FAIR VALUE OF FINANCIAL INSTRUMENTS - Individually evaluated loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	$ 6,300
Individually evaluated loans outstanding balance, net of a valuation allowance	10,701,685	$ 10,483,324
Allowance for credit losses	71,743	83,507
Provision for credit losses	2,770	5,374	$ 6,212
Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans outstanding balance, net of a valuation allowance	7,300	2,500
Allowance for credit losses	1,000	1,300
Provision for credit losses	371,000	700
Nonrecurring | Level 3 Inputs
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	6,336	1,179
Carrying Amount
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	10,695,349	10,482,145
Carrying Amount | Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	$ 6,336	$ 1,179