DERIVATIVES - Additional Information (Details) $ in Thousands	Jun. 30, 2023 USD ($) entity	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) entity
Derivative [Line Items]
Derivative, Notional Amount	$ 19,137,369		$ 19,828,103
Number of counterparties | entity	6		6
Derivative liabilities	$ 304,302		$ 357,698
Derivative Liability, Fair Value of Collateral, net of restricted cash	142,100		132,200
Derivative Liability, Fair Value of Collateral	166,000		157,200
Restricted Cash	23,900		25,000
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	$ (331)	$ 0	$ 0
Foreign Exchange
Derivative [Line Items]
Number of counterparties | entity	5		5
Credit Risk Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 198,700		$ 246,800
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	40,100		12,000
Other Credit Derivatives [Member]
Derivative [Line Items]
Derivative, Notional Amount	37,500		15,300
Credit Risk Derivative Liabilities, at Fair Value	700
Credit Risk Derivative Assets, at Fair Value			(4,300)
Derivative
Derivative [Line Items]
Derivative liabilities	142,600		145,800
Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount			7,700,000
Derivative liabilities	29,500		17,300
Accrued interest and other liabilities | Derivative
Derivative [Line Items]
Derivative, Notional Amount	2,300,000		$ 2,200,000
Accrued interest and other liabilities | Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount	$ 7,200,000