LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Loan Modifications for Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 4,390	$ 7,025	$ 9,905	$ 26,545
Loan modifications	10,474	42,564	10,474	42,564
30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	494	455	494	455
60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	477	355	477	355
90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	596	932	596	932
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	8,907	40,822	8,907	40,822
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		266		266
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	2,629	1,788	5,853	7,066
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	346	4,855	2,073	18,992
Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	686	37	1,126	93
Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	729	79	853	128
Commercial and industrial, including specialized lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 1,625	$ 4,800	$ 2,943	$ 10,049
Percentage of Total by Financing Class	0.02%	0.07%	0.04%	0.15%
Interest Rate Reduction (%)	0	0	0	0
Debt Forgiven	$ 0	$ 0	$ 0	$ 0
Loan modifications	2,942	22,625	2,942	22,625
Commercial and industrial, including specialized lending | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0	0	0
Commercial and industrial, including specialized lending | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0	0	0
Commercial and industrial, including specialized lending | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	345	230	345	230
Commercial and industrial, including specialized lending | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	2,597	22,395	2,597	22,395
Commercial and industrial, including specialized lending | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		0		0
Commercial and industrial, including specialized lending | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 1,625	$ 0	$ 2,306	$ 2,000
Term Extension (in months)	3 months	0 months	5 months	1 month
Commercial and industrial, including specialized lending | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 4,800	$ 637	$ 8,049
Term Extension (in months)	0 months	10 months	6 months	8 months
Commercial and industrial, including specialized lending | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 0	$ 0	$ 0
Commercial and industrial, including specialized lending | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	0	$ 0	0
Multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 10,713
Percentage of Total by Financing Class				0.51%
Interest Rate Reduction (%)			0	0
Debt Forgiven			$ 0	$ 0
Loan modifications		10,713		10,713
Multifamily | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Multifamily | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Multifamily | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Multifamily | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		10,713		10,713
Multifamily | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				0
Multifamily | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 0
Term Extension (in months)			0 months	0 months
Multifamily | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 10,713
Term Extension (in months)			0 months	5 months
Multifamily | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 0
Multifamily | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 52
Percentage of Total by Financing Class				0.01%
Interest Rate Reduction (%)			0	0
Debt Forgiven			$ 0	$ 0
Loan modifications		52		52
Residential real estate | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Residential real estate | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Residential real estate | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0		0
Residential real estate | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		52		52
Residential real estate | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				0
Residential real estate | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 0
Term Extension (in months)			0 months	0 months
Residential real estate | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 52
Term Extension (in months)			0 months	5 months
Residential real estate | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				$ 0
Residential real estate | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans				0
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 97		$ 224
Percentage of Total by Financing Class		0.28%		0.65%
Interest Rate Reduction (%)	0	0.038	0	0.040
Debt Forgiven	$ 0	$ 0	$ 0	$ 0
Loan modifications	89	349	89	349
Manufactured housing | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	19	0	19
Manufactured housing | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	24	0	24
Manufactured housing | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	37	0	37
Manufactured housing | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	$ 89	269	$ 89	269
Manufactured housing | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		0		0
Manufactured housing | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 18		$ 96
Term Extension (in months)	0 months	115 months	0 months	78 months
Manufactured housing | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0		$ 0
Term Extension (in months)	0 months	0 months	0 months	0 months
Manufactured housing | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0		$ 0
Manufactured housing | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		79		128
Personal installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 2,765	$ 2,128	$ 6,962	$ 5,507
Percentage of Total by Financing Class	0.48%	0.47%	1.22%	1.21%
Interest Rate Reduction (%)	0.113	0.136	0.114	0.136
Debt Forgiven	$ 1,007	$ 12	$ 1,934	$ 153
Loan modifications	7,443	8,825	7,443	8,825
Personal installment | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	494	436	494	436
Personal installment | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	477	331	477	331
Personal installment | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	251	665	251	665
Personal installment | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	6,221	7,393	6,221	7,393
Personal installment | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		266		266
Personal installment | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 1,004	$ 1,770	$ 3,547	$ 4,970
Term Extension (in months)	5 months	5 months	5 months	5 months
Personal installment | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 346	$ 55	$ 1,436	$ 178
Term Extension (in months)	10 months	7 months	8 months	7 months
Personal installment | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 686	$ 37	$ 1,126	$ 93
Personal installment | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 729	$ 0	$ 853	$ 0