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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
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

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

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