DERIVATIVE FINANCIAL INSTRUMENTS - Summary of Fair Values of Derivative Instruments (Details) $ in Thousands	Dec. 31, 2023 USD ($) instrument	Dec. 31, 2022 USD ($)
Derivatives, Fair Value [Line Items]
Notional	$ 5,997,253	$ 3,921,032
Total derivatives	2,005	(16,629)
Derivatives not designated as hedging instruments | Interest rate products
Derivatives, Fair Value [Line Items]
Derivative asset	136,924	156,414
Derivative liability	(136,924)	(156,414)
Derivatives not designated as hedging instruments | Interest rate products | Other assets
Derivatives, Fair Value [Line Items]
Notional	2,428,306	1,794,678
Derivatives not designated as hedging instruments | Interest rate products | Other liabilities
Derivatives, Fair Value [Line Items]
Notional	2,383,443	1,794,678
Derivatives not designated as hedging instruments | Interest rate lock commitments with customers
Derivatives, Fair Value [Line Items]
Derivative asset	637	385
Derivative liability		(7)
Derivatives not designated as hedging instruments | Interest rate lock commitments with customers | Other assets
Derivatives, Fair Value [Line Items]
Notional	34,651	24,673
Derivatives not designated as hedging instruments | Interest rate lock commitments with customers | Other liabilities
Derivatives, Fair Value [Line Items]
Notional		1,179
Derivatives not designated as hedging instruments | Forward sale commitments
Derivatives, Fair Value [Line Items]
Derivative asset	1	75
Derivative liability	(283)	(54)
Derivatives not designated as hedging instruments | Forward sale commitments | Other assets
Derivatives, Fair Value [Line Items]
Notional	1,000	9,072
Derivatives not designated as hedging instruments | Forward sale commitments | Other liabilities
Derivatives, Fair Value [Line Items]
Notional	37,348	20,719
Derivatives not designated as hedging instruments | FX forwards
Derivatives, Fair Value [Line Items]
Derivative asset	429	38
Derivative liability	(409)	(45)
Derivatives not designated as hedging instruments | FX forwards | Other assets
Derivatives, Fair Value [Line Items]
Notional	15,812	4,177
Derivatives not designated as hedging instruments | FX forwards | Other liabilities
Derivatives, Fair Value [Line Items]
Notional	13,064	3,052
Derivatives not designated as hedging instruments | Risk participation agreements sold
Derivatives, Fair Value [Line Items]
Derivative liability	(3)	(2)
Derivatives not designated as hedging instruments | Risk participation agreements sold | Other liabilities
Derivatives, Fair Value [Line Items]
Notional	103,648	68,459
Derivatives not designated as hedging instruments | Risk participation agreements purchased
Derivatives, Fair Value [Line Items]
Derivative asset	78	81
Derivatives not designated as hedging instruments | Risk participation agreements purchased | Other assets
Derivatives, Fair Value [Line Items]
Notional	116,804	87,168
Derivatives not designated as hedging instruments | Financial derivative related to sales of certain Visa Class B shares
Derivatives, Fair Value [Line Items]
Derivative liability	(14,023)	(17,100)
Derivatives not designated as hedging instruments | Financial derivative related to sales of certain Visa Class B shares | Other liabilities
Derivatives, Fair Value [Line Items]
Notional	113,177	$ 113,177
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional	750,000
Derivative asset	$ 15,578
Derivatives Designated as Hedging Instruments | Interest rate products
Derivatives, Fair Value [Line Items]
Number of derivative instruments | instrument	9
Notional	$ 750,000
Derivative asset	$ 15,578