LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans By Credit Quality Indicators and Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
LOANS
Loans receivable	$ 1,872,449	$ 1,848,139
Commercial | Commercial real estate - non-owner occupied
LOANS
2024	10,903	96,615
2023	97,427	187,556
2022	194,910	92,028
2021	89,123	55,408
2020	54,833	80,702
Prior	292,633	225,033
Revolving	0	0
Loans receivable	739,829	737,342
Current period gross charge-offs
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial | Commercial real estate - non-owner occupied | Pass
LOANS
2024	10,903	96,615
2023	97,427	167,484
2022	174,949	89,582
2021	86,706	55,390
2020	54,833	80,020
Prior	274,326	207,017
Revolving	0	0
Loans receivable	699,144	696,108
Commercial | Commercial real estate - non-owner occupied | Special Mention
LOANS
2024	0	0
2023	0	20,072
2022	19,961	2,446
2021	2,417	0
2020	0	116
Prior	6,068	6,188
Revolving	0	0
Loans receivable	28,446	28,822
Commercial | Commercial real estate - non-owner occupied | Substandard
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	18
2020	0	566
Prior	12,239	11,828
Revolving	0	0
Loans receivable	12,239	12,412
Commercial | Commercial real estate - non-owner occupied | Doubtful
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Commercial | Commercial Real Estate Loans Owner Occupied, Excluding Purchased Credit Impaired [ Member]
LOANS
Loans receivable	250,145	237,246
Commercial | Commercial real estate - owner occupied
LOANS
2024	15,504	39,065
2023	39,044	38,175
2022	38,553	54,657
2021	53,776	12,858
2020	12,533	17,505
Prior	90,735	74,986
Revolving	0	0
Loans receivable	250,145	237,246
Current period gross charge-offs
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial | Commercial real estate - owner occupied | Pass
LOANS
2024	15,504	33,761
2023	33,783	37,429
2022	37,808	52,090
2021	51,259	12,858
2020	12,533	17,505
Prior	87,536	71,775
Revolving	0	0
Loans receivable	238,423	225,418
Commercial | Commercial real estate - owner occupied | Special Mention
LOANS
2024	0	104
2023	0	746
2022	0	0
2021	0	0
2020	0	0
Prior	165	166
Revolving	0	0
Loans receivable	165	1,016
Commercial | Commercial real estate - owner occupied | Substandard
LOANS
2024	0	5,200
2023	5,261	0
2022	745	2,567
2021	2,517	0
2020	0	0
Prior	3,034	3,045
Revolving	0	0
Loans receivable	11,557	10,812
Commercial | Commercial real estate - owner occupied | Doubtful
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Commercial | Commercial Loans Other Than Nonowner Occupied And Owner Occupied, Excluding Purchased Credit Impaired [Member]
LOANS
Loans receivable	412,805	399,693
Commercial | All other commercial loans
LOANS
2024	16,341	58,393
2023	61,142	94,517
2022	87,492	58,106
2021	58,096	28,179
2020	27,263	17,100
Prior	40,711	26,205
Revolving	121,760	117,193
Loans receivable	412,805	399,693
Current period gross charge-offs
2024	0	0
2023	0	0
2022	0	0
2021	60	0
2020	0	0
Prior	0	0
Revolving	0	12
Total	60	12
Commercial | All other commercial loans | Pass
LOANS
2024	16,341	58,393
2023	61,142	90,560
2022	80,711	51,813
2021	51,981	27,718
2020	26,821	16,421
Prior	38,804	24,326
Revolving	111,171	107,234
Loans receivable	386,971	376,465
Commercial | All other commercial loans | Special Mention
LOANS
2024	0	0
2023	0	2,690
2022	5,464	5,043
2021	0	8
2020	7	0
Prior	397	794
Revolving	416	301
Loans receivable	6,284	8,836
Commercial | All other commercial loans | Substandard
LOANS
2024	0	0
2023	0	1,267
2022	1,317	1,250
2021	6,115	453
2020	435	679
Prior	1,510	1,085
Revolving	10,173	9,658
Loans receivable	19,550	14,392
Commercial | All other commercial loans | Doubtful
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Residential mortgage
LOANS
2024	6,467	57,300
2023	56,820	87,519
2022	85,955	56,183
2021	54,081	39,696
2020	38,514	32,770
Prior	167,826	140,246
Revolving	0	0
Loans receivable	409,663	413,714
Current period gross charge-offs
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	33
Revolving	0	0
Total	0	33
Residential mortgage | Pass
LOANS
2024	6,467	57,300
2023	56,820	87,519
2022	85,955	56,183
2021	54,081	39,411
2020	38,238	32,401
Prior	162,254	135,546
Revolving	0	0
Loans receivable	403,815	408,360
Residential mortgage | Special Mention
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Residential mortgage | Substandard
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	285
2020	276	369
Prior	5,572	4,700
Revolving	0	0
Loans receivable	5,848	5,354
Residential mortgage | Doubtful
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Consumer
LOANS
2024	1,492	6,020
2023	5,459	4,664
2022	4,091	1,949
2021	1,642	1,216
2020	1,073	176
Prior	1,043	971
Revolving	45,207	45,148
Loans receivable	60,007	60,144
Current period gross charge-offs
2024	0	0
2023	0	149
2022	86	0
2021	0	18
2020	8	3
Prior	0	3
Revolving	26	138
Total	120	311
Consumer | Pass
LOANS
2024	1,492	6,020
2023	5,459	4,664
2022	4,091	1,944
2021	1,635	1,205
2020	1,073	175
Prior	931	913
Revolving	44,671	44,312
Loans receivable	59,352	59,233
Consumer | Special Mention
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	0	0
Consumer | Substandard
LOANS
2024	0	0
2023	0	0
2022	0	5
2021	7	11
2020	0	1
Prior	112	58
Revolving	536	836
Loans receivable	655	911
Consumer | Doubtful
LOANS
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving	0	0
Loans receivable	$ 0	$ 0