DERIVATIVES - Additional Information (Details) $ in Thousands	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($) entity
Derivative [Line Items]
Derivative, Notional Amount	$ 20,305,538	$ 19,828,103
Number of counterparties | entity	6	6
Derivative liabilities	$ 301,938	$ 357,698
Derivative Liability, Fair Value of Collateral, net of restricted cash	102,100	132,200
Derivative Liability, Fair Value of Collateral	128,200	157,200
Restricted Cash	$ 26,100	$ 25,000
Foreign Exchange
Derivative [Line Items]
Number of counterparties | entity	5	5
Credit Risk Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 386,800	$ 379,300
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	32,000	12,000
Other Credit Derivatives [Member]
Derivative [Line Items]
Derivative, Notional Amount	27,500	15,300
Credit Risk Derivative Liabilities, at Fair Value	500
Credit Risk Derivative Assets, at Fair Value		(4,300)
Derivative
Derivative [Line Items]
Derivative liabilities	107,700	145,800
Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount		7,700,000
Derivative liabilities	21,500	17,300
Accrued interest and other liabilities | Derivative
Derivative [Line Items]
Derivative, Notional Amount	2,200,000	$ 2,200,000
Accrued interest and other liabilities | Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount	$ 7,900,000