DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Feb. 28, 2023	Dec. 31, 2022	Dec. 31, 2020
Designated as Hedging Instrument
Derivative [Line Items]
Notional	$ 100,000	$ 100,000
Derivative asset	1,822
Total derivatives				$ 1,300
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	4,328,459		$ 3,921,032
Total derivatives	(13,754)		(16,629)
Interest rate products | Designated as Hedging Instrument
Derivative [Line Items]
Notional	100,000
Derivative asset	1,822
Interest rate products | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	119,336		156,414
Derivative liability	(119,336)		(156,414)
Interest rate products | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	1,916,460		1,794,678
Interest rate products | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	1,919,729		1,794,678
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	752		385
Derivative liability	(1)		(7)
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	38,957		24,673
Interest rate lock commitments with customers | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	859		1,179
Forward sale commitments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	29		75
Derivative liability	(167)		(54)
Forward sale commitments | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	11,257		9,072
Forward sale commitments | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	23,850		20,719
FX forwards | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	146		38
Derivative liability	(118)		(45)
FX forwards | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	3,653		4,177
FX forwards | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	3,000		3,052
Risk participation agreements sold | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative liability	(4)		(2)
Risk participation agreements sold | Derivatives not designated as hedging instruments | Other liabilities
Derivative [Line Items]
Notional	106,926		68,459
Risk participation agreements purchased | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative asset	78		81
Risk participation agreements purchased | Derivatives not designated as hedging instruments | Other assets
Derivative [Line Items]
Notional	90,591		87,168
Financial derivatives related to sales of certain Visa Class B shares | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative liability	(16,291)		(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