XML 68 R56.htm IDEA: XBRL DOCUMENT v3.22.2.2
DEBT SECURITIES - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Schedule Of Investments [Line Items]                
Fair value $ 5,668,689,000   $ 5,668,689,000     $ 6,453,761,000    
Gross Unrealized Loss 858,729,000   858,729,000     108,537,000    
Available-for-sale, allowance for credit losses 664,000   664,000     1,105,000    
Allowance for credit losses, Held-to-Maturity securities 8,257,000   8,257,000     8,571,000    
Debt Securities, Held-to-maturity $ 445,862,000   $ 445,862,000          
Debt Securities, Held-to-maturity, Threshold Period Past Due 30 days   30 days          
Interest Receivable $ 61,108,000   $ 61,108,000     61,507,000    
Securities Held To Maturity, Purchased 289,900,000              
Past Due [Member]                
Schedule Of Investments [Line Items]                
Debt Securities, Held-to-maturity 0   0     0    
Municipal Bonds [Member] | Puerto Rico [Member]                
Schedule Of Investments [Line Items]                
Available-for-sale, allowance for credit losses 8,300,000   8,300,000     8,600,000    
Allowance for credit losses, Held-to-Maturity securities 8,257,000   8,257,000     8,571,000    
Debt Securities, Held-to-maturity 165,386,000   165,386,000     178,133,000    
Debt Securities Held To Maturity Allowance For Credit Loss Period Increase Decrease     300,000          
Puerto Rico government obligations [Member] | Residential Mortgage Backed Securities [Member]                
Schedule Of Investments [Line Items]                
Fair value 2,200,000   2,200,000          
Gross Unrealized Loss 1,200,000   1,200,000          
Available-for-sale, allowance for credit losses 400,000   400,000          
MBS [Member]                
Schedule Of Investments [Line Items]                
Fair value 3,191,719,000   3,191,719,000     4,044,443,000    
Gross Unrealized Loss 589,639,000   589,639,000     66,477,000    
Available-for-sale, allowance for credit losses 290,000   290,000     797,000    
Allowance for credit losses, Held-to-Maturity securities 0   0          
Debt Securities, Held-to-maturity 280,476,000   280,476,000          
MBS [Member] | Private label [Member]                
Schedule Of Investments [Line Items]                
Fair value 6,200,000   6,200,000          
Gross Unrealized Loss 2,400,000   2,400,000          
Available-for-sale, allowance for credit losses 300,000   300,000     800,000    
Available-for-sale Securities [Member]                
Schedule Of Investments [Line Items]                
Available-for-sale, allowance for credit losses 664,000 $ 1,157,000 664,000 $ 1,157,000 $ 676,000 1,105,000 $ 1,166,000 $ 1,310,000
Provision For Other Credit Losses Previous Expected Credit Losses 12,000 9,000 435,000 136,000        
Charge-offs     6,000 17,000        
Available-for-sale Securities [Member] | Puerto Rico government obligations [Member]                
Schedule Of Investments [Line Items]                
Available-for-sale, allowance for credit losses 374,000 308,000 374,000 308,000 386,000 308,000 308,000 308,000
Provision For Other Credit Losses Previous Expected Credit Losses 12,000 0 (66,000) 0        
Charge-offs     0 0        
Available-for-sale Securities [Member] | MBS [Member] | Private label [Member]                
Schedule Of Investments [Line Items]                
Available-for-sale, allowance for credit losses 290,000 849,000 290,000 849,000 290,000 797,000 858,000 1,002,000
Provision For Other Credit Losses Previous Expected Credit Losses 0 9,000 501,000 136,000        
Charge-offs     $ 6,000 17,000        
Available-for-sale Securities [Member] | MBS [Member] | Private label [Member] | FICO Score, Greater than 700 [Member] | LTV Less than 80 Percent [Member]                
Schedule Of Investments [Line Items]                
Financing Receivable, Credit Quality, Additional Information     The underlying collateral is fixed-rate, single-family residential mortgage loans in the United States with original FICO scores over 700 and moderate loan-to-value ratios (under 80%), as well as moderate delinquency levels.          
Available-for-sale Securities [Member] | MBS [Member] | Private label [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Schedule Of Investments [Line Items]                
Loans Receivable, Description of Variable Rate Basis     The interest rate on these private-label MBS is variable, tied to 3-month LIBOR, and limited to the weighted-average coupon on the underlying collateral.          
Held-to-maturity Securities [Member] | Municipal Bonds [Member] | Puerto Rico [Member]                
Schedule Of Investments [Line Items]                
Allowance for credit losses, Held-to-Maturity securities 8,257,000 8,317,000 $ 8,257,000 8,317,000 $ 8,885,000 $ 8,571,000 $ 10,685,000 $ 8,845,000
Provision for credit loss expense $ (628,000) $ (2,368,000) $ (314,000) $ (528,000)