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
Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 8,569	$ 5,799
Loan modifications	24,725	18,419
30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	1,946	188
60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	315	347
90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	444	153
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	22,020	17,731
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	99
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	7,243	3,347
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	565	2,206
Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	620	118
Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	42	128
Commercial and industrial, including specialized lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 6,440	$ 1,497
Percentage of Total by Financing Class	0.08%	0.02%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 0	$ 0
Loan modifications	18,629	11,179
Commercial and industrial, including specialized lending \| 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	1,325	0
Commercial and industrial, including specialized lending \| 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Commercial and industrial, including specialized lending \| 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Commercial and industrial, including specialized lending \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	17,304	11,179
Commercial and industrial, including specialized lending \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	0
Commercial and industrial, including specialized lending \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 6,440	$ 731
Term Extension (in months)	13 months	11 months
Commercial and industrial, including specialized lending \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 766
Term Extension (in months)	0 months	6 months
Commercial and industrial, including specialized lending \| Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 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
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		302
Residential real estate \| 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Residential real estate \| 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Residential real estate \| 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Residential real estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		$ 302
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 42
Percentage of Total by Financing Class	0.16%
Interest Rate Reduction (%)	0.043	0
Debt Forgiven	$ 0	$ 0
Loan modifications	42	316
Manufactured housing \| 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Manufactured housing \| 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Manufactured housing \| 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	17
Manufactured housing \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	42	$ 299
Manufactured housing \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	0
Manufactured housing \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Term Extension (in months)	40 months	0 months
Manufactured housing \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Term Extension (in months)	0 months	0 months
Manufactured housing \| Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Manufactured housing \| Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	42
Personal installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 2,087	$ 4,302
Percentage of Total by Financing Class	0.35%	0.87%
Interest Rate Reduction (%)	0.133	0.132
Debt Forgiven	$ 306	$ 73
Loan modifications	6,054	6,622
Personal installment \| 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	621	188
Personal installment \| 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	315	347
Personal installment \| 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	444	136
Personal installment \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	4,674	5,951
Personal installment \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	99
Personal installment \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 803	$ 2,616
Term Extension (in months)	5 months	5 months
Personal installment \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 565	$ 1,440
Term Extension (in months)	10 months	7 months
Personal installment \| Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 620	$ 118
Personal installment \| Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 128

LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Loan Modifications for Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Thousands