FAIR VALUE OF FINANCIAL INSTRUMENTS - Individually evaluated loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	$ 1,200
Individually evaluated loans outstanding balance, net of a valuation allowance	10,483,324	$ 9,160,808
Allowance for credit losses	83,507	83,853	$ 41,461	$ 28,441
Credit loss (release) provision	6,910	3,303	$ 26,165
Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans outstanding balance, net of a valuation allowance	2,500	2,500
Allowance for credit losses	1,300	600
Credit loss (release) provision	700
Nonrecurring | Level 3 Inputs
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	1,179	1,900
Carrying Amount
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	10,482,145	9,158,908
Carrying Amount | Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Individually evaluated loans	$ 1,179	$ 1,900