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v3.23.2

DEBT SECURITIES - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Fair value | $ 5,433,369 |  | $ 5,433,369 |  |  | $ 5,599,520 |  |
Gross Unrealized Losses | 765,955 |  | 765,955 |  |  | 798,466 |  |
Available-for-sale, allowance for credit losses | 433 | $ 676 | 433 | $ 676 | $ 449 | 458 | $ 711 | $ 1,105
Provision For Other Credit Losses Previous Expected Credit Losses | 16 | 35 | 25 | 423 |  |  |  |
Charge-offs |  | 0 |  | (6) |  |  |  |
Allowance for credit losses, Held-to-Maturity securities | 8,401 |  | 8,401 |  |  | 8,286 |  |
Debt Securities, Held-to-maturity | 424,726 |  | 424,726 |  |  | 437,537 |  |
Interest Receivable | $ 70,368 |  | $ 70,368 |  |  | 69,730 |  |
FICO Score, Greater than 700 [Member] | LTV Less than 80 Percent [Member] | Private label [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Loan To Value Coverage Percentage | 80.00% |  | 80.00% |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Debt Instrument Description Of Variable Rate Basis |  |  | 3-month LIBOR |  |  |  |  |
SOFR [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Spread on variable rate |  |  | 0.26161% |  |  |  |  |
Municipal Bonds [Member] | Puerto Rico [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Allowance for credit losses, Held-to-Maturity securities | $ 8,401 | 8,885 | $ 8,401 | 8,885 | 7,646 | 8,286 | 12,324 | 8,571
Provision for credit loss expense | 755 | (3,439) | 115 | 314 |  |  |  |
Debt Securities, Held-to-maturity | 166,124 |  | 166,124 |  |  | 165,710 |  |
Puerto Rico government obligations [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Available-for-sale, allowance for credit losses | 350 | 386 | 350 | 386 | 366 | 375 | 308 | 308
Provision For Other Credit Losses Previous Expected Credit Losses | 16 | (78) | 25 | (78) |  |  |  |
Charge-offs |  | 0 |  | 0 |  |  |  |
Residential Mortgage Backed Securities [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Fair value | 2,759,697 |  | 2,759,697 |  |  | 2,941,458 |  |
Gross Unrealized Losses | 501,867 |  | 501,867 |  |  | 514,499 |  |
Available-for-sale, allowance for credit losses | 84 |  | 84 |  |  | 83 |  |
Allowance for credit losses, Held-to-Maturity securities | 0 |  | 0 |  |  | 0 |  |
Debt Securities, Held-to-maturity | 155,690 |  | 155,690 |  |  | 166,739 |  |
Residential Mortgage Backed Securities [Member] | Private label [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Available-for-sale, allowance for credit losses | 100 |  | 100 |  |  | 100 |  |
Residential Mortgage Backed Securities [Member] | Private label [Member] |  |  |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Available-for-sale, allowance for credit losses | 83 | 290 | 83 | 290 | $ 83 | $ 83 | $ 403 | $ 797
Provision For Other Credit Losses Previous Expected Credit Losses | $ 0 | 113 | $ 0 | 501 |  |  |  |
Charge-offs |  | $ 0 |  | $ (6) |  |  |  |

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