LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	$ 43,981	$ 38,117	$ 43,436	$ 37,588
(Charge-offs)	(887)	(580)	(1,820)	(1,286)
Recoveries	98	101	345	279
Provision (Benefit) for Credit Losses on Loans Receivable	2,349	2,905	3,580	3,962
Ending Allowance	45,541	40,543	45,541	40,543
Farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	129	186	159	151
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	11	5	(19)	40
Ending Allowance	140	191	140	191
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,546	3,595	2,905	3,339
(Charge-offs)	0	0	(26)	(21)
Recoveries	7	2	15	9
Provision (Benefit) for Credit Losses on Loans Receivable	598	117	257	387
Ending Allowance	3,151	3,714	3,151	3,714
Agricultural production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3	10	6	9
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	2	(3)	(1)	(2)
Ending Allowance	5	7	5	7
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,943	9,090	9,766	8,837
(Charge-offs)	0	(14)	(46)	(85)
Recoveries	0	13	145	91
Provision (Benefit) for Credit Losses on Loans Receivable	(284)	466	(1,206)	712
Ending Allowance	8,659	9,555	8,659	9,555
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,848	1,828	1,863	1,649
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	458	(163)	443	16
Ending Allowance	2,306	1,665	2,306	1,665
Other loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	594	143	456	149
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	139	24	277	18
Ending Allowance	733	167	733	167
Other construction loans and all land development and other land loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,394	2,050	3,253	2,198
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	197	278	338	130
Ending Allowance	3,591	2,328	3,591	2,328
Multifamily (5 or more) residential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,535	2,236	2,353	2,289
(Charge-offs)	0	0	(65)	0
Recoveries	2	0	2	0
Provision (Benefit) for Credit Losses on Loans Receivable	(924)	41	(677)	(12)
Ending Allowance	1,613	2,277	1,613	2,277
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,259	6,411	7,653	6,481
(Charge-offs)	(248)	0	(248)	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	966	337	1,572	267
Ending Allowance	8,977	6,748	8,977	6,748
1-4 Family Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	398	210	327	158
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	10	26	81	78
Ending Allowance	408	236	408	236
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,158	1,181	1,173	1,169
(Charge-offs)	0	0	0	0
Recoveries	2	2	3	10
Provision (Benefit) for Credit Losses on Loans Receivable	(191)	170	(207)	174
Ending Allowance	969	1,353	969	1,353
Residential Mortgages secured by first liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,851	6,905	8,484	6,943
(Charge-offs)	0	0	(7)	(47)
Recoveries	3	0	3	12
Provision (Benefit) for Credit Losses on Loans Receivable	396	759	770	756
Ending Allowance	9,250	7,664	9,250	7,664
Residential Mortgages secured by junior liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,275	552	1,035	546
(Charge-offs)	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	303	76	543	82
Ending Allowance	1,578	628	1,578	628
Other revolving credit plans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	830	547	722	528
(Charge-offs)	(36)	(19)	(58)	(45)
Recoveries	12	28	17	34
Provision (Benefit) for Credit Losses on Loans Receivable	125	42	250	81
Ending Allowance	931	598	931	598
Automobile
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	330	254	271	263
(Charge-offs)	(5)	(6)	(10)	(13)
Recoveries	0	0	0	0
Provision (Benefit) for Credit Losses on Loans Receivable	51	(6)	115	(8)
Ending Allowance	376	242	376	242
Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,561	2,569	2,665	2,546
(Charge-offs)	(442)	(369)	(982)	(770)
Recoveries	31	19	74	41
Provision (Benefit) for Credit Losses on Loans Receivable	411	485	804	887
Ending Allowance	2,561	2,704	2,561	2,704
Credit cards
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	73	103	67	92
(Charge-offs)	(18)	(45)	(80)	(59)
Recoveries	6	4	7	8
Provision (Benefit) for Credit Losses on Loans Receivable	11	48	78	69
Ending Allowance	72	110	72	110
Overdrafts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	254	247	278	241
(Charge-offs)	(138)	(127)	(298)	(246)
Recoveries	35	33	79	74
Provision (Benefit) for Credit Losses on Loans Receivable	70	203	162	287
Ending Allowance	$ 221	$ 356	$ 221	$ 356