DEBT SECURITIES - Investment Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 437,537	$ 178,133
Held to Maturity Gross Unrecognized gains	4,068	2,086
Held to Maturity Gross Unrecognized losses	14,490	13,072
Held to Maturity Fair value	427,115	167,147
Allowance for credit losses, Held-to-Maturity securities	$ 8,286	$ 8,571
Held to Maturity Weighted-average yield	4.71%	4.04%
Held to maturity accrued interest receivable excluded from estimate of credit losses	$ 5,500	$ 3,400
Mortgage Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	271,827
Held to Maturity Gross Unrecognized gains	0
Held to Maturity Gross Unrecognized losses	11,721
Held to Maturity Fair value	260,106
Allowance for credit losses, Held-to-Maturity securities	$ 0
Held to Maturity Weighted-average yield	3.55%
Municipal Bonds [Member] | Puerto Rico [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Matury Amortized Due Withing One Year	$ 1,202	2,995
Held to Maturity Gross Unrecognized gain Due Within One Year	0	5
Held to Maturity Gross Unrecognized losses Due Within One Year	15	0
Held to Maturity Fair value Due Within One Year	1,187	3,000
Allowance for credit losses Due within one year	$ 2	$ 70
Held to Maturity Weighted-average yield Due withing One Year	5.20%	5.39%
Held to Maturity Amortized Cost After 1 to 5 years	$ 42,530	$ 14,785
Held to Maturity Gross Unrecognized gains After 1 to 5 years	886	526
Held to Maturity Gross Unrecognized losses After 1 to 5 years	1,076	156
Held to Maturity Fair value After 1 to 5 years	42,340	15,155
Allowance for credit losses After 1 to 5 years	$ 656	$ 347
Held to Maturity Weighted-average yield After 1 to 5 years	6.34%	2.35%
Held to Maturity Amortized Cost After 5 to 10 years	$ 55,956	$ 90,584
Held to Maturity Gross Unrecognized gains After 5 to 10 yearss	3,182	1,555
Held to Maturity Gross Unrecognized losses After 5 to 10 years	360	3,139
Held to Maturity Fair value After 5 to 10 years	58,778	89,000
Allowance for credit losses After 5 to 10 years	$ 3,243	$ 3,258
Held to Maturity Weighted-average yield After 5 to 10 years	6.29%	4.25%
Held to Maturity Amortized Cost After 10 years		$ 69,769
Held to Maturity Gross Unrecognized gains After 10 years		0
Held to Maturity Gross Unrecognized losses After 10 years		9,777
Held to Maturity Fair value After 10 years		59,992
Allowance for credit losses After 10 years		$ 4,896
Held to Maturity Weighted-average yield After 10 years	7.10%	4.06%
Held To Maturity Securities Amortized	$ 165,710
Held to Maturity Gross Unrecognized gains	4,068
Held to Maturity Gross Unrecognized losses	2,769
Held to Maturity Fair value	167,009
Allowance for credit losses, Held-to-Maturity securities	$ 8,286	$ 8,571	$ 8,845	$ 0
Held to Maturity Weighted-average yield	6.62%
FHLMC [Member] | Mortgage Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 5 to 10 years	$ 21,443
Held to Maturity Gross Unrecognized gains After 5 to 10 yearss	0
Held to Maturity Gross Unrecognized losses After 5 to 10 years	746
Held to Maturity Fair value After 5 to 10 years	20,697
Allowance for credit losses After 5 to 10 years	$ 0
Held to Maturity Weighted-average yield After 5 to 10 years	3.03%
Held to Maturity Amortized Cost After 10 years	$ 19,362
Held to Maturity Gross Unrecognized gains After 10 years	0
Held to Maturity Gross Unrecognized losses After 10 years	888
Held to Maturity Fair value After 10 years	18,474
Allowance for credit losses After 10 years	$ 0
Held to Maturity Weighted-average yield After 10 years	4.21%
Held To Maturity Securities Amortized	$ 40,805
Held to Maturity Gross Unrecognized gains	0
Held to Maturity Gross Unrecognized losses	1,634
Held to Maturity Fair value	39,171
Allowance for credit losses, Held-to-Maturity securities	$ 0
Held to Maturity Weighted-average yield	3.59%
GNMA [Member] | Mortgage Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 19,131
Held to Maturity Gross Unrecognized gains After 10 years	0
Held to Maturity Gross Unrecognized losses After 10 years	943
Held to Maturity Fair value After 10 years	18,188
Allowance for credit losses After 10 years	$ 0
Held to Maturity Weighted-average yield After 10 years	3.35%
FNMA [Member] | Mortgage Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 1 to 5 years	$ 9,621
Held to Maturity Gross Unrecognized gains After 1 to 5 years	0
Held to Maturity Gross Unrecognized losses After 1 to 5 years	396
Held to Maturity Fair value After 1 to 5 years	9,225
Allowance for credit losses After 1 to 5 years	$ 0
Held to Maturity Weighted-average yield After 1 to 5 years	3.48%
Held to Maturity Amortized Cost After 10 years	$ 72,347
Held to Maturity Gross Unrecognized gains After 10 years	0
Held to Maturity Gross Unrecognized losses After 10 years	3,155
Held to Maturity Fair value After 10 years	69,192
Allowance for credit losses After 10 years	$ 0
Held to Maturity Weighted-average yield After 10 years	4.14%
Held To Maturity Securities Amortized	$ 81,968
Held to Maturity Gross Unrecognized gains	0
Held to Maturity Gross Unrecognized losses	3,551
Held to Maturity Fair value	78,417
Allowance for credit losses, Held-to-Maturity securities	$ 0
Held to Maturity Weighted-average yield	4.06%
Collateralized Mortgage Obligations [Member] | Mortgage Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 129,923
Held to Maturity Gross Unrecognized gains After 10 years	0
Held to Maturity Gross Unrecognized losses After 10 years	5,593
Held to Maturity Fair value After 10 years	124,330
Allowance for credit losses After 10 years	$ 0
Held to Maturity Weighted-average yield After 10 years	3.24%