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DEBT SECURITIES - Investments Securities Held to Maturity (Securities in continuous unrealized loss position) (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | $ 255,209 | $ 260,106
HTM Unrealized Losses Less than 12 months | 10,386 | 11,721
HTM Fair Value 12 months or more | 108,266 | 98,797
HTM Unrealized Losses 12 months or more | 3,418 | 2,769
HTM Fair Value | 363,475 | 358,903
HTM Unrealized Losses | 13,804 | 14,490
Commercial MBS [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 99,119 | 100,523
HTM Unrealized Losses Less than 12 months | 4,889 | 4,565
HTM Fair Value 12 months or more | 0 | 0
HTM Unrealized Losses 12 months or more | 0 | 0
HTM Fair Value | 99,119 | 100,523
HTM Unrealized Losses | 4,889 | 4,565
FHLMC [Member] | Residential MBS [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 37,947 | 39,171
HTM Unrealized Losses Less than 12 months | 1,358 | 1,634
HTM Fair Value 12 months or more | 0 | 0
HTM Unrealized Losses 12 months or more | 0 | 0
HTM Fair Value | 37,947 | 39,171
HTM Unrealized Losses | 1,358 | 1,634
GNMA [Member] | Residential MBS [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 17,707 | 18,188
HTM Unrealized Losses Less than 12 months | 795 | 943
HTM Fair Value 12 months or more | 0 | 0
HTM Unrealized Losses 12 months or more | 0 | 0
HTM Fair Value | 17,707 | 18,188
HTM Unrealized Losses | 795 | 943
FNMA [Member] | Residential MBS [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 69,068 | 69,192
HTM Unrealized Losses Less than 12 months | 2,190 | 3,155
HTM Fair Value 12 months or more | 0 | 0
HTM Unrealized Losses 12 months or more | 0 | 0
HTM Fair Value | 69,068 | 69,192
HTM Unrealized Losses | 2,190 | 3,155
Collateralized Mortgage Obligations [Member] | Residential MBS [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 31,368 | 33,032
HTM Unrealized Losses Less than 12 months | 1,154 | 1,424
HTM Fair Value 12 months or more | 0 | 0
HTM Unrealized Losses 12 months or more | 0 | 0
HTM Fair Value | 31,368 | 33,032
HTM Unrealized Losses | 1,154 | 1,424
Puerto Rico [Member] | Municipal Bonds [Member] |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
HTM Fair Value Less than 12 months | 0 | 0
HTM Unrealized Losses Less than 12 months | 0 | 0
HTM Fair Value 12 months or more | 108,266 | 98,797
HTM Unrealized Losses 12 months or more | 3,418 | 2,769
HTM Fair Value | 108,266 | 98,797
HTM Unrealized Losses | $ 3,418 | $ 2,769

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