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DEBT SECURITIES - ACL on Debt Securities Held-To-Maturity (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]        
Beginning Balance     $ 8,286  
Ending Balance $ 8,401   8,401  
Municipal Bonds [Member] | PUERTO RICO        
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]        
Beginning Balance 7,646 $ 12,324 8,286 $ 8,571
Provision for credit loss expense 755 (3,439) 115 314
Ending Balance $ 8,401 $ 8,885 $ 8,401 $ 8,885