LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Nonperforming Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 4,464,834	$ 4,275,178
1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	10,688	30,451
2022	34,230	16,360
2021	10,657	2,577
2020	2,583	752
2019	719	62
Prior	60	0
Revolving Loans Amortized Cost Basis	798	969
Revolving Loans Converted to Term	0	0
Total	59,735	51,171
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2023	10,055	34,738
2022	33,034	13,654
2021	13,182	12,903
2020	10,413	8,597
2019	7,472	7,924
Prior	35,182	38,592
Revolving Loans Amortized Cost Basis	6,932	8,484
Revolving Loans Converted to Term	5,543	0
Total	121,813	124,892
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	74,767	229,842
2022	225,518	223,293
2021	212,773	159,924
2020	152,897	91,819
2019	85,690	50,003
Prior	213,062	184,089
Revolving Loans Amortized Cost Basis	3,100	3,561
Revolving Loans Converted to Term	0	0
Total	967,807	942,531
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	7
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	7
Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	19,220	31,837
2022	29,462	17,163
2021	15,631	8,326
2020	7,683	4,956
2019	4,325	3,073
Prior	10,123	8,442
Revolving Loans Amortized Cost Basis	1,541	841
Revolving Loans Converted to Term	0	0
Total	87,985	74,638
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	7,402	10,778
2022	9,693	2,820
2021	2,804	7,911
2020	7,627	2,268
2019	1,826	2,279
Prior	12,422	10,316
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	41,774	36,372
2023	0
2022	0
2021	40
2020	0
2019	0
Prior	18
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	58
Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2023	9,891	10,146
2022	8,482	4,637
2021	3,587	2,955
2020	2,084	2,356
2019	1,646	1,119
Prior	1,063	593
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	26,753	21,806
2023	0
2022	5
2021	0
2020	0
2019	5
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	10
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2023	13,173	27,102
2022	18,947	12,340
2021	8,201	5,418
2020	3,946	2,198
2019	1,764	782
Prior	1,729	1,304
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	47,760	49,144
2023	2
2022	571
2021	303
2020	73
2019	23
Prior	10
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	982
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,347,465	1,294,785
Performing | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	10,688	30,451
2022	34,230	16,360
2021	10,657	2,577
2020	2,583	752
2019	719	62
Prior	60	0
Revolving Loans Amortized Cost Basis	798	969
Revolving Loans Converted to Term	0	0
Total	59,735	51,171
Performing | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2023	10,055	34,738
2022	33,034	13,654
2021	13,182	12,903
2020	10,413	8,587
2019	7,472	7,924
Prior	35,167	38,127
Revolving Loans Amortized Cost Basis	6,932	8,484
Revolving Loans Converted to Term	5,059	0
Total	121,314	124,417
Performing | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	74,701	229,842
2022	225,421	222,522
2021	211,770	159,651
2020	152,625	91,238
2019	85,141	49,587
Prior	210,359	181,939
Revolving Loans Amortized Cost Basis	2,945	3,375
Revolving Loans Converted to Term	0	0
Total	962,962	938,154
Performing | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	19,220	31,837
2022	29,462	17,163
2021	15,631	8,326
2020	7,683	4,956
2019	4,325	3,073
Prior	10,073	8,395
Revolving Loans Amortized Cost Basis	1,497	797
Revolving Loans Converted to Term	0	0
Total	87,891	74,547
Performing | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	7,402	10,778
2022	9,693	2,820
2021	2,794	7,911
2020	7,627	2,264
2019	1,813	2,265
Prior	12,347	10,308
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	41,676	36,346
Performing | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2023	9,891	10,146
2022	8,482	4,637
2021	3,587	2,945
2020	2,076	2,349
2019	1,637	1,117
Prior	1,063	593
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	26,736	21,787
Performing | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2023	13,160	26,699
2022	18,503	12,120
2021	8,114	5,333
2020	3,932	2,176
2019	1,759	776
Prior	1,683	1,259
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	47,151	48,363
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,162	5,769
Nonperforming | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Nonperforming | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	10
2019	0	0
Prior	15	465
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	484	0
Total	499	475
Nonperforming | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	66	0
2022	97	771
2021	1,003	273
2020	272	581
2019	549	416
Prior	2,703	2,150
Revolving Loans Amortized Cost Basis	155	186
Revolving Loans Converted to Term	0	0
Total	4,845	4,377
Nonperforming | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	50	47
Revolving Loans Amortized Cost Basis	44	44
Revolving Loans Converted to Term	0	0
Total	94	91
Nonperforming | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	10	0
2020	0	4
2019	13	14
Prior	75	8
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	98	26
Nonperforming | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	10
2020	8	7
2019	9	2
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	17	19
Nonperforming | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2023	13	403
2022	444	220
2021	87	85
2020	14	22
2019	5	6
Prior	46	45
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	$ 609	$ 781