LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	$ 37,588	$ 34,340
(Charge-offs)	(706)	(1,058)
Recoveries	178	151
Provision (Benefit) for Credit Losses on Loans	1,057
Provision (Benefit) for Credit Losses on Loans	1,600	2,122
Ending Allowance	38,117	35,555
Farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	151	221
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	35
Provision (Benefit) for Credit Losses on Loans		3
Ending Allowance	186	224
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,339	3,700
(Charge-offs)	(21)	(531)
Recoveries	7	2
Provision (Benefit) for Credit Losses on Loans	270
Provision (Benefit) for Credit Losses on Loans		(236)
Ending Allowance	3,595	2,935
Agricultural production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	9	24
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	1
Provision (Benefit) for Credit Losses on Loans		4
Ending Allowance	10	28
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,837	6,233
(Charge-offs)	(71)	(56)
Recoveries	78	5
Provision (Benefit) for Credit Losses on Loans	246
Provision (Benefit) for Credit Losses on Loans		297
Ending Allowance	9,090	6,479
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,649	998
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	179
Provision (Benefit) for Credit Losses on Loans		717
Ending Allowance	1,828	1,715
Other loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	149	68
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	(6)
Provision (Benefit) for Credit Losses on Loans		5
Ending Allowance	143	73
Other construction loans and all land development and other land loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,198	1,956
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	(148)
Provision (Benefit) for Credit Losses on Loans		50
Ending Allowance	2,050	2,006
Multifamily (5 or more) residential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,289	2,724
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	(53)
Provision (Benefit) for Credit Losses on Loans		30
Ending Allowance	2,236	2,754
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	6,481	8,658
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	(70)
Provision (Benefit) for Credit Losses on Loans		2,668
Ending Allowance	6,411	11,326
1-4 Family Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	158	82
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	52
Provision (Benefit) for Credit Losses on Loans		(15)
Ending Allowance	210	67
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,169	985
(Charge-offs)	0	0
Recoveries	8	0
Provision (Benefit) for Credit Losses on Loans	4
Provision (Benefit) for Credit Losses on Loans		(142)
Ending Allowance	1,181	843
Residential Mortgages secured by first liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	6,943	4,539
(Charge-offs)	(47)	(28)
Recoveries	12	31
Provision (Benefit) for Credit Losses on Loans	(3)
Provision (Benefit) for Credit Losses on Loans		(992)
Ending Allowance	6,905	3,550
Residential Mortgages secured by junior liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	546	241
(Charge-offs)	0	0
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	6
Provision (Benefit) for Credit Losses on Loans		(17)
Ending Allowance	552	224
Other revolving credit plans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	528	507
(Charge-offs)	(26)	(6)
Recoveries	6	2
Provision (Benefit) for Credit Losses on Loans	39
Provision (Benefit) for Credit Losses on Loans		24
Ending Allowance	547	527
Automobile
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	263	132
(Charge-offs)	(7)	(5)
Recoveries	0	0
Provision (Benefit) for Credit Losses on Loans	(2)
Provision (Benefit) for Credit Losses on Loans		55
Ending Allowance	254	182
Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,546	2,962
(Charge-offs)	(401)	(315)
Recoveries	22	48
Provision (Benefit) for Credit Losses on Loans	402
Provision (Benefit) for Credit Losses on Loans		(321)
Ending Allowance	2,569	2,374
Credit cards
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	92	66
(Charge-offs)	(14)	(33)
Recoveries	4	8
Provision (Benefit) for Credit Losses on Loans	21
Provision (Benefit) for Credit Losses on Loans		24
Ending Allowance	103	65
Overdrafts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	241	244
(Charge-offs)	(119)	(84)
Recoveries	41	55
Provision (Benefit) for Credit Losses on Loans	84
Provision (Benefit) for Credit Losses on Loans		(32)
Ending Allowance	$ 247	$ 183