ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Risk Category of Loans by Loan Segment and Origination (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	$ 498,867	$ 911,943
Year Two	834,003	653,839
Year Three	606,781	552,202
Year Four	513,510	310,151
Year Five	263,486	126,843
Prior	354,007	297,056
Term Total	3,070,654	2,852,034
Revolving	1,791,606	1,858,362
Total	4,862,260	4,710,396
2023	0
2022	5,591
2021	105
2020	6
2019	330
Prior	1
Term Total	6,033
Revolving	253
Total	6,286
Other commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	6,213	27,097
Year Two	26,450	4,815
Year Three	39,302	17,911
Year Four	16,627	147
Year Five	111	931
Prior	10,852	14,145
Term Total	99,555	65,046
Revolving	21,202	48,295
Total	120,757	113,341
Working capital lines of credit loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	115
Total	115
Working capital lines of credit loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	231	2,407
Year Two	2,242	2,718
Year Three	2,543	1,601
Year Four	1,366	300
Year Five	250	0
Prior	0	0
Term Total	6,632	7,026
Revolving	612,094	644,013
Total	618,726	651,039
Non-working capital loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	5,400
2021	0
2020	0
2019	118
Prior	0
Term Total	5,518
Revolving	18
Total	5,536
Non-working capital loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	107,918	287,443
Year Two	275,349	128,642
Year Three	110,725	98,125
Year Four	81,124	48,427
Year Five	41,382	11,611
Prior	24,574	20,633
Term Total	641,072	594,881
Revolving	209,759	246,814
Total	850,831	841,695
Construction and land development loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Construction and land development loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	23,520	26,889
Year Two	15,289	19,944
Year Three	10,218	14,026
Year Four	13,306	356
Year Five	179	0
Prior	0	0
Term Total	62,512	61,215
Revolving	525,591	453,953
Total	588,103	515,168
Owner occupied loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Owner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	88,994	116,924
Year Two	132,288	186,727
Year Three	171,046	141,371
Year Four	136,732	98,172
Year Five	69,276	68,171
Prior	149,953	105,618
Term Total	748,289	716,983
Revolving	57,223	40,533
Total	805,512	757,516
Nonowner occupied loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Nonowner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	65,333	194,294
Year Two	165,517	136,214
Year Three	129,244	134,661
Year Four	131,928	91,907
Year Five	89,591	15,109
Prior	62,994	64,874
Term Total	644,607	637,059
Revolving	79,639	68,603
Total	724,246	705,662
Multifamily loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Multifamily loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	98,720	60,315
Year Two	38,445	25,741
Year Three	9,134	36,929
Year Four	36,289	35,695
Year Five	33,831	2,046
Prior	30,441	28,866
Term Total	246,860	189,592
Revolving	7,444	7,349
Total	254,304	196,941
Loans secured by farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Loans secured by farmland | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	15,727	38,604
Year Two	33,900	28,684
Year Three	26,271	31,417
Year Four	29,075	11,436
Year Five	10,124	8,145
Prior	23,325	19,798
Term Total	138,422	138,084
Revolving	38,369	63,094
Total	176,791	201,178
Loans for agricultural production
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Loans for agricultural production | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	25,929	6,987
Year Two	8,801	30,505
Year Three	28,958	29,429
Year Four	27,232	4,553
Year Five	4,111	9,248
Prior	11,513	4,539
Term Total	106,544	85,261
Revolving	91,711	145,728
Total	198,255	230,989
Other commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Closed end first mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Closed end first mortgage loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	35,748	66,172
Year Two	63,981	57,140
Year Three	52,895	32,864
Year Four	28,725	10,741
Year Five	9,087	7,098
Prior	33,715	32,808
Term Total	224,151	206,823
Revolving	4,607	5,634
Total	228,758	212,457
Open end and junior lien loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	14
2020	0
2019	0
Prior	0
Term Total	14
Revolving	0
Total	14
Open end and junior lien loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	13,422	44,609
Year Two	36,546	14,138
Year Three	11,206	3,371
Year Four	2,450	3,710
Year Five	2,852	1,600
Prior	2,557	2,252
Term Total	69,033	69,680
Revolving	116,546	107,702
Total	185,579	177,382
Residential construction loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Term Total	0
Revolving	0
Total	0
Residential construction loans: | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,041	14,463
Year Two	13,374	2,167
Year Three	1,604	897
Year Four	871	291
Year Five	276	129
Prior	1,321	1,223
Term Total	18,487	19,170
Revolving	0	0
Total	18,487	19,170
Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	191
2021	91
2020	6
2019	212
Prior	1
Term Total	501
Revolving	120
Total	621
Other consumer loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	16,071	25,739
Year Two	21,821	16,404
Year Three	13,635	9,600
Year Four	7,785	4,416
Year Five	2,416	2,755
Prior	2,762	2,300
Term Total	64,490	61,214
Revolving	27,421	26,644
Total	91,911	87,858
Pass | Other commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	6,213	27,097
Year Two	26,450	4,815
Year Three	39,302	17,911
Year Four	15,524	147
Year Five	111	931
Prior	8,059	10,985
Term Total	95,659	61,886
Revolving	21,202	48,295
Total	116,861	110,181
Pass | Working capital lines of credit loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	231	2,207
Year Two	2,042	2,718
Year Three	2,468	1,601
Year Four	1,366	0
Year Five	0	0
Prior	0	0
Term Total	6,107	6,526
Revolving	535,802	597,108
Total	541,909	603,634
Pass | Non-working capital loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	106,680	272,273
Year Two	267,890	124,600
Year Three	107,070	91,850
Year Four	73,313	47,711
Year Five	38,285	9,981
Prior	17,517	13,670
Term Total	610,755	560,085
Revolving	203,682	240,490
Total	814,437	800,575
Pass | Construction and land development loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	23,520	26,889
Year Two	15,289	19,944
Year Three	10,218	14,026
Year Four	13,306	356
Year Five	179	0
Prior	0	0
Term Total	62,512	61,215
Revolving	511,070	453,953
Total	573,582	515,168
Pass | Owner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	88,769	113,656
Year Two	131,307	179,014
Year Three	161,898	139,880
Year Four	135,249	97,353
Year Five	66,660	65,519
Prior	136,902	97,335
Term Total	720,785	692,757
Revolving	57,223	40,533
Total	778,008	733,290
Pass | Nonowner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	61,069	194,294
Year Two	165,517	125,190
Year Three	122,798	134,661
Year Four	131,928	91,907
Year Five	89,591	15,109
Prior	62,994	64,874
Term Total	633,897	626,035
Revolving	79,639	68,603
Total	713,536	694,638
Pass | Multifamily loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	78,926	38,460
Year Two	38,445	25,741
Year Three	9,134	36,929
Year Four	36,289	35,695
Year Five	33,831	2,046
Prior	30,441	28,866
Term Total	227,066	167,737
Revolving	7,444	7,349
Total	234,510	175,086
Pass | Loans secured by farmland | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	15,727	38,344
Year Two	33,900	28,684
Year Three	26,271	29,741
Year Four	29,075	9,656
Year Five	10,112	8,145
Prior	23,210	19,638
Term Total	138,295	134,208
Revolving	38,369	63,094
Total	176,664	197,302
Pass | Loans for agricultural production | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	25,929	6,040
Year Two	8,801	30,262
Year Three	28,747	22,167
Year Four	26,880	3,625
Year Five	4,111	9,248
Prior	11,513	4,539
Term Total	105,981	75,881
Revolving	91,211	143,599
Total	197,192	219,480
Pass | Closed end first mortgage loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	5,795	8,768
Year Two	10,782	12,809
Year Three	12,147	12,289
Year Four	10,249	4,805
Year Five	4,647	4,045
Prior	6,286	3,860
Term Total	49,906	46,576
Revolving	4,607	5,634
Total	54,513	52,210
Pass | Open end and junior lien loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	318	137
Year Two	136	541
Year Three	516	357
Year Four	345	63
Year Five	0	75
Prior	26	0
Term Total	1,341	1,173
Revolving	8,803	5,841
Total	10,144	7,014
Pass | Other consumer loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,955	1,344
Year Two	827	1,841
Year Three	1,586	432
Year Four	383	600
Year Five	0	0
Prior	0	948
Term Total	4,751	5,165
Revolving	16,589	16,152
Total	21,340	21,317
Special Mention | Other commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	1,103	0
Year Five	0	0
Prior	2,793	3,160
Term Total	3,896	3,160
Revolving	0	0
Total	3,896	3,160
Special Mention | Working capital lines of credit loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Term Total	0	0
Revolving	69,844	36,410
Total	69,844	36,410
Special Mention | Non-working capital loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	448
Year Two	429	1,620
Year Three	1,356	0
Year Four	2,696	109
Year Five	2,818	159
Prior	6,333	2,961
Term Total	13,632	5,297
Revolving	5,679	2,153
Total	19,311	7,450
Special Mention | Construction and land development loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0
Year Two	0
Year Three	0
Year Four	0
Year Five	0
Prior	0
Term Total	0
Revolving	14,521
Total	14,521
Special Mention | Owner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	2,960
Year Two	702	7,608
Year Three	9,148	0
Year Four	0	446
Year Five	2,257	1,491
Prior	11,890	8,054
Term Total	23,997	20,559
Revolving	0	0
Total	23,997	20,559
Special Mention | Nonowner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	4,264	0
Year Two	0	11,024
Year Three	6,446	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Term Total	10,710	11,024
Revolving	0	0
Total	10,710	11,024
Special Mention | Multifamily loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	19,794	21,855
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Term Total	19,794	21,855
Revolving	0	0
Total	19,794	21,855
Special Mention | Loans secured by farmland | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	260
Year Two	0	0
Year Three	0	1,676
Year Four	0	1,780
Year Five	12	0
Prior	0	15
Term Total	12	3,731
Revolving	0	0
Total	12	3,731
Special Mention | Loans for agricultural production | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	947
Year Two	0	243
Year Three	211	7,262
Year Four	352	928
Year Five	0	0
Prior	0	0
Term Total	563	9,380
Revolving	500	2,129
Total	1,063	11,509
Special Mention | Closed end first mortgage loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	552
Year Four	535	0
Year Five	0	0
Prior	0	0
Term Total	535	552
Revolving	0	0
Total	535	552
Substandard | Working capital lines of credit loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	200
Year Two	200	0
Year Three	75	0
Year Four	0	300
Year Five	250	0
Prior	0	0
Term Total	525	500
Revolving	6,448	10,495
Total	6,973	10,995
Substandard | Non-working capital loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	226	11,831
Year Two	4,525	872
Year Three	1,120	5,021
Year Four	4,064	194
Year Five	11	1,351
Prior	657	3,979
Term Total	10,603	23,248
Revolving	398	4,171
Total	11,001	27,419
Substandard | Owner occupied loans | Commercial Real Estate and Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	225	308
Year Two	279	105
Year Three	0	1,491
Year Four	1,483	373
Year Five	359	1,161
Prior	1,161	229
Term Total	3,507	3,667
Revolving	0	0
Total	3,507	3,667
Substandard | Loans secured by farmland | Agri-business and agricultural loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	115	145
Term Total	115	145
Revolving	0	0
Total	115	145
Substandard | Closed end first mortgage loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	96	0
Year Four	131	0
Year Five	0	83
Prior	263	1,944
Term Total	490	2,027
Revolving	0	0
Total	490	2,027
Substandard | Open end and junior lien loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	31
Year Five	28	49
Prior	48	0
Term Total	76	80
Revolving	133	111
Total	209	191
Substandard | Other consumer loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	210
Year Five	5	0
Prior	0	0
Term Total	5	210
Revolving	0	0
Total	5	210
Not Rated | Non-working capital loans | Commercial and industrial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,012	2,891
Year Two	2,505	1,550
Year Three	1,179	1,254
Year Four	1,051	413
Year Five	268	120
Prior	67	23
Term Total	6,082	6,251
Revolving	0	0
Total	6,082	6,251
Not Rated | Closed end first mortgage loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	29,953	57,404
Year Two	53,199	44,331
Year Three	40,652	20,023
Year Four	17,810	5,936
Year Five	4,440	2,970
Prior	27,166	27,004
Term Total	173,220	157,668
Revolving	0	0
Total	173,220	157,668
Not Rated | Open end and junior lien loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	13,104	44,472
Year Two	36,410	13,597
Year Three	10,690	3,014
Year Four	2,105	3,616
Year Five	2,824	1,476
Prior	2,483	2,252
Term Total	67,616	68,427
Revolving	107,610	101,750
Total	175,226	170,177
Not Rated | Residential construction loans: | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,041	14,463
Year Two	13,374	2,167
Year Three	1,604	897
Year Four	871	291
Year Five	276	129
Prior	1,321	1,223
Term Total	18,487	19,170
Revolving	0	0
Total	18,487	19,170
Not Rated | Other consumer loans | Consumer 1-4 Family Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	14,116	24,395
Year Two	20,994	14,563
Year Three	12,049	9,168
Year Four	7,402	3,606
Year Five	2,411	2,755
Prior	2,762	1,352
Term Total	59,734	55,839
Revolving	10,832	10,492
Total	$ 70,566	$ 66,331