LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 4,431,398	$ 4,468,476
30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	4,607	3,980
60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	6,952	3,231
Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	7,608	8,298
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	19,167	15,509
Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	4,412,231	4,452,967
Farmland
Financing Receivable, Past Due [Line Items]
Loans receivable	31,145	31,869
Farmland | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Farmland | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	178	182
Farmland | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	129
Farmland | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	178	311
Farmland | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	30,967	31,558
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Loans receivable	511,219	493,064
Owner-occupied, nonfarm nonresidential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	746	120
Owner-occupied, nonfarm nonresidential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	4,568	0
Owner-occupied, nonfarm nonresidential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	803	1,390
Owner-occupied, nonfarm nonresidential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	6,117	1,510
Owner-occupied, nonfarm nonresidential properties | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	505,102	491,554
Agricultural production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Loans receivable	1,759	1,652
Agricultural production and other loans to farmers | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Agricultural production and other loans to farmers | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Agricultural production and other loans to farmers | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Agricultural production and other loans to farmers | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Agricultural production and other loans to farmers | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,759	1,652
Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Loans receivable	658,791	726,442
Commercial and Industrial | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,550	64
Commercial and Industrial | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	469	379
Commercial and Industrial | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	152	314
Commercial and Industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	2,171	757
Commercial and Industrial | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	656,620	725,685
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Past Due [Line Items]
Loans receivable	151,139	152,201
Obligations (other than securities and leases) of states and political subdivisions | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Obligations (other than securities and leases) of states and political subdivisions | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Obligations (other than securities and leases) of states and political subdivisions | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Obligations (other than securities and leases) of states and political subdivisions | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Obligations (other than securities and leases) of states and political subdivisions | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	151,139	152,201
Other loans
Financing Receivable, Past Due [Line Items]
Loans receivable	25,129	25,507
Other loans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Other loans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Other loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Other loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Other loans | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	25,129	25,507
Other construction loans and all land development and other land loans
Financing Receivable, Past Due [Line Items]
Loans receivable	532,730	491,539
Other construction loans and all land development and other land loans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Other construction loans and all land development and other land loans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	41
Other construction loans and all land development and other land loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,567	1,612
Other construction loans and all land development and other land loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,567	1,653
Other construction loans and all land development and other land loans | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	531,163	489,886
Multifamily (5 or more) residential properties
Financing Receivable, Past Due [Line Items]
Loans receivable	248,123	254,342
Multifamily (5 or more) residential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Multifamily (5 or more) residential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	241	0
Multifamily (5 or more) residential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	300	305
Multifamily (5 or more) residential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	541	305
Multifamily (5 or more) residential properties | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	247,582	254,037
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Loans receivable	887,336	896,043
Non-owner occupied, nonfarm nonresidential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	95
Non-owner occupied, nonfarm nonresidential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	299
Non-owner occupied, nonfarm nonresidential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	2,031	2,031
Non-owner occupied, nonfarm nonresidential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	2,031	2,425
Non-owner occupied, nonfarm nonresidential properties | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	885,305	893,618
1-4 Family Construction
Financing Receivable, Past Due [Line Items]
Loans receivable	42,919	51,207
1-4 Family Construction | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
1-4 Family Construction | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
1-4 Family Construction | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
1-4 Family Construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
1-4 Family Construction | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	42,919	51,207
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Loans receivable	133,290	130,700
Home equity lines of credit | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	484	582
Home equity lines of credit | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	682
Home equity lines of credit | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	360	339
Home equity lines of credit | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	844	1,603
Home equity lines of credit | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	132,446	129,097
Residential Mortgages secured by first liens
Financing Receivable, Past Due [Line Items]
Loans receivable	989,544	990,986
Residential Mortgages secured by first liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,236	2,360
Residential Mortgages secured by first liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,208	1,094
Residential Mortgages secured by first liens | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	1,706	1,651
Residential Mortgages secured by first liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	4,150	5,105
Residential Mortgages secured by first liens | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	985,394	985,881
Residential Mortgages secured by junior liens
Financing Receivable, Past Due [Line Items]
Loans receivable	92,614	91,063
Residential Mortgages secured by junior liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	21
Residential Mortgages secured by junior liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	19	38
Residential Mortgages secured by junior liens | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	144	60
Residential Mortgages secured by junior liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	163	119
Residential Mortgages secured by junior liens | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	92,451	90,944
Other revolving credit plans
Financing Receivable, Past Due [Line Items]
Loans receivable	38,318	42,877
Other revolving credit plans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	29	114
Other revolving credit plans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	41
Other revolving credit plans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	65	14
Other revolving credit plans | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	94	169
Other revolving credit plans | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	38,224	42,708
Automobile
Financing Receivable, Past Due [Line Items]
Loans receivable	23,436	25,315
Automobile | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	19	62
Automobile | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	54	5
Automobile | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	66	67
Automobile | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	139	134
Automobile | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	23,297	25,181
Other consumer
Financing Receivable, Past Due [Line Items]
Loans receivable	50,968	51,592
Other consumer | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	414	452
Other consumer | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	208	453
Other consumer | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	365	354
Other consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	987	1,259
Other consumer | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	49,981	50,333
Credit cards
Financing Receivable, Past Due [Line Items]
Loans receivable	12,683	11,785
Credit cards | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	129	110
Credit cards | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	7	17
Credit cards | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	49	32
Credit cards | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	185	159
Credit cards | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	12,498	11,626
Overdrafts
Financing Receivable, Past Due [Line Items]
Loans receivable	255	292
Overdrafts | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Overdrafts | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Overdrafts | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Overdrafts | Total Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Overdrafts | Loans Receivable Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 255	$ 292