LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	$ 45,541	$ 40,543	$ 43,436	$ 37,588
(Charge-offs)	(855)	(779)	(2,675)	(2,065)
Recoveries	123	469	468	748
Provision (Benefit) for Credit Losses on Loans Receivable	1,023	1,036	4,603	4,998
Ending Allowance	45,832	41,269	45,832	41,269
Farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	140	191	159	151
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	(15)	(8)	(34)	32
Ending Allowance	125	183	125	183
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,151	3,714	2,905	3,339
(Charge-offs)	0	0	(26)	(21)
Recoveries	8	3	23	12
Provision (Benefit) for Credit Losses on Loans Receivable	789	(272)	1,046	115
Ending Allowance	3,948	3,445	3,948	3,445
Agricultural production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	5	7	6	9
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	(1)	(2)	(2)	(4)
Ending Allowance	4	5	4	5
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,659	9,555	9,766	8,837
(Charge-offs)	(80)	0	(126)	(85)
Recoveries	42	32	187	123
Provision (Benefit) for Credit Losses on Loans Receivable	(1,142)	(21)	(2,348)	691
Ending Allowance	7,479	9,566	7,479	9,566
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,306	1,665	1,863	1,649
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	321	97	764	113
Ending Allowance	2,627	1,762	2,627	1,762
Other loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	733	167	456	149
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	(214)	(2)	63	16
Ending Allowance	519	165	519	165
Other construction loans and all land development and other land loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,591	2,328	3,253	2,198
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	367	208	705	338
Ending Allowance	3,958	2,536	3,958	2,536
Multifamily (5 or more) residential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,613	2,277	2,353	2,289
(Charge-offs)	0	0	(65)	0
Recoveries	0	0	2	0
Provision (Benefit) for Credit Losses on Loans Receivable	537	(171)	(140)	(183)
Ending Allowance	2,150	2,106	2,150	2,106
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,977	6,748	7,653	6,481
(Charge-offs)	(88)	(169)	(336)	(169)
Recoveries	6	336	6	336
Provision (Benefit) for Credit Losses on Loans Receivable	1,006	215	2,578	482
Ending Allowance	9,901	7,130	9,901	7,130
1-4 Family Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	408	236	327	158
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	(11)	(56)	70	22
Ending Allowance	397	180	397	180
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	969	1,353	1,173	1,169
(Charge-offs)	(10)	0	(10)	0
Recoveries	1	1	4	11
Provision (Benefit) for Credit Losses on Loans Receivable	(156)	26	(363)	200
Ending Allowance	804	1,380	804	1,380
Residential Mortgages secured by first liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	9,250	7,664	8,484	6,943
(Charge-offs)	(15)	(4)	(22)	(51)
Recoveries	0	1	3	13
Provision (Benefit) for Credit Losses on Loans Receivable	(1,241)	198	(471)	954
Ending Allowance	7,994	7,859	7,994	7,859
Residential Mortgages secured by junior liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,578	628	1,035	546
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	(59)	338	484	420
Ending Allowance	1,519	966	1,519	966
Other revolving credit plans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	931	598	722	528
(Charge-offs)	(40)	(28)	(98)	(73)
Recoveries	4	12	21	46
Provision (Benefit) for Credit Losses on Loans Receivable	97	58	347	139
Ending Allowance	992	640	992	640
Automobile
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	376	242	271	263
(Charge-offs)	(23)	(7)	(33)	(20)
Recoveries	0	2	0	2
Provision (Benefit) for Credit Losses on Loans Receivable	13	27	128	19
Ending Allowance	366	264	366	264
Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,561	2,704	2,665	2,546
(Charge-offs)	(423)	(404)	(1,405)	(1,174)
Recoveries	23	22	97	63
Provision (Benefit) for Credit Losses on Loans Receivable	481	437	1,285	1,324
Ending Allowance	2,642	2,759	2,642	2,759
Credit cards
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	72	110	67	92
(Charge-offs)	(23)	(15)	(103)	(74)
Recoveries	7	25	14	33
Provision (Benefit) for Credit Losses on Loans Receivable	24	(33)	102	36
Ending Allowance	80	87	80	87
Overdrafts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	221	356	278	241
(Charge-offs)	(153)	(152)	(451)	(398)
Recoveries	32	35	111	109
Provision (Benefit) for Credit Losses on Loans Receivable	227	(3)	389	284
Ending Allowance	$ 327	$ 236	$ 327	$ 236