LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Credit Exposure in Company Loan Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	$ 53,842	$ 288,326
Credit Exposure 2023	281,192	833,709
Credit Exposure 2022	784,895	451,802
Credit Exposure 2021	431,750	159,704
Credit Exposure 2020	153,922	108,230
Credit Exposure Prior	408,976	320,588
Revolving Loans Amortized Cost	150,680	160,217
Total	2,265,257	2,322,576
Credit Exposure 2024.Charge - offs	(59)	(615)
Credit Exposure 2023.Charge - offs	(20)	(38)
Credit Exposure 2022.Charge - offs	(8)	(76)
Credit Exposure 2021.Charge - offs		(52)
Credit Exposure 2020.Charge - offs	(216)	(36)
Credit Exposure Prior.Charge - offs	(7)	(94)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs		(293)
Total	(310)	(1,204)
Credit Exposure 2024, Recoveries	17	61
Credit Exposure 2022, Recoveries		4
Credit Exposure 2021, Recoveries	2	1
Credit Exposure 2020, Recoveries	3
Credit Exposure Prior, Recoveries	178	29
Credit Exposure Revolving Loans Amortized Cost, Recoveries		55
Total	200	150
Credit Exposure 2024,Current period net	(42)	(554)
Credit Exposure 2023,Current period net	(20)	(38)
Credit Exposure 2022,Current period net	(8)	(72)
Credit Exposure 2021,Current period net	2	(51)
Credit Exposure 2020,Current period net	(213)	(36)
Credit Exposure Prior,Current period net	171	(65)
Credit Exposure Revolving Loans Amortized Cost,Current period net		(238)
Total	(110)	(1,054)
Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	53,769	288,301
Credit Exposure 2023	280,463	810,203
Credit Exposure 2022	770,610	441,607
Credit Exposure 2021	422,873	158,291
Credit Exposure 2020	152,427	107,314
Credit Exposure Prior	400,004	316,988
Revolving Loans Amortized Cost	150,502	159,933
Total	2,230,648	2,282,637
Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024		6
Credit Exposure 2023	27	7,042
Credit Exposure 2022	12,341	137
Credit Exposure 2021	160	958
Credit Exposure 2020		147
Credit Exposure Prior	4,604	1,196
Revolving Loans Amortized Cost		250
Total	17,132	9,736
Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	490	16,210
Credit Exposure 2022	1,738	6,950
Credit Exposure 2021	7,144	370
Credit Exposure 2020	990	446
Credit Exposure Prior	954	635
Total	11,316	24,611
Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	73	19
Credit Exposure 2023	212	254
Credit Exposure 2022	206	3,108
Credit Exposure 2021	1,573	85
Credit Exposure 2020	505	323
Credit Exposure Prior	3,414	1,769
Revolving Loans Amortized Cost	178	34
Total	6,161	5,592
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	7,894	42,646
Credit Exposure 2023	37,031	72,711
Credit Exposure 2022	65,788	39,988
Credit Exposure 2021	36,866	14,199
Credit Exposure 2020	13,120	8,766
Credit Exposure Prior	19,928	12,756
Revolving Loans Amortized Cost	88,933	96,499
Total	269,560	287,565
Credit Exposure 2024.Charge - offs		(79)
Credit Exposure 2022.Charge - offs		(25)
Credit Exposure 2021.Charge - offs		(41)
Credit Exposure 2020.Charge - offs	(216)	(31)
Credit Exposure Prior.Charge - offs		(4)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs		(293)
Total	(216)	(473)
Credit Exposure Prior, Recoveries	174	4
Credit Exposure Revolving Loans Amortized Cost, Recoveries		15
Total	174	19
Credit Exposure 2024,Current period net		(79)
Credit Exposure 2022,Current period net		(25)
Credit Exposure 2021,Current period net		(41)
Credit Exposure 2020,Current period net	(216)	(31)
Credit Exposure Prior,Current period net	174
Credit Exposure Revolving Loans Amortized Cost,Current period net		(278)
Total	(42)	(454)
Commercial and industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	7,894	42,646
Credit Exposure 2023	36,490	72,376
Credit Exposure 2022	65,398	38,328
Credit Exposure 2021	36,745	12,864
Credit Exposure 2020	12,123	8,249
Credit Exposure Prior	19,193	12,524
Revolving Loans Amortized Cost	88,921	96,215
Total	266,764	283,202
Commercial and industrial | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		16
Credit Exposure 2022	9	132
Credit Exposure 2021	88	958
Credit Exposure 2020		147
Credit Exposure Prior	82
Revolving Loans Amortized Cost		250
Total	179	1,503
Commercial and industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	490	190
Credit Exposure 2022	255
Credit Exposure 2021	33	370
Credit Exposure 2020	990	370
Credit Exposure Prior	566	153
Total	2,334	1,083
Commercial and industrial | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	51	129
Credit Exposure 2022	126	1,528
Credit Exposure 2021		7
Credit Exposure 2020	7
Credit Exposure Prior	87	79
Revolving Loans Amortized Cost	12	34
Total	283	1,777
Construction and development
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	12,839	86,641
Credit Exposure 2023	78,917	112,609
Credit Exposure 2022	94,626	62,548
Credit Exposure 2021	55,898	7,074
Credit Exposure 2020	6,243	5,915
Credit Exposure Prior	18,153	12,615
Revolving Loans Amortized Cost	6,624	9,237
Total	273,300	296,639
Construction and development | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	12,766	86,641
Credit Exposure 2023	78,785	112,347
Credit Exposure 2022	94,439	62,548
Credit Exposure 2021	55,898	7,074
Credit Exposure 2020	6,243	5,915
Credit Exposure Prior	18,042	12,504
Revolving Loans Amortized Cost	6,624	9,237
Total	272,797	296,266
Construction and development | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		189
Credit Exposure 2022	187
Credit Exposure Prior	67	67
Total	254	256
Construction and development | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	73
Credit Exposure 2023	132	73
Credit Exposure Prior	44	44
Total	249	117
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	10,388	46,655
Credit Exposure 2023	55,208	391,764
Credit Exposure 2022	373,144	156,486
Credit Exposure 2021	153,551	81,765
Credit Exposure 2020	79,919	54,181
Credit Exposure Prior	219,782	177,279
Revolving Loans Amortized Cost	14,692	15,065
Total	906,684	923,195
Credit Exposure 2024.Charge - offs		(190)
Credit Exposure Prior.Charge - offs		(87)
Total		(277)
Credit Exposure 2024,Current period net		(190)
Credit Exposure Prior,Current period net		(87)
Total		(277)
Commercial real estate | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	10,388	46,655
Credit Exposure 2023	55,208	368,933
Credit Exposure 2022	359,523	149,536
Credit Exposure 2021	146,488	81,765
Credit Exposure 2020	79,919	54,100
Credit Exposure Prior	215,062	176,509
Revolving Loans Amortized Cost	14,692	15,065
Total	881,280	892,563
Commercial real estate | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		7,000
Credit Exposure 2022	12,325
Credit Exposure Prior	4,494	333
Total	16,819	7,333
Commercial real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		15,831
Credit Exposure 2022	1,296	6,950
Credit Exposure 2021	7,063
Credit Exposure 2020		49
Credit Exposure Prior	226	337
Total	8,585	23,167
Commercial real estate | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2020		32
Credit Exposure Prior		100
Total		132
Farmland
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	1,089	25,009
Credit Exposure 2023	23,045	77,371
Credit Exposure 2022	73,513	46,817
Credit Exposure 2021	45,489	8,556
Credit Exposure 2020	8,093	5,626
Credit Exposure Prior	20,814	16,067
Revolving Loans Amortized Cost	8,459	6,849
Total	180,502	186,295
Farmland | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	1,089	25,009
Credit Exposure 2023	23,045	77,371
Credit Exposure 2022	73,513	46,817
Credit Exposure 2021	45,185	8,556
Credit Exposure 2020	7,989	5,599
Credit Exposure Prior	20,445	15,850
Revolving Loans Amortized Cost	8,459	6,849
Total	179,725	186,051
Farmland | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2021	48
Credit Exposure 2020		27
Credit Exposure Prior	76	53
Total	124	80
Farmland | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2021	256
Credit Exposure 2020	104
Credit Exposure Prior	293	164
Total	653	164
1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	14,126	57,348
Credit Exposure 2023	62,059	143,992
Credit Exposure 2022	143,318	122,213
Credit Exposure 2021	118,839	42,588
Credit Exposure 2020	41,518	28,939
Credit Exposure Prior	121,433	97,377
Revolving Loans Amortized Cost	22,280	22,146
Total	523,573	514,603
1-4 family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	14,126	57,348
Credit Exposure 2023	62,059	143,992
Credit Exposure 2022	143,318	120,964
Credit Exposure 2021	117,522	42,535
Credit Exposure 2020	41,147	28,764
Credit Exposure Prior	118,567	95,198
Revolving Loans Amortized Cost	22,114	22,146
Total	518,853	510,947
1-4 family residential | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2021	72
Credit Exposure Prior	19	863
Total	91	863
1-4 family residential | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022		1,249
Credit Exposure 2021	1,245	53
Credit Exposure 2020	371	175
Credit Exposure Prior	2,847	1,316
Revolving Loans Amortized Cost	166
Total	4,629	2,793
Multi-family residential
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024		1,984
Credit Exposure 2023	1,971	18,041
Credit Exposure 2022	19,946	16,496
Credit Exposure 2021	15,047	2,363
Credit Exposure 2020	2,337	3,862
Credit Exposure Prior	5,261	1,492
Revolving Loans Amortized Cost	7	54
Total	44,569	44,292
Multi-family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024		1,984
Credit Exposure 2023	1,971	18,041
Credit Exposure 2022	19,946	16,496
Credit Exposure 2021	15,047	2,363
Credit Exposure 2020	2,337	3,862
Credit Exposure Prior	5,261	1,492
Revolving Loans Amortized Cost	7	54
Total	44,569	44,292
Consumer and Overdrafts
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	6,817	26,186
Credit Exposure 2023	21,349	15,259
Credit Exposure 2022	12,858	5,920
Credit Exposure 2021	5,059	2,474
Credit Exposure 2020	2,056	631
Credit Exposure Prior	2,682	2,344
Revolving Loans Amortized Cost	3,830	4,488
Total	54,651	57,302
Credit Exposure 2024.Charge - offs	(59)	(346)
Credit Exposure 2023.Charge - offs	(20)	(38)
Credit Exposure 2022.Charge - offs	(8)	(51)
Credit Exposure 2021.Charge - offs		(11)
Credit Exposure 2020.Charge - offs		(5)
Credit Exposure Prior.Charge - offs	(7)
Total	(94)	(451)
Credit Exposure 2024, Recoveries	17	61
Credit Exposure 2022, Recoveries		4
Credit Exposure 2021, Recoveries	2	1
Credit Exposure 2020, Recoveries	3
Credit Exposure Prior, Recoveries	2	23
Credit Exposure Revolving Loans Amortized Cost, Recoveries		40
Total	24	129
Credit Exposure 2024,Current period net	(42)	(285)
Credit Exposure 2023,Current period net	(20)	(38)
Credit Exposure 2022,Current period net	(8)	(47)
Credit Exposure 2021,Current period net	2	(10)
Credit Exposure 2020,Current period net	3	(5)
Credit Exposure Prior,Current period net	(5)	23
Credit Exposure Revolving Loans Amortized Cost,Current period net		40
Total	(70)	(322)
Consumer and Overdrafts | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	6,817	26,161
Credit Exposure 2023	21,293	15,181
Credit Exposure 2022	12,771	5,840
Credit Exposure 2021	4,987	2,449
Credit Exposure 2020	2,033	589
Credit Exposure Prior	2,630	2,307
Revolving Loans Amortized Cost	3,830	4,488
Total	54,361	57,015
Consumer and Overdrafts | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024		6
Credit Exposure 2023	27	26
Credit Exposure 2022	7	5
Credit Exposure Prior	9
Total	43	37
Consumer and Overdrafts | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024		19
Credit Exposure 2023	29	52
Credit Exposure 2022	80	75
Credit Exposure 2021	72	25
Credit Exposure 2020	23	42
Credit Exposure Prior	43	37
Total	247	250
Agricultural
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	689	1,857
Credit Exposure 2023	1,612	1,962
Credit Exposure 2022	1,702	1,334
Credit Exposure 2021	1,001	685
Credit Exposure 2020	636	310
Credit Exposure Prior	923	658
Revolving Loans Amortized Cost	5,855	5,879
Total	12,418	12,685
Credit Exposure Prior.Charge - offs		(3)
Total		(3)
Credit Exposure Prior, Recoveries	2	2
Total	2	2
Credit Exposure Prior,Current period net	2	(1)
Total	2	(1)
Agricultural | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2024	689	1,857
Credit Exposure 2023	1,612	1,962
Credit Exposure 2022	1,702	1,078
Credit Exposure 2021	1,001	685
Credit Exposure 2020	636	236
Credit Exposure Prior	804	604
Revolving Loans Amortized Cost	5,855	5,879
Total	12,299	12,301
Agricultural | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure Prior	19	25
Total	19	25
Agricultural | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022		256
Credit Exposure 2020		74
Credit Exposure Prior	100	29
Total	$ 100	$ 359