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LOANS AND LEASES - Financial Difficulty Modifications (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) loans	Sep. 30, 2023 USD ($) loans	Sep. 30, 2024 USD ($) loans	Sep. 30, 2023 USD ($) loans	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 11,473	$ 3,590	$ 28,987	$ 8,506
Finance Receivable Percentage Of Class Of Loans And Leases	0.0010	0.0003	0.0025	0.0008
Derivative liabilities	$ 274,218		$ 274,218		$ 263,131
Unused Commitments to Extend Credit	$ 3,780,350		$ 3,780,350		3,982,599
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | loans	1	4	6	5
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 100	$ 400	$ 500	$ 600
Foreign Exchange | Fair Value, Measurements, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative liabilities	182,282		182,282		145,556
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	182,282		182,282		145,556
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
Financial Difficulty Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	0	0	0	0
Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	0	0	0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0	0	0
Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	969	3,590	2,623	4,774
Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,504	$ 0	$ 26,364	$ 3,660
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	0.3 years	N/A	0.4 years	0.8 years
Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.00%	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	$ 0	$ 0	$ 72
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 2,834	$ 16,243	$ 6,395
Finance Receivable Percentage Of Class Of Loans And Leases	0.0000	0.0008	0.0044	0.0019
Unused Commitments to Extend Credit	$ 1,872,041		$ 1,872,041		1,942,868
Commercial | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	$ 0	0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0	0	0
Commercial | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	2,834	383	2,834
Commercial | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 15,860	$ 3,561
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	N/A	0.4 years	0.2 years
Commercial | Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.00%	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	$ 0	$ 0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 925	$ 756	$ 1,959	$ 1,928
Finance Receivable Percentage Of Class Of Loans And Leases	0.0007	0.0006	0.0014	0.0015
Unused Commitments to Extend Credit	$ 70,690		$ 70,690		98,686
Residential real estate | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	$ 0	0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0	0	0
Residential real estate | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	921	756	1,955	1,772
Residential real estate | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 4	$ 0	$ 4	$ 99
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	3.0 years	N/A	3.0 years	11.4 years
Residential real estate | Contractual Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.00%	0.00%	2.00%
Residential real estate | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0	$ 57
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 48	$ 0	$ 285	$ 183
Finance Receivable Percentage Of Class Of Loans And Leases	0.0001	0.0000	0.0003	0.0002
Unused Commitments to Extend Credit	$ 998,439		$ 998,439		972,474
Home equity | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	$ 0	0	$ 0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	0	0	0
Home equity | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	48	0	285	168
Home equity | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	N/A	N/A	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	$ 0	$ 0
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Interest Rate Reduction	0.00%	0.00%	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	$ 0	$ 0	$ 15
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	30,130		30,130		25,841
Construction real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,500		$ 10,500
Finance Receivable Percentage Of Class Of Loans And Leases	0.0131		0.0131
Unused Commitments to Extend Credit	$ 398,031		$ 398,031		$ 565,009
Construction real estate | 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
Construction real estate | Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0		0
Construction real estate | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,500		$ 10,500
Financing Receivable Restructured Loans Not Considered TDRs Weighted Average Term Extension	0.3 years		0.3 years
Construction real estate | 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%
Construction real estate | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0		$ 0

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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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