DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details) $ in Thousands	Jun. 30, 2023 USD ($) instrument	Dec. 31, 2022 USD ($)
Designated as Hedging Instrument
Derivative [Line Items]
Notional	$ 250,000
Derivative asset	3,065
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	5,839,486	$ 3,921,032
Total derivatives	$ (11,913)	(16,629)
Interest rate products | Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	3
Notional	$ 250,000
Derivative asset	3,065
Interest rate products | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	147,976	156,414
Derivative liability	(148,099)	(156,414)
Interest rate products | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	2,474,004	1,794,678
Interest rate products | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	2,680,213	1,794,678
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	642	385
Derivative liability	(3)	(7)
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	35,326	24,673
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	868	1,179
Forward sale commitments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	116	75
Derivative liability	(32)	(54)
Forward sale commitments | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	20,250	9,072
Forward sale commitments | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	18,000	20,719
FX forwards | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	83	38
Derivative liability	(50)	(45)
FX forwards | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	3,060	4,177
FX forwards | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	2,400	3,052
Risk participation agreements sold | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative liability	(3)	(2)
Risk participation agreements sold | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	101,644	68,459
Risk participation agreements purchased | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	60	81
Risk participation agreements purchased | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	140,544	87,168
Financial derivatives related to sales of certain Visa Class B shares | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative liability	(15,668)	(17,100)
Financial derivatives related to sales of certain Visa Class B shares | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	$ 113,177	$ 113,177