DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	$ 370,960	$ 357,698
Derivative Liability, Fair Value, Gross Asset	(509,996)	(415,993)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(139,036)	(58,295)
Fair Value Hedges | Foreign Exchange | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	194,956	204,882
Derivative Liability, Fair Value, Gross Asset	(76,033)	(101,945)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	118,923	102,937
Fair Value Hedges | Interest Rate Swap | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	173,462	152,816
Derivative Liability, Fair Value, Gross Asset	(432,368)	(314,048)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(258,906)	(161,232)
Fair Value Hedges | Cash Flow Hedging | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	2,542	0
Derivative Liability, Fair Value, Gross Asset	(1,595)	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ 947	$ 0