LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Credit Exposure in Company Loan Portfolio (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	$ 209,249	$ 919,315
Credit Exposure 2022	851,766	557,540
Credit Exposure 2021	480,430	195,032
Credit Exposure 2020	165,983	128,777
Credit Exposure 2019	111,069	100,422
Credit Exposure Prior	338,978	301,434
Revolving Loans Amortized Cost	160,774	175,656
Total	2,318,249	2,378,176
Credit Exposure 2023.Charge - offs	(492)	(335)
Credit Exposure 2022.Charge - offs	(18)	(26)
Credit Exposure 2021.Charge - offs	(52)	(92)
Credit Exposure 2020.Charge - offs	(8)	(21)
Credit Exposure 2019.Charge - offs	(5)
Credit Exposure Prior.Charge - offs	(94)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs	(293)	(375)
Total	(962)	(849)
Credit Exposure 2023, Recoveries	42	83
Credit Exposure 2022, Recoveries		3
Credit Exposure 2021, Recoveries	3	6
Credit Exposure 2020, Recoveries	1	11
Credit Exposure 2019, Recoveries		2
Credit Exposure Prior, Recoveries	27	95
Credit Exposure Revolving Loans Amortized Cost, Recoveries	55	40
Total	128	240
Credit Exposure 2023,Current period net	(450)	(252)
Credit Exposure 2022,Current period net	(18)	(23)
Credit Exposure 2021,Current period net	(49)	(86)
Credit Exposure 2020,Current period net	(7)	(10)
Credit Exposure 2019,Current period net	(5)	2
Credit Exposure Prior,Current period net	(67)	95
Credit Exposure Revolving Loans Amortized Cost,Current period net	238	(335)
Total	(834)	(609)
Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	209,231	916,957
Credit Exposure 2022	828,274	557,131
Credit Exposure 2021	472,920	193,161
Credit Exposure 2020	164,344	127,738
Credit Exposure 2019	110,171	96,026
Credit Exposure Prior	331,456	285,125
Revolving Loans Amortized Cost	159,703	174,751
Total	2,276,099	2,350,889
Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		919
Credit Exposure 2022	7,005	135
Credit Exposure 2021	182	1,343
Credit Exposure 2020	1,366	361
Credit Exposure 2019	178	2,598
Credit Exposure Prior	1,556	3,586
Revolving Loans Amortized Cost	1,012	905
Total	11,299	9,847
Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		1,350
Credit Exposure 2022	16,271	0
Credit Exposure 2021	7,066	246
Credit Exposure 2020	158	454
Credit Exposure 2019	463	218
Credit Exposure Prior	4,181	4,324
Total	28,139	6,592
Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	18	89
Credit Exposure 2022	216	274
Credit Exposure 2021	262	282
Credit Exposure 2020	115	224
Credit Exposure 2019	257	1,580
Credit Exposure Prior	1,785	8,399
Revolving Loans Amortized Cost	59
Total	2,712	10,848
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	32,026	99,836
Credit Exposure 2022	80,085	58,018
Credit Exposure 2021	47,120	19,833
Credit Exposure 2020	14,533	12,553
Credit Exposure 2019	9,465	4,364
Credit Exposure Prior	14,077	12,930
Revolving Loans Amortized Cost	95,104	106,533
Total	292,410	314,067
Credit Exposure 2023.Charge - offs	(79)
Credit Exposure 2021.Charge - offs	(16)	(67)
Credit Exposure Prior.Charge - offs	(4)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs	(293)	(125)
Total	(392)	(192)
Credit Exposure Prior, Recoveries	4	32
Credit Exposure Revolving Loans Amortized Cost, Recoveries	15	40
Total	19	72
Credit Exposure 2023,Current period net	(79)
Credit Exposure 2021,Current period net	(16)	(67)
Credit Exposure Prior,Current period net		32
Credit Exposure Revolving Loans Amortized Cost,Current period net	(278)	(85)
Total	(373)	(120)
Commercial and industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	32,026	99,750
Credit Exposure 2022	79,790	57,854
Credit Exposure 2021	46,995	19,577
Credit Exposure 2020	14,326	11,797
Credit Exposure 2019	8,905	4,172
Credit Exposure Prior	13,823	12,907
Revolving Loans Amortized Cost	94,131	105,628
Total	289,996	311,685
Commercial and industrial | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022		131
Credit Exposure 2021	106
Credit Exposure 2020		333
Credit Exposure 2019	178
Revolving Loans Amortized Cost	914	905
Total	1,198	1,369
Commercial and industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		14
Credit Exposure 2022	240
Credit Exposure 2021		246
Credit Exposure 2020	158	423
Credit Exposure 2019	382	192
Credit Exposure Prior	163	23
Total	943	898
Commercial and industrial | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		72
Credit Exposure 2022	55	33
Credit Exposure 2021	19	10
Credit Exposure 2020	49
Credit Exposure Prior	91
Revolving Loans Amortized Cost	59
Total	273	115
Construction and development
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	60,356	180,406
Credit Exposure 2022	139,395	138,388
Credit Exposure 2021	78,337	17,361
Credit Exposure 2020	7,990	8,697
Credit Exposure 2019	6,654	4,878
Credit Exposure Prior	13,014	10,535
Revolving Loans Amortized Cost	11,738	16,870
Total	317,484	377,135
Construction and development | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	60,356	179,501
Credit Exposure 2022	139,131	138,388
Credit Exposure 2021	78,124	17,361
Credit Exposure 2020	7,990	8,697
Credit Exposure 2019	6,654	3,443
Credit Exposure Prior	12,970	10,535
Revolving Loans Amortized Cost	11,738	16,870
Total	316,963	374,795
Construction and development | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		905
Total		905
Construction and development | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022	191
Credit Exposure 2021	213
Total	404
Construction and development | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022	73
Credit Exposure 2019		1,435
Credit Exposure Prior	44
Total	117	1,435
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	32,724	348,498
Credit Exposure 2022	367,832	147,986
Credit Exposure 2021	155,842	88,448
Credit Exposure 2020	84,289	64,084
Credit Exposure 2019	55,688	53,622
Credit Exposure Prior	189,249	172,942
Revolving Loans Amortized Cost	15,697	12,007
Total	901,321	887,587
Credit Exposure 2023.Charge - offs	(179)
Credit Exposure Prior.Charge - offs	(87)
Total	(266)
Credit Exposure 2019, Recoveries		1
Total		1
Credit Exposure 2023,Current period net	(179)
Credit Exposure 2019,Current period net		1
Credit Exposure Prior,Current period net	(87)
Total	(266)	1
Commercial real estate | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	32,724	347,162
Credit Exposure 2022	344,992	147,986
Credit Exposure 2021	148,989	86,897
Credit Exposure 2020	82,926	63,988
Credit Exposure 2019	55,603	51,002
Credit Exposure Prior	184,028	158,384
Revolving Loans Amortized Cost	15,697	12,007
Total	864,959	867,426
Commercial real estate | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022	7,000
Credit Exposure 2021		1,300
Credit Exposure 2020	1,363
Credit Exposure 2019		2,594
Credit Exposure Prior	1,283	3,427
Total	9,646	7,321
Commercial real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		1,336
Credit Exposure 2022	15,840
Credit Exposure 2021	6,853
Credit Exposure 2019	53	26
Credit Exposure Prior	3,938	4,207
Total	26,684	5,569
Commercial real estate | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2021		251
Credit Exposure 2020		96
Credit Exposure 2019	32
Credit Exposure Prior		6,924
Total	32	7,271
Farmland
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	19,029	93,128
Credit Exposure 2022	81,693	51,912
Credit Exposure 2021	49,194	10,284
Credit Exposure 2020	8,725	6,677
Credit Exposure 2019	6,184	5,956
Credit Exposure Prior	16,389	11,912
Revolving Loans Amortized Cost	7,400	5,948
Total	188,614	185,817
Farmland | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	19,029	93,128
Credit Exposure 2022	81,693	51,912
Credit Exposure 2021	49,194	10,284
Credit Exposure 2020	8,725	6,646
Credit Exposure 2019	6,156	5,956
Credit Exposure Prior	16,160	11,741
Revolving Loans Amortized Cost	7,302	5,948
Total	188,259	185,615
Farmland | Special Mention
Financing Receivable Recorded Investment [Line Items]
Revolving Loans Amortized Cost	98
Total	98
Farmland | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2020		31
Credit Exposure 2019	28
Credit Exposure Prior	55	62
Total	83	93
Farmland | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure Prior	174	109
Total	174	109
1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	41,824	143,268
Credit Exposure 2022	143,644	129,105
Credit Exposure 2021	125,297	50,183
Credit Exposure 2020	44,325	30,184
Credit Exposure 2019	28,048	27,222
Credit Exposure Prior	101,492	91,143
Revolving Loans Amortized Cost	19,372	21,956
Total	504,002	493,061
Credit Exposure Prior, Recoveries		30
Total		30
Credit Exposure Prior,Current period net		30
Total		30
1-4 family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	41,824	143,268
Credit Exposure 2022	143,644	128,957
Credit Exposure 2021	125,123	50,140
Credit Exposure 2020	44,271	30,068
Credit Exposure 2019	27,866	27,104
Credit Exposure Prior	99,789	89,678
Revolving Loans Amortized Cost	19,372	21,956
Total	501,889	491,171
1-4 family residential | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2021		43
Credit Exposure Prior	273	156
Total	273	199
1-4 family residential | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022		148
Credit Exposure 2021	174
Credit Exposure 2020	54	116
Credit Exposure 2019	182	118
Credit Exposure Prior	1,430	1,309
Total	1,840	1,691
Multi-family residential
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	192	18,183
Credit Exposure 2022	18,077	18,331
Credit Exposure 2021	16,602	2,463
Credit Exposure 2020	2,389	4,216
Credit Exposure 2019	3,903	878
Credit Exposure Prior	1,553	985
Revolving Loans Amortized Cost	4	91
Total	42,720	45,147
Multi-family residential | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	192	18,183
Credit Exposure 2022	18,077	18,331
Credit Exposure 2021	16,602	2,463
Credit Exposure 2020	2,389	4,216
Credit Exposure 2019	3,903	878
Credit Exposure Prior	1,553	985
Revolving Loans Amortized Cost	4	91
Total	42,720	45,147
Consumer and Overdrafts
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	21,554	32,848
Credit Exposure 2022	18,917	11,886
Credit Exposure 2021	6,863	5,476
Credit Exposure 2020	3,011	1,875
Credit Exposure 2019	797	3,106
Credit Exposure Prior	2,499	477
Revolving Loans Amortized Cost	4,981	6,008
Total	58,622	61,676
Credit Exposure 2023.Charge - offs	(234)	(335)
Credit Exposure 2022.Charge - offs	(18)	(26)
Credit Exposure 2021.Charge - offs	(36)	(25)
Credit Exposure 2020.Charge - offs	(8)	(21)
Credit Exposure 2019.Charge - offs	(5)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs		(250)
Total	(301)	(657)
Credit Exposure 2023, Recoveries	42	83
Credit Exposure 2022, Recoveries		3
Credit Exposure 2021, Recoveries	3	6
Credit Exposure 2020, Recoveries	1	11
Credit Exposure 2019, Recoveries		1
Credit Exposure Prior, Recoveries	21	33
Credit Exposure Revolving Loans Amortized Cost, Recoveries	40
Total	107	137
Credit Exposure 2023,Current period net	(192)	(252)
Credit Exposure 2022,Current period net	(18)	(23)
Credit Exposure 2021,Current period net	(33)	(19)
Credit Exposure 2020,Current period net	(7)	(10)
Credit Exposure 2019,Current period net	(5)	1
Credit Exposure Prior,Current period net	21	33
Credit Exposure Revolving Loans Amortized Cost,Current period net	40	(250)
Total	(194)	(520)
Consumer and Overdrafts | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	21,536	32,817
Credit Exposure 2022	18,832	11,789
Credit Exposure 2021	6,718	5,455
Credit Exposure 2020	2,996	1,835
Credit Exposure 2019	754	3,079
Credit Exposure Prior	2,483	473
Revolving Loans Amortized Cost	4,981	6,008
Total	58,300	61,456
Consumer and Overdrafts | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023		14
Credit Exposure 2022	5	4
Credit Exposure 2021	76
Credit Exposure 2020	3	28
Credit Exposure 2019		4
Total	84	50
Consumer and Overdrafts | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	18	17
Credit Exposure 2022	80	93
Credit Exposure 2021	69	21
Credit Exposure 2020	12	12
Credit Exposure 2019	43	23
Credit Exposure Prior	16	4
Total	238	170
Agricultural
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	1,544	3,148
Credit Exposure 2022	2,123	1,914
Credit Exposure 2021	1,175	984
Credit Exposure 2020	721	491
Credit Exposure 2019	330	396
Credit Exposure Prior	705	510
Revolving Loans Amortized Cost	6,478	6,243
Total	13,076	13,686
Credit Exposure Prior.Charge - offs	(3)
Total	(3)
Credit Exposure Prior, Recoveries	2
Total	2
Credit Exposure Prior,Current period net	(1)
Total	(1)
Agricultural | Pass
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2023	1,544	3,148
Credit Exposure 2022	2,115	1,914
Credit Exposure 2021	1,175	984
Credit Exposure 2020	721	491
Credit Exposure 2019	330	392
Credit Exposure Prior	650	422
Revolving Loans Amortized Cost	6,478	6,243
Total	13,013	13,594
Agricultural | Special Mention
Financing Receivable Recorded Investment [Line Items]
Credit Exposure Prior		3
Total		3
Agricultural | Substandard
Financing Receivable Recorded Investment [Line Items]
Credit Exposure Prior	25	32
Total	25	32
Agricultural | Nonaccrual
Financing Receivable Recorded Investment [Line Items]
Credit Exposure 2022	8
Credit Exposure 2019		4
Credit Exposure Prior	30	53
Total	$ 38	$ 57