DERIVATIVES - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) entity	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) entity	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) entity
Derivative [Line Items]
Derivative, Notional Amount	$ 20,027,711		$ 20,027,711			$ 19,828,103
Number of counterparties | entity	6		6			6
Derivative liabilities	$ 370,576		$ 370,576			$ 357,698
Derivative Liability, Fair Value of Collateral, net of restricted cash	195,100		195,100			132,200
Derivative Liability, Fair Value of Collateral	219,200		219,200			157,200
Restricted Cash	24,100		24,100			25,000
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	(1,824)		(1,824)		$ (331)	$ 0
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	300		300
Client derivative fees	$ 1,612	$ 1,447	$ 4,444	$ 3,619
Foreign Exchange
Derivative [Line Items]
Number of counterparties | entity	5		5			5
Credit Risk Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 200,700		$ 200,700			$ 246,800
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	32,300		32,300			12,000
Other Credit Derivatives [Member]
Derivative [Line Items]
Derivative, Notional Amount	31,300		31,300			15,300
Credit Risk Derivative Liabilities, at Fair Value	1,200		1,200
Credit Risk Derivative Assets, at Fair Value						(4,300)
Mortgage Banking
Derivative [Line Items]
Client derivative fees	400	$ 300	1,200	$ 4,000
Other Contract-Mortgage
Derivative [Line Items]
Derivative, Notional Amount	117,400		117,400			132,500
Derivative
Derivative [Line Items]
Derivative liabilities	167,700		167,700			145,800
Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount						7,700,000
Derivative liabilities	47,100		47,100			17,300
Accrued interest and other liabilities | Derivative
Derivative [Line Items]
Derivative, Notional Amount	2,200,000		2,200,000			$ 2,200,000
Accrued interest and other liabilities | Derivative | Foreign Exchange
Derivative [Line Items]
Derivative, Notional Amount	$ 7,500,000		$ 7,500,000