DEBT SECURITIES - Held-to-Maturity Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 317,786	$ 354,178
Held to Maturity Gross Unrecognized gains	3,815	4,811
Held to Maturity Gross Unrecognized losses	13,561	12,857
Held to Maturity Fair value	308,040	346,132
Allowance for credit losses, Held-to-Maturity securities	$ 802	$ 2,197
Held to Maturity Weighted-average yield	4.83%	4.84%
Interest receivable	$ 71,881	$ 77,716
Held-to-Maturity Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Interest receivable	4,100	4,800
Municipal Bonds [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Due Withing One Year	2,214	3,165
Held to Maturity Gross Unrecognized gain Due Within One Year	134	8
Held to Maturity Gross Unrecognized losses Due Within One Year	6	38
Held to Maturity Fair value Due Within One Year	2,342	3,135
Allowance for credit losses Due within one year	$ 6	$ 50
Held to Maturity Weighted-average yield Due withing One Year	5.07%	9.30%
Held to Maturity Amortized Cost After 1 to 5 years	$ 61,289	$ 51,230
Held to Maturity Gross Unrecognized gains After 1 to 5 years	2,724	994
Held to Maturity Gross Unrecognized losses After 1 to 5 years	438	710
Held to Maturity Fair value After 1 to 5 years	63,575	51,514
Allowance for credit losses After 1 to 5 years	$ 433	$ 1,266
Held to Maturity Weighted-average yield After 1 to 5 years	7.33%	7.78%
Held to Maturity Amortized Cost After 5 to 10 years	$ 13,184	$ 36,050
Held to Maturity Gross Unrecognized gains After 5 to 10 years	811	3,540
Held to Maturity Gross Unrecognized losses After 5 to 10 years	205	210
Held to Maturity Fair value After 5 to 10 years	13,790	39,380
Allowance for credit losses After 5 to 10 years	$ 127	$ 604
Held to Maturity Weighted-average yield After 5 to 10 years	5.79%	7.13%
Held to Maturity Amortized Cost After 10 years	$ 15,755	$ 16,595
Held to Maturity Gross Unrecognized gains After 10 years	146	269
Held to Maturity Gross Unrecognized losses After 10 years	0	0
Held to Maturity Fair value After 10 years	15,901	16,864
Allowance for credit losses After 10 years	$ 236	$ 277
Held to Maturity Weighted-average yield After 10 years	8.07%	8.87%
Held To Maturity Securities Amortized	$ 92,442	$ 107,040
Held to Maturity Gross Unrecognized gains	3,815	4,811
Held to Maturity Gross Unrecognized losses	649	958
Held to Maturity Fair value	95,608	110,893
Allowance for credit losses, Held-to-Maturity securities	$ 802	$ 2,197
Held to Maturity Weighted-average yield	7.18%	7.78%
Municipal Bonds [Member] | Puerto Rico [Member]
Schedule Of Held To Maturity Securities [Line Items]
Allowance for credit losses, Held-to-Maturity securities	$ 802	$ 2,197	$ 8,286	$ 8,571
Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	129,319	146,468
Held to Maturity Gross Unrecognized gains	0	0
Held to Maturity Gross Unrecognized losses	7,444	5,819
Held to Maturity Fair value	121,875	140,649
Allowance for credit losses, Held-to-Maturity securities	$ 0	$ 0
Held to Maturity Weighted-average yield	3.86%	3.84%
Residential MBS [Member] | FHLMC [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 5 to 10 years	$ 12,112	$ 16,469
Held to Maturity Gross Unrecognized gains After 5 to 10 years	0	0
Held to Maturity Gross Unrecognized losses After 5 to 10 years	353	556
Held to Maturity Fair value After 5 to 10 years	11,759	15,913
Allowance for credit losses After 5 to 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 5 to 10 years	3.03%	3.03%
Held to Maturity Amortized Cost After 10 years	$ 16,936	$ 18,324
Held to Maturity Gross Unrecognized gains After 10 years	0	0
Held to Maturity Gross Unrecognized losses After 10 years	1,142	714
Held to Maturity Fair value After 10 years	15,794	17,610
Allowance for credit losses After 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 10 years	4.30%	4.32%
Held To Maturity Securities Amortized	$ 29,048	$ 34,793
Held to Maturity Gross Unrecognized gains	0	0
Held to Maturity Gross Unrecognized losses	1,495	1,270
Held to Maturity Fair value	27,553	33,523
Allowance for credit losses, Held-to-Maturity securities	$ 0	$ 0
Held to Maturity Weighted-average yield	3.77%	3.71%
Residential MBS [Member] | GNMA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 13,472	$ 16,265
Held to Maturity Gross Unrecognized gains After 10 years	0	0
Held to Maturity Gross Unrecognized losses After 10 years	842	789
Held to Maturity Fair value After 10 years	12,630	15,476
Allowance for credit losses After 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 10 years	3.29%	3.32%
Residential MBS [Member] | FNMA [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 61,233	$ 67,271
Held to Maturity Gross Unrecognized gains After 10 years	0	0
Held to Maturity Gross Unrecognized losses After 10 years	3,786	2,486
Held to Maturity Fair value After 10 years	57,447	64,785
Allowance for credit losses After 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 10 years	4.19%	4.18%
Residential MBS [Member] | CMOs issued or guaranteed by the FHLMC, FNMA, and GNMA: [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 25,566	$ 28,139
Held to Maturity Gross Unrecognized gains After 10 years	0	0
Held to Maturity Gross Unrecognized losses After 10 years	1,321	1,274
Held to Maturity Fair value After 10 years	24,245	26,865
Allowance for credit losses After 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 10 years	3.49%	3.49%
Commercial MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 1 to 5 years	$ 9,258	$ 9,444
Held to Maturity Gross Unrecognized gains After 1 to 5 years	0	0
Held to Maturity Gross Unrecognized losses After 1 to 5 years	151	297
Held to Maturity Fair value After 1 to 5 years	9,107	9,147
Allowance for credit losses After 1 to 5 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 1 to 5 years	3.48%	3.48%
Held to Maturity Amortized Cost After 10 years	$ 86,767	$ 91,226
Held to Maturity Gross Unrecognized gains After 10 years	0	0
Held to Maturity Gross Unrecognized losses After 10 years	5,317	5,783
Held to Maturity Fair value After 10 years	81,450	85,443
Allowance for credit losses After 10 years	$ 0	$ 0
Held to Maturity Weighted-average yield After 10 years	3.92%	3.15%
Held To Maturity Securities Amortized	$ 96,025	$ 100,670
Held to Maturity Gross Unrecognized gains	0	0
Held to Maturity Gross Unrecognized losses	5,468	6,080
Held to Maturity Fair value	90,557	94,590
Allowance for credit losses, Held-to-Maturity securities	$ 0	$ 0
Held to Maturity Weighted-average yield	3.88%	3.18%
MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 225,344	$ 247,138
Held to Maturity Gross Unrecognized gains	0	0
Held to Maturity Gross Unrecognized losses	12,912	11,899
Held to Maturity Fair value	212,432	235,239
Allowance for credit losses, Held-to-Maturity securities	$ 0	$ 0
Held to Maturity Weighted-average yield	3.87%	3.57%
Uninsured Portion Of Government Deposits [Member] | Asset Pledged as Collateral [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 198,600	$ 126,600
Held to Maturity Fair value	$ 192,400	$ 125,900