ALLOWANCE FOR CREDIT LOSSES - Other loan portfolio by risk category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Nonperforming loans past due	90 days
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 424,209	$ 324,053
Prior year	217,824	229,877
Two years before current year	145,349	96,030
Three years before current year	54,134	57,961
Four years before current year	35,258	41,151
Prior	129,134	138,311
Revolving Loans	69,873	67,282
Total Loans	1,075,781	954,665
Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	937	541
Prior year	990	585
Two years before current year	681	452
Three years before current year	932	353
Four years before current year	366	343
Prior	2,040	2,625
Revolving Loans	178	2
Total Loans	6,124	4,901
Total other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	425,146	324,594
Prior year	218,814	230,462
Two years before current year	146,030	96,482
Three years before current year	55,066	58,314
Four years before current year	35,624	41,494
Prior	131,174	140,936
Revolving Loans	70,051	67,284
Total Loans	1,081,905	959,566
Residential | First Liens
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	71,713	86,224
Prior year	70,197	49,633
Two years before current year	45,080	22,297
Three years before current year	17,109	24,446
Four years before current year	20,358	26,597
Prior	119,270	129,249
Revolving Loans	3,245	3,061
Total Loans	346,972	341,507
Residential | First Liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	71,607	86,224
Prior year	70,197	49,633
Two years before current year	45,080	22,262
Three years before current year	16,968	24,377
Four years before current year	20,258	26,437
Prior	117,488	126,828
Revolving Loans	3,245	3,061
Total Loans	344,843	338,822
Residential | First Liens | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	106
Two years before current year		35
Three years before current year	141	69
Four years before current year	100	160
Prior	1,782	2,421
Total Loans	2,129	2,685
Residential | Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	1,995	757
Prior year	943	34
Two years before current year	86	152
Three years before current year	115	719
Four years before current year	69	65
Prior	860	1,389
Revolving Loans	60,051	59,059
Total Loans	64,119	62,175
Residential | Home Equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	1,995	757
Prior year	943	9
Two years before current year	8	152
Three years before current year	115	719
Four years before current year	55	62
Prior	820	1,332
Revolving Loans	59,875	59,059
Total Loans	63,811	62,090
Residential | Home Equity | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year		25
Two years before current year	78
Four years before current year	14	3
Prior	40	57
Revolving Loans	176
Total Loans	308	85
Residential | Junior Liens
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	19,074	13,255
Prior year	10,489	10,195
Two years before current year	7,584	8,188
Three years before current year	5,920	7,985
Four years before current year	5,505	4,277
Prior	6,336	5,648
Revolving Loans	1,928	968
Total Loans	56,836	50,516
Residential | Junior Liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	19,074	13,255
Prior year	10,485	10,189
Two years before current year	7,507	8,124
Three years before current year	5,830	7,888
Four years before current year	5,366	4,158
Prior	6,195	5,554
Revolving Loans	1,928	968
Total Loans	56,385	50,136
Residential | Junior Liens | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Prior year	4	6
Two years before current year	77	64
Three years before current year	90	97
Four years before current year	139	119
Prior	141	94
Total Loans	451	380
Residential | All Other Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,542	20,218
Prior year	9,923	6,665
Two years before current year	501	1,752
Three years before current year	1,340	705
Four years before current year	533	883
Prior	1,600	1,119
Total Loans	25,439	31,342
Residential | All Other Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,542	20,218
Prior year	9,923	6,665
Two years before current year	501	1,697
Three years before current year	915	662
Four years before current year	498	883
Prior	1,582	1,092
Total Loans	24,961	31,217
Residential | All Other Residential | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Two years before current year		55
Three years before current year	425	43
Four years before current year	35
Prior	18	27
Total Loans	478	125
Consumer | Motor Vehicle
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	307,378	188,874
Prior year	119,101	155,529
Two years before current year	88,581	60,867
Three years before current year	29,241	23,476
Four years before current year	8,718	9,350
Prior	2,277	2,407
Revolving Loans	6
Total Loans	555,302	440,503
Consumer | Motor Vehicle | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	306,565	188,675
Prior year	118,362	155,156
Two years before current year	88,144	60,676
Three years before current year	29,004	23,367
Four years before current year	8,652	9,307
Prior	2,230	2,384
Revolving Loans	6
Total Loans	552,963	439,565
Consumer | Motor Vehicle | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	813	199
Prior year	739	373
Two years before current year	437	191
Three years before current year	237	109
Four years before current year	66	43
Prior	47	23
Total Loans	2,339	938
Consumer | All Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	13,444	15,266
Prior year	8,161	8,406
Two years before current year	4,198	3,226
Three years before current year	1,341	983
Four years before current year	441	322
Prior	831	1,124
Revolving Loans	4,821	4,196
Total Loans	33,237	33,523
Consumer | All Other Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	13,426	14,924
Prior year	7,914	8,225
Two years before current year	4,109	3,119
Three years before current year	1,302	948
Four years before current year	429	304
Prior	819	1,121
Revolving Loans	4,819	4,194
Total Loans	32,818	32,835
Consumer | All Other Consumer | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	18	342
Prior year	247	181
Two years before current year	89	107
Three years before current year	39	35
Four years before current year	12	18
Prior	12	3
Revolving Loans	2	2
Total Loans	$ 419	$ 688