CREDIT QUALITY ASSESSMENT - Allowance for Credit Loss Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	$ 109,145	$ 165,367	$ 56,132
Initial allowance on Revere PCD loans	0	0	18,628
Provision/ (credit) for credit losses - loans	26,680	(45,556)	85,669
Loans charge-offs	(1,105)	(12,313)	(1,819)
Loans recoveries	1,522	1,647	1,012
Net (charge-offs)/ recoveries	417	(10,666)	(807)
Balance at period end	136,242	109,145	165,367
Revision of Prior Period, Reclassification, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	0	0	2,762
Balance at period end		0	0
Revision of Prior Period, Accounting Standards Update, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	$ 0	0	2,983
Balance at period end		$ 0	$ 0