DERIVATIVES - Additional Information (Details) $ in Thousands	Mar. 31, 2022 USD ($) entity	Dec. 31, 2021 USD ($) entity
Derivative [Line Items]
Number of counterparties | entity	6	6
Derivative liabilities	$ 219,745	$ 212,977
Derivative, Notional Amount	$ 17,479,999	$ 17,683,691
Foreign Exchange
Derivative [Line Items]
Number of counterparties | entity	4	4
Credit Risk Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 370,000	$ 362,800
Credit Risk Derivative Liabilities, at Fair Value		100
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	53,100	45,000
Other Credit Derivatives [Member]
Derivative [Line Items]
Derivative, Notional Amount	62,500	62,500
Credit Risk Derivative Liabilities, at Fair Value	900
Credit Risk Derivative Assets, at Fair Value		(3,300)
Accrued interest and other liabilities | Derivative
Derivative [Line Items]
Derivative liabilities	40,200	74,200
Derivative, Notional Amount	2,300,000	2,400,000
Accrued interest and other liabilities | Derivative | Foreign Exchange
Derivative [Line Items]
Derivative liabilities	25,200	15,200
Derivative, Notional Amount	$ 6,400,000	$ 6,400,000