DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative [Line Items]
Notional amount	$ 13,844,000,000		$ 13,718,000,000
Additional amount in excess of posted collateral required in case of breached agreements	$ 0		100,000
Interest rate contracts
Derivative [Line Items]
Maximum length of time hedged in interest rate cash flow hedge	2 years 9 months 18 days
Period to reclassification of cash flow hedge gain loss	12 months
Derivative loss to be reclassified within twelve months	$ 31,700,000
Derivative loss to be reclassified within twelve months, net of tax	24,600,000
Derivative gain or losses excluded from assessment of hedge effectiveness	0
Amount of gain (loss) reclassified from AOCI into net income	0	$ 0
Credit risk contracts
Derivative [Line Items]
Notional amount	512,600,000
Maximum exposure under credit risk agreement assuming customer default	100,000		100,000
Credit risk derivatives, purchased at fair value	100,000		100,000
Credit risk derivatives, sold at fair value	$ 100,000		$ 100,000
Credit risk contracts | Minimum
Derivative [Line Items]
Risk participation agreements, term	3 months
Credit risk contracts | Maximum
Derivative [Line Items]
Risk participation agreements, term	18 years