LOANS AND LEASES - Financial Difficulty Modifications (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,590	$ 8,506
Finance Receivable Percentage Of Class Of Loans And Leases	0.0003	0.0008
Derivative liabilities	$ 370,576	$ 370,576	$ 357,698
Foreign Exchange | Fair Value, Measurements, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative liabilities	194,956	194,956	204,882
Foreign Exchange | Fair Value Measurements Using Level 1 | Fair Value, Measurements, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative liabilities	0	0	0
Foreign Exchange | Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative liabilities	194,956	194,956	204,882
Foreign Exchange | Fair Value Measurements Using Level 3 | Fair Value, Measurements, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative liabilities	0	0	$ 0
Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0
Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	3,590	4,774
Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 3,660
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	0.8 years
Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	1.65%
Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 72
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 756	$ 1,928
Finance Receivable Percentage Of Class Of Loans And Leases	0.0006	0.0015
Residential Portfolio Segment [Member] | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0
Residential Portfolio Segment [Member] | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	756	1,772
Residential Portfolio Segment [Member] | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 99
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	11.4 years
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	2.00%
Residential Portfolio Segment [Member] | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 57
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 183
Finance Receivable Percentage Of Class Of Loans And Leases	0.0000	0.0002
Home equity | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0
Home equity | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	168
Home equity | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	22.6 years
Home equity | Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.31%
Home equity | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 15
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 2,834	$ 6,395
Finance Receivable Percentage Of Class Of Loans And Leases	0.0008	0.0019
Commercial | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0
Commercial | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	2,834	2,834
Commercial | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 3,561
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	0.2 years
Commercial | Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.00%
Commercial | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0