)	(3,114)	$ (2,830)	(3,958)	(3,591)	(3,253)
Multifamily (5 or more) residential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 408,469		$ 305,697
Percentage of Total	0.089		0.068
Less: allowance for credit losses	$ (1,875)	(1,410)	$ (1,251)	(2,150)	(1,613)	(2,353)
Non-owner occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,016,001		$ 984,033
Percentage of Total	0.221		0.220
Less: allowance for credit losses	$ (11,513)	(9,718)	$ (9,783)	(9,901)	(8,977)	(7,653)
1-4 Family Construction
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 24,599		$ 28,055
Percentage of Total	0.005		0.006
Less: allowance for credit losses	$ (189)	(147)	$ (191)	(397)	(408)	(327)
Home equity lines of credit
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 157,797		$ 130,700
Percentage of Total	0.034		0.029
Less: allowance for credit losses	$ (982)	(1,035)	$ (844)	(804)	(969)	(1,173)
Residential Mortgages secured by first liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,012,020		$ 1,005,335
Percentage of Total	0.220		0.225
Less: allowance for credit losses	$ (9,133)	(8,934)	$ (8,274)	(7,994)	(9,250)	(8,484)
Residential Mortgages secured by junior liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 100,013		$ 91,240
Percentage of Total	0.022		0.020
Less: allowance for credit losses	$ (1,365)	(1,598)	$ (1,487)	(1,519)	(1,578)	(1,035)
Other revolving credit plans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 41,630		$ 42,877
Percentage of Total	0.009		0.010
Less: allowance for credit losses	$ (960)	(934)	$ (977)	(992)	(931)	(722)
Automobile
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 22,280		$ 25,315
Percentage of Total	0.005		0.006
Less: allowance for credit losses	$ (298)	(287)	$ (360)	(366)	(376)	(271)
Other consumer
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 53,556		$ 51,592
Percentage of Total	0.012		0.011
Less: allowance for credit losses	$ (2,905)	(2,802)	$ (2,656)	(2,642)	(2,561)	(2,665)
Credit cards
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 13,574		$ 11,785
Percentage of Total	0.003		0.003
Less: allowance for credit losses	$ (117)	(103)	$ (95)	(80)	(72)	(67)
Overdrafts
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 293		$ 292
Percentage of Total	0		0
Less: allowance for credit losses	$ (293)	$ (218)	$ (292)	$ (327)	$ (221)	$ (278)