DEBT SECURITIES - ACL on Debt Securities Held-To-Maturity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning Balance	$ 8,286
Ending Balance	2,197	$ 8,286
Municipal Bonds [Member]
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning Balance	8,286
Ending Balance	2,197	8,286
PUERTO RICO | Municipal Bonds [Member]
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning Balance	8,286	8,571	$ 8,845
Provision for credit loss expense	(6,089)	(285)	(274)
Ending Balance	$ 2,197	$ 8,286	$ 8,571