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DEBT SECURITIES - Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost | $ 6,669,190 | $ 6,534,503
Gross Unrealized Gain | 2,738 | 28,900
Gross Unrealized Loss | 590,132 | 108,537
Allowance for Credit Losses | 676 | 1,105
Fair value | $ 6,081,120 | $ 6,453,761
Weighted-average yield | 1.17% | 1.03%
U.S. Treasury securities [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost After 1 to 5 years | $ 149,262 | $ 149,660
Gross Unrealized Gains After 1 to 5 years | 0 | 59
Gross Unrealized Losses After 1 to 5 years | 7,915 | 1,233
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 141,347 | $ 148,486
Weighted-average yield After 1 to 5 years | 0.68% | 0.68%
U.S. government-sponsored agencies obigations [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost After 1 to 5 years | $ 2,352,787 | $ 1,877,181
Gross Unrealized Gains After 1 to 5 years | 24 | 240
Gross Unrealized Losses After 1 to 5 years | 152,520 | 29,555
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 2,200,291 | $ 1,847,866
Weighted-average yield After 1 to 5 years | 0.79% | 0.60%
Amortized cost After 5 to 10 years | $ 227,548 | $ 403,785
Gross Unrealized Gains After 5 to 10 years | 65 | 175
Gross Unrealized Losses After 5 to 10 years | 24,168 | 10,856
Allowance for Credit Losses After 5 to 10 years | 0 | 0
Fair value After 5 to 10 years | $ 203,445 | $ 393,104
Weighted-average yield After 5 to 10 years | 0.96% | 0.90%
Amortized cost After 10 years | $ 14,184 | $ 15,788
Gross Unrealized Gains After 10 years | 217 | 224
Gross Unrealized Losses After 10 years | 0 | 0
Allowance for Credit Losses After 10 years | 0 | 0
Fair value After 10 years | $ 14,401 | $ 16,012
Weighted-average yield After 10 years | 2.04% | 0.63%
Puerto Rico government obligations [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost After 10 years | $ 3,441 | $ 3,574
Gross Unrealized Gains After 10 years | 0 | 0
Gross Unrealized Losses After 10 years | 246 | 416
Allowance for Credit Losses After 10 years | 386 | 308
Fair value After 10 years | $ 2,809 | $ 2,850
Weighted-average yield After 10 years | 0.00% | 0.00%
United States And Puerto Rico Government Obligations [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost | $ 2,747,222 | $ 2,449,988
Gross Unrealized Gain | 306 | 698
Gross Unrealized Loss | 184,849 | 42,060
Allowance for Credit Losses | 386 | 308
Fair value | $ 2,562,293 | $ 2,408,318
Weighted-average yield | 0.81% | 0.67%
MBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost | $ 3,920,968 | $ 4,083,515
Gross Unrealized Gain | 2,432 | 28,202
Gross Unrealized Loss | 405,283 | 66,477
Allowance for Credit Losses | 290 | 797
Fair value | $ 3,517,827 | $ 4,044,443
Weighted-average yield | 1.43% | 1.26%
MBS [Member] | FHLMC [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost After 1 to 5 years | $ 5,347 | $ 2,811
Gross Unrealized Gains After 1 to 5 years | 1 | 119
Gross Unrealized Losses After 1 to 5 years | 76 | 0
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 5,272 | $ 2,930
Weighted-average yield After 1 to 5 years | 2.33% | 2.65%
Amortized cost After 5 to 10 years | $ 203,549 | $ 193,234
Gross Unrealized Gains After 5 to 10 years | 52 | 2,419
Gross Unrealized Losses After 5 to 10 years | 9,852 | 1,122
Allowance for Credit Losses After 5 to 10 years | 0 | 0
Fair value After 5 to 10 years | $ 193,749 | $ 194,531
Weighted-average yield After 5 to 10 years | 1.44% | 1.29%
Amortized cost After 10 years | $ 1,175,621 | $ 1,240,964
Gross Unrealized Gains After 10 years | 9 | 3,748
Gross Unrealized Losses After 10 years | 144,500 | 23,503
Allowance for Credit Losses After 10 years | 0 | 0
Fair value After 10 years | $ 1,031,130 | $ 1,221,209
Weighted-average yield After 10 years | 1.33% | 1.18%
Amortized cost | $ 1,384,517 | $ 1,437,009
Gross Unrealized Gain | 62 | 6,286
Gross Unrealized Loss | 154,428 | 24,625
Allowance for Credit Losses | 0 | 0
Fair value | $ 1,230,151 | $ 1,418,670
Weighted-average yield | 1.35% | 1.20%
MBS [Member] | GNMA [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost Due within one year | $ 6 | $ 2
Gross Unrealized Gains Due within one year | 0 | 0
Gross Unrealized Losses Due within one year | 0 | 0
Allowance for Credit Losses within one year | 0 | 0
Fair value Due within one year | $ 6 | $ 2
Weighted-average yield Due within one year | 1.95% | 1.32%
Amortized cost After 1 to 5 years | $ 20,088 | $ 16,714
Gross Unrealized Gains After 1 to 5 years | 130 | 572
Gross Unrealized Losses After 1 to 5 years | 329 | 0
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 19,889 | $ 17,286
Weighted-average yield After 1 to 5 years | 2.04% | 2.90%
Amortized cost After 5 to 10 years | $ 42,090 | $ 27,271
Gross Unrealized Gains After 5 to 10 years | 0 | 80
Gross Unrealized Losses After 5 to 10 years | 2,369 | 139
Allowance for Credit Losses After 5 to 10 years | 0 | 0
Fair value After 5 to 10 years | $ 39,721 | $ 27,212
Weighted-average yield After 5 to 10 years | 1.07% | 0.51%
Amortized cost After 10 years | $ 261,681 | $ 338,927
Gross Unrealized Gains After 10 years | 1,434 | 7,091
Gross Unrealized Losses After 10 years | 18,926 | 2,174
Allowance for Credit Losses After 10 years | 0 | 0
Fair value After 10 years | $ 244,189 | $ 343,844
Weighted-average yield After 10 years | 2.01% | 1.45%
Amortized cost | $ 323,865 | $ 382,914
Gross Unrealized Gain | 1,564 | 7,743
Gross Unrealized Loss | 21,624 | 2,313
Allowance for Credit Losses | 0 | 0
Fair value | $ 303,805 | $ 388,344
Weighted-average yield | 1.89% | 1.45%
MBS [Member] | FNMA [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost Due within one year | $ 2,099 | $ 4,975
Gross Unrealized Gains Due within one year | 0 | 21
Gross Unrealized Losses Due within one year | 2 | 0
Allowance for Credit Losses within one year | 0 | 0
Fair value Due within one year | $ 2,097 | $ 4,996
Weighted-average yield Due within one year | 2.41% | 2.03%
Amortized cost After 1 to 5 years | $ 15,905 | $ 21,337
Gross Unrealized Gains After 1 to 5 years | 161 | 424
Gross Unrealized Losses After 1 to 5 years | 44 | 0
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 16,022 | $ 21,761
Weighted-average yield After 1 to 5 years | 2.87% | 2.87%
Amortized cost After 5 to 10 years | $ 379,705 | $ 298,771
Gross Unrealized Gains After 5 to 10 years | 51 | 4,387
Gross Unrealized Losses After 5 to 10 years | 19,210 | 1,917
Allowance for Credit Losses After 5 to 10 years | 0 | 0
Fair value After 5 to 10 years | $ 360,546 | $ 301,241
Weighted-average yield After 5 to 10 years | 1.51% | 1.41%
Amortized cost After 10 years | $ 1,325,053 | $ 1,389,381
Gross Unrealized Gains After 10 years | 591 | 8,953
Gross Unrealized Losses After 10 years | 145,356 | 21,747
Allowance for Credit Losses After 10 years | 0 | 0
Fair value After 10 years | $ 1,180,288 | $ 1,376,587
Weighted-average yield After 10 years | 1.38% | 1.21%
Amortized cost | $ 1,722,762 | $ 1,714,464
Gross Unrealized Gain | 803 | 13,785
Gross Unrealized Loss | 164,612 | 23,664
Allowance for Credit Losses | 0 | 0
Fair value | $ 1,558,953 | $ 1,704,585
Weighted-average yield | 1.42% | 1.27%
MBS [Member] | Collateralized mortgage obligations guaranteed by FHLMC, FNMA and GNMA [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost Due within one year | $ 68 |
Gross Unrealized Gains Due within one year | 0 |
Gross Unrealized Losses Due within one year | 0 |
Allowance for Credit Losses within one year | 0 |
Fair value Due within one year | $ 68 |
Weighted-average yield Due within one year | 2.54% |
Amortized cost After 1 to 5 years | $ 33,228 | $ 24,007
Gross Unrealized Gains After 1 to 5 years | 3 | 1
Gross Unrealized Losses After 1 to 5 years | 3,253 | 778
Allowance for Credit Losses After 1 to 5 years | 0 | 0
Fair value After 1 to 5 years | $ 29,978 | $ 23,230
Weighted-average yield After 1 to 5 years | 1.70% | 1.31%
Amortized cost After 5 to 10 years |  | $ 14,316
Gross Unrealized Gains After 5 to 10 years |  | 97
Gross Unrealized Losses After 5 to 10 years |  | 0
Allowance for Credit Losses After 5 to 10 years |  | 0
Fair value After 5 to 10 years |  | $ 14,413
Weighted-average yield After 5 to 10 years |  | 0.76%
Amortized cost After 10 years | $ 447,341 | $ 500,811
Gross Unrealized Gains After 10 years | 0 | 290
Gross Unrealized Losses After 10 years | 58,840 | 13,134
Allowance for Credit Losses After 10 years | 0 | 0
Fair value After 10 years | $ 388,501 | $ 487,967
Weighted-average yield After 10 years | 1.27% | 1.23%
Amortized cost | $ 480,637 | $ 539,134
Gross Unrealized Gain | 3 | 388
Gross Unrealized Loss | 62,093 | 13,912
Allowance for Credit Losses | 0 | 0
Fair value | $ 418,547 | $ 525,610
Weighted-average yield | 1.30% | 1.22%
MBS [Member] | Private label [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost After 10 years | $ 9,187 | $ 9,994
Gross Unrealized Gains After 10 years | 0 | 0
Gross Unrealized Losses After 10 years | 2,526 | 1,963
Allowance for Credit Losses After 10 years | 290 | 797
Fair value After 10 years | $ 6,371 | $ 7,234
Weighted-average yield After 10 years | 4.42% | 2.21%
Gross Unrealized Loss | $ 2,800 |
Allowance for Credit Losses | 300 | $ 800
Fair value | $ 6,400 |
Weighted-average yield | 4.42% |
Other Debt Obligations [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized cost Due within one year | $ 1,000 | 500
Gross Unrealized Gains Due within one year | 0 | 0
Gross Unrealized Losses Due within one year | 0 | 0
Allowance for Credit Losses within one year | 0 | 0
Fair value Due within one year | $ 1,000 | $ 500
Weighted-average yield Due within one year | 0.78% | 0.72%
Amortized cost After 1 to 5 years |  | $ 500
Gross Unrealized Gains After 1 to 5 years |  | 0
Gross Unrealized Losses After 1 to 5 years |  | 0
Allowance for Credit Losses After 1 to 5 years |  | 0
Fair value After 1 to 5 years |  | $ 500
Weighted-average yield After 1 to 5 years |  | 0.84%
Amortized cost |  | $ 1,000
Gross Unrealized Gain |  | 0
Gross Unrealized Loss |  | 0
Allowance for Credit Losses |  | 0
Fair value |  | $ 1,000
Weighted-average yield |  | 0.78%

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. This represents single maturity date and allocated without single maturity date, maturing in sixth fiscal year through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References No definition available. + Details
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