LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	$ 4,257,316	$ 4,231,742
Loans receivable	4,301,297	4,275,178
1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	54,804	51,171
Total	0
Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	124,308	124,892
Total	0
Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	949,691	942,531
Total	7
Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	79,125	74,638
Total	0
Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	38,241	36,372
Total	22
Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	24,706	21,806
Total	5
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	48,009	49,144
Total	540
Credit Card Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	12,122	10,825
Total	62
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	1,313,260	1,294,785
Loans receivable	1,313,260	1,294,785
Performing \| 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		51,171
Loans receivable	54,804	51,171
Performing \| Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		124,417
Loans receivable	123,783	124,417
Performing \| Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		938,154
Loans receivable	945,364	938,154
Performing \| Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		74,547
Loans receivable	79,028	74,547
Performing \| Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		36,346
Loans receivable	38,200	36,346
Performing \| Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		21,787
Loans receivable	24,691	21,787
Performing \| Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		48,363
Loans receivable	47,390	48,363
Performing \| Credit Card Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	12,039	10,817
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	5,624	5,769
Loans receivable	5,624	5,769
Nonperforming \| 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		0
Loans receivable	0	0
Nonperforming \| Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		475
Loans receivable	525	475
Nonperforming \| Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		4,377
Loans receivable	4,327	4,377
Nonperforming \| Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		91
Loans receivable	97	91
Nonperforming \| Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		26
Loans receivable	41	26
Nonperforming \| Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		19
Loans receivable	15	19
Nonperforming \| Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable		781
Loans receivable	619	781
Nonperforming \| Credit Card Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	83	8
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	1,318,884	1,300,554
Loans receivable	1,318,884	1,300,554
Total \| 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	54,804	51,171
Loans receivable	54,804	51,171
Total \| Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	124,308	124,892
Loans receivable	124,308	124,892
Total \| Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	949,691	942,531
Loans receivable	949,691	942,531
Total \| Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	79,125	74,638
Loans receivable	79,125	74,638
Total \| Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	38,241	36,372
Loans receivable	38,241	36,372
Total \| Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	24,706	21,806
Loans receivable	24,706	21,806
Total \| Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans receivable	48,009	49,144
Loans receivable	$ 48,009	$ 49,144

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity (Details) - USD ($)
$ in Thousands