ALLOWANCE FOR CREDIT LOSSES - Credit risk profile of loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Nonperforming loans past due	90 days
Current period gross charge offs, Total	$ 19,289	$ 15,496	$ 15,706
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	359,398	348,183
Prior year	268,003	317,948
Two years before current year	252,293	151,284
Three years before current year	119,148	91,864
Four years before current year	64,853	33,181
Prior	152,608	131,427
Revolving Loans	94,145	72,484
Total loans	1,310,448	1,146,371
Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	176	232
Prior year	477	1,189
Two years before current year	1,349	756
Three years before current year	771	757
Four years before current year	526	598
Prior	2,371	1,735
Revolving Loans	760	1
Total loans	6,430	5,268
Total other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	359,574	348,415
Prior year	268,480	319,137
Two years before current year	253,642	152,040
Three years before current year	119,919	92,621
Four years before current year	65,379	33,779
Prior	154,979	133,162
Revolving Loans	94,905	72,485
Total loans	1,316,878	1,151,639
Residential | First Liens
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	64,953	49,146
Prior year	47,930	71,073
Two years before current year	89,205	65,232
Three years before current year	69,270	36,816
Four years before current year	37,771	15,242
Prior	138,824	119,591
Revolving Loans	2,279	1,066
Total loans	450,232	358,166
Current period gross charge offs, Prior	221	167
Current period gross charge offs, Total	221	167
Residential | First Liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	64,953	49,146
Prior year	47,930	70,952
Two years before current year	89,205	65,232
Three years before current year	69,090	36,751
Four years before current year	37,658	15,185
Prior	136,805	118,087
Revolving Loans	2,279	1,066
Total loans	447,920	356,419
Residential | First Liens | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year		121
Three years before current year	180	65
Four years before current year	113	57
Prior	2,019	1,504
Total loans	2,312	1,747
Residential | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	966	61
Prior year	562	90
Two years before current year	1,058
Three years before current year	31	24
Four years before current year	181	378
Prior	1,257	926
Revolving Loans	85,443	64,102
Total loans	89,498	65,581
Current period gross charge offs, 2022	22
Current period gross charge offs, Prior	28
Current period gross charge offs, Revolving Loans	51
Current period gross charge offs, Total	101
Residential | Home Equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	966	61
Prior year	562	68
Two years before current year	1,017
Three years before current year	31	7
Four years before current year	143	378
Prior	1,149	866
Revolving Loans	84,723	64,102
Total loans	88,591	65,482
Residential | Home Equity | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year		22
Two years before current year	41
Three years before current year		17
Four years before current year	38
Prior	108	60
Revolving Loans	720
Total loans	907	99
Residential | Junior Liens
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	16,989	15,050
Prior year	12,410	15,484
Two years before current year	12,631	8,293
Three years before current year	6,469	5,661
Four years before current year	5,260	4,280
Prior	9,375	8,197
Revolving Loans	1,578	1,698
Total loans	64,712	58,663
Current period gross charge offs, 2023	15
Current period gross charge offs, 2020		24
Current period gross charge offs, Prior		24
Current period gross charge offs, Total	15	48
Residential | Junior Liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	16,989	15,050
Prior year	12,371	15,431
Two years before current year	12,590	8,248
Three years before current year	6,431	5,557
Four years before current year	5,200	4,280
Prior	9,229	8,094
Revolving Loans	1,578	1,698
Total loans	64,388	58,358
Residential | Junior Liens | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year	39	53
Two years before current year	41	45
Three years before current year	38	104
Four years before current year	60
Prior	146	103
Total loans	324	305
Residential | All Other Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	17,542	6,432
Prior year	13,123	9,477
Two years before current year	6,960	3,146
Three years before current year	4,472	421
Four years before current year	633	1,031
Prior	1,595	1,549
Revolving Loans	53	415
Total loans	44,378	22,471
Current period gross charge offs, 2021	6
Current period gross charge offs, Prior		1
Current period gross charge offs, Total	6	1
Residential | All Other Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	17,542	6,432
Prior year	13,123	9,477
Two years before current year	6,960	3,100
Three years before current year	4,392	421
Four years before current year	628	641
Prior	1,559	1,511
Revolving Loans	53	415
Total loans	44,257	21,997
Residential | All Other Residential | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Two years before current year		46
Three years before current year	80
Four years before current year	5	390
Prior	36	38
Total loans	121	474
Residential | Motor Vehicle
Financing Receivable, Credit Quality Indicator [Line Items]
Current period gross charge offs, 2024	478
Current period gross charge offs, 2023	2,692
Current period gross charge offs, 2022	4,839
Current period gross charge offs, 2021	1,751
Current period gross charge offs, 2020	587
Current period gross charge offs, Prior	97
Current period gross charge offs, Total	10,444
Residential | All Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current period gross charge offs, 2024	50
Current period gross charge offs, 2023	197
Current period gross charge offs, 2022	121
Current period gross charge offs, 2021	22
Current period gross charge offs, 2020	16
Current period gross charge offs, Prior	24
Current period gross charge offs, Revolving Loans	182
Current period gross charge offs, Total	612
Consumer | Motor Vehicle
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	247,512	265,165
Prior year	187,480	216,098
Two years before current year	140,363	71,446
Three years before current year	37,441	47,471
Four years before current year	20,416	12,172
Prior	3,349	2,207
Revolving Loans	11
Total loans	636,572	614,559
Current period gross charge offs, 2024		841
Current period gross charge offs, 2023		7,722
Current period gross charge offs, 2022		3,101
Current period gross charge offs, 2021		1,448
Current period gross charge offs, 2020		499
Current period gross charge offs, Prior		174
Current period gross charge offs, Total		13,785
Consumer | Motor Vehicle | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	247,368	264,933
Prior year	187,134	215,125
Two years before current year	139,251	70,926
Three years before current year	37,043	46,939
Four years before current year	20,130	12,038
Prior	3,290	2,177
Revolving Loans	11
Total loans	634,227	612,138
Consumer | Motor Vehicle | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	144	232
Prior year	346	973
Two years before current year	1,112	520
Three years before current year	398	532
Four years before current year	286	134
Prior	59	30
Total loans	2,345	2,421
Consumer | All Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,612	12,561
Prior year	6,975	6,915
Two years before current year	3,425	3,923
Three years before current year	2,236	2,228
Four years before current year	1,118	676
Prior	579	692
Revolving Loans	5,541	5,204
Total loans	31,486	32,199
Current period gross charge offs, 2024		61
Current period gross charge offs, 2023		213
Current period gross charge offs, 2022		61
Current period gross charge offs, 2021		37
Current period gross charge offs, 2020		3
Current period gross charge offs, Prior		5
Current period gross charge offs, Revolving Loans		149
Current period gross charge offs, Total		529
Consumer | All Other Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,580	12,561
Prior year	6,883	6,895
Two years before current year	3,270	3,778
Three years before current year	2,161	2,189
Four years before current year	1,094	659
Prior	576	692
Revolving Loans	5,501	5,203
Total loans	31,065	31,977
Consumer | All Other Consumer | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	32
Prior year	92	20
Two years before current year	155	145
Three years before current year	75	39
Four years before current year	24	17
Prior	3
Revolving Loans	40	1
Total loans	$ 421	$ 222