ALLOWANCE FOR CREDIT LOSSES - Credit risk profile of loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Current period gross charge offs, Total	$ 15,496	$ 15,706	$ 8,216
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	348,183	424,209
Prior year	317,948	217,824
Two years before current year	151,284	145,349
Three years before current year	91,864	54,134
Four years before current year	33,181	35,258
Prior	131,427	129,134
Revolving Loans	72,484	69,873
Total loans	1,146,371	1,075,781
Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	232	937
Prior year	1,189	990
Two years before current year	756	681
Three years before current year	757	932
Four years before current year	598	366
Prior	1,735	2,040
Revolving Loans	1	178
Total loans	5,268	6,124
Total other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	348,415	425,146
Prior year	319,137	218,814
Two years before current year	152,040	146,030
Three years before current year	92,621	55,066
Four years before current year	33,779	35,624
Prior	133,162	131,174
Revolving Loans	72,485	70,051
Total loans	1,151,639	1,081,905
Residential | First Liens [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	49,146	71,713
Prior year	71,073	70,197
Two years before current year	65,232	45,080
Three years before current year	36,816	17,109
Four years before current year	15,242	20,358
Prior	119,591	119,270
Revolving Loans	1,066	3,245
Total loans	358,166	346,972
Current period gross charge offs, Prior	167
Current period gross charge offs, Total	167
Residential | First Liens [Member] | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	49,146	71,607
Prior year	70,952	70,197
Two years before current year	65,232	45,080
Three years before current year	36,751	16,968
Four years before current year	15,185	20,258
Prior	118,087	117,488
Revolving Loans	1,066	3,245
Total loans	356,419	344,843
Residential | First Liens [Member] | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		106
Prior year	121
Three years before current year	65	141
Four years before current year	57	100
Prior	1,504	1,782
Total loans	1,747	2,129
Residential | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	61	1,995
Prior year	90	943
Two years before current year		86
Three years before current year	24	115
Four years before current year	378	69
Prior	926	860
Revolving Loans	64,102	60,051
Total loans	65,581	64,119
Residential | Home Equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	61	1,995
Prior year	68	943
Two years before current year		8
Three years before current year	7	115
Four years before current year	378	55
Prior	866	820
Revolving Loans	64,102	59,875
Total loans	65,482	63,811
Residential | Home Equity | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year	22
Two years before current year		78
Three years before current year	17
Four years before current year		14
Prior	60	40
Revolving Loans		176
Total loans	99	308
Residential | Junior Liens [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	15,050	19,074
Prior year	15,484	10,489
Two years before current year	8,293	7,584
Three years before current year	5,661	5,920
Four years before current year	4,280	5,505
Prior	8,197	6,336
Revolving Loans	1,698	1,928
Total loans	58,663	56,836
Current period gross charge offs, 2019	24
Current period gross charge offs, Prior	24
Current period gross charge offs, Total	48
Residential | Junior Liens [Member] | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	15,050	19,074
Prior year	15,431	10,485
Two years before current year	8,248	7,507
Three years before current year	5,557	5,830
Four years before current year	4,280	5,366
Prior	8,094	6,195
Revolving Loans	1,698	1,928
Total loans	58,358	56,385
Residential | Junior Liens [Member] | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year	53	4
Two years before current year	45	77
Three years before current year	104	90
Four years before current year		139
Prior	103	141
Total loans	305	451
Residential | All Other Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	6,432	11,542
Prior year	9,477	9,923
Two years before current year	3,146	501
Three years before current year	421	1,340
Four years before current year	1,031	533
Prior	1,549	1,600
Revolving Loans	415
Total loans	22,471	25,439
Current period gross charge offs, Prior	1
Current period gross charge offs, Total	1
Residential | All Other Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	6,432	11,542
Prior year	9,477	9,923
Two years before current year	3,100	501
Three years before current year	421	915
Four years before current year	641	498
Prior	1,511	1,582
Revolving Loans	415
Total loans	21,997	24,961
Residential | All Other Residential | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Two years before current year	46
Three years before current year		425
Four years before current year	390	35
Prior	38	18
Total loans	474	478
Residential | Motor Vehicle
Financing Receivable, Credit Quality Indicator [Line Items]
Current period gross charge offs, 2023	841
Current period gross charge offs, 2022	7,722
Current period gross charge offs, 2021	3,101
Current period gross charge offs, 2020	1,448
Current period gross charge offs, 2019	499
Current period gross charge offs, Prior	174
Current period gross charge offs, Total	13,785
Residential | All Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current period gross charge offs, 2023	61
Current period gross charge offs, 2022	213
Current period gross charge offs, 2021	61
Current period gross charge offs, 2020	37
Current period gross charge offs, 2019	3
Current period gross charge offs, Prior	5
Current period gross charge offs, Revolving Loans	149
Current period gross charge offs, Total	529
Consumer | Motor Vehicle
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	265,165	307,378
Prior year	216,098	119,101
Two years before current year	71,446	88,581
Three years before current year	47,471	29,241
Four years before current year	12,172	8,718
Prior	2,207	2,277
Revolving Loans		6
Total loans	614,559	555,302
Consumer | Motor Vehicle | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	264,933	306,565
Prior year	215,125	118,362
Two years before current year	70,926	88,144
Three years before current year	46,939	29,004
Four years before current year	12,038	8,652
Prior	2,177	2,230
Revolving Loans		6
Total loans	612,138	552,963
Consumer | Motor Vehicle | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	232	813
Prior year	973	739
Two years before current year	520	437
Three years before current year	532	237
Four years before current year	134	66
Prior	30	47
Total loans	2,421	2,339
Consumer | All Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	12,561	13,444
Prior year	6,915	8,161
Two years before current year	3,923	4,198
Three years before current year	2,228	1,341
Four years before current year	676	441
Prior	692	831
Revolving Loans	5,204	4,821
Total loans	32,199	33,237
Consumer | All Other Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	12,561	13,426
Prior year	6,895	7,914
Two years before current year	3,778	4,109
Three years before current year	2,189	1,302
Four years before current year	659	429
Prior	692	819
Revolving Loans	5,203	4,819
Total loans	31,977	32,818
Consumer | All Other Consumer | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		18
Prior year	20	247
Two years before current year	145	89
Three years before current year	39	39
Four years before current year	17	12
Prior		12
Revolving Loans	1	2
Total loans	$ 222	$ 419