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Debt Securities Held-to-maturity - Weighted average yield and contractual maturities of debt securities HTM (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized cost |  |
Amortized cost | $ 7,929,099 | $ 8,237,004
Book Value |  |
Book Value | 7,541,724 | 7,758,077
Allowance for credit losses |  |
Allowance for credit losses | 5,999 | 5,317
Net of Allowance |  |
Net of Allowance | 7,535,725 | 7,752,760
Gross unrecognized gains |  |
Gross Unrealized Gains | 24,872 | 2,388
Gross unrealized losses |  |
Gross Unrealized Losses | 5,080 | 72,484
Fair Value |  |
Fair value | $ 7,555,517 | $ 7,682,664
Weighted Average Yield |  |
Weighted Average Yield | 1.35% | 1.40%
US Treasury Securities |  |
Amortized cost |  |
Amortized cost - Within 1 year | $ 1,504,543 | $ 599,910
Amortized cost - After 1 to 5 year | 6,362,489 | 7,572,435
Amortized cost | 7,867,032 | 8,172,345
Book Value |  |
Book Value - within 1 year | 1,481,291 | 599,910
Book Value - Within 1 to 5 years | 5,998,366 | 7,093,508
Book Value | 7,479,657 | 7,693,418
Allowance for credit losses |  |
Allowance for credit losses - Within 1 Year | 0 | 0
Allowance for credit losses - After 1 to 5 years | 0 | 0
Allowance for credit losses | 0 | 0
Net of Allowance |  |
Net of Allowance - Within 1 Year | 1,481,291 | 599,910
Net of Allowance - After 1 to 5 Years | 5,998,366 | 7,093,508
Net of Allowance | 7,479,657 | 7,693,418
Gross unrecognized gains |  |
Gross unrealized gains - Within 1 year | 0 | 0
Gross unrealized gains - After 1 to 5 years | 22,074 | 0
Gross Unrealized Gains | 22,074 | 0
Gross unrealized losses |  |
Gross unrealized losses - Within 1 year | 2,667 | 4,498
Gross unrealized losses - After 1 to 5 years | 0 | 65,096
Gross Unrealized Losses | 2,667 | 69,594
Fair Value |  |
Fair Value - within 1 year | 1,478,624 | 595,412
Fair Value - After 1 to 5 years | 6,020,440 | 7,028,412
Fair value | $ 7,499,064 | $ 7,623,824
Weighted Average Yield |  |
Weighted average yield - Within 1 Year | 1.86% | 2.76%
Weighted average yield - After 1 to 5 years | 1.22% | 1.28%
Weighted Average Yield | 1.34% | 1.39%
Obligations of Puerto Rico, States and political subdivisions |  |
Amortized cost |  |
Amortized cost - Within 1 year | $ 2,540 | $ 2,440
Amortized cost - After 1 to 5 year | 14,777 | 16,454
Amortized cost - After 5 to 10 years | 655 | 655
Amortized cost - After 10 years | 36,625 | 37,633
Amortized cost | 54,597 | 57,182
Book Value |  |
Book Value - within 1 year | 2,540 | 2,440
Book Value - Within 1 to 5 years | 14,777 | 16,454
Book Value - After 5 to 10 years | 655 | 655
Book Value - After 10 years | 36,625 | 37,633
Book Value | 54,597 | 57,182
Allowance for credit losses |  |
Allowance for credit losses - Within 1 Year | 7 | 5
Allowance for credit losses - After 1 to 5 years | 60 | 80
Allowance for credit losses - After 5 to 10 years | 21 | 22
Allowance for credit losses - After 10 years | 5,911 | 5,210
Allowance for credit losses | 5,999 | 5,317
Net of Allowance |  |
Net of Allowance - Within 1 Year | 2,533 | 2,435
Net of Allowance - After 1 to 5 Years | 14,717 | 16,374
Net of Allowance - After 5 to 10 Years | 634 | 633
Net of Allowance - After 10 Years | 30,714 | 32,423
Net of Allowance | 48,598 | 51,865
Gross unrecognized gains |  |
Gross unrealized gains - Within 1 year | 6 | 3
Gross unrealized gains - After 1 to 5 years | 31 | 47
Gross unrealized gains - After 5 to 10 years | 21 | 20
Gross unrealized gains - After 10 years | 2,740 | 2,318
Gross Unrealized Gains | 2,798 | 2,388
Gross unrealized losses |  |
Gross unrealized losses - Within 1 year | 0 | 0
Gross unrealized losses - After 1 to 5 years | 98 | 80
Gross unrealized losses - After 5 to 10 years | 0 | 0
Gross unrealized losses - After 10 years | 2,117 | 2,596
Gross Unrealized Losses | 2,215 | 2,676
Fair Value |  |
Fair Value - within 1 year | 2,539 | 2,438
Fair Value - After 1 to 5 years | 14,650 | 16,341
Fair Value - After 5 to 10 years | 655 | 653
Fair Value - After 10 years | 31,337 | 32,145
Fair value | $ 49,181 | $ 51,577
Weighted Average Yield |  |
Weighted average yield - Within 1 Year | 6.41% | 6.39%
Weighted average yield - After 1 to 5 years | 3.40% | 3.69%
Weighted average yield - After 5 to 10 years | 5.81% | 5.81%
Weighted average yield - After 10 years | 1.42% | 1.42%
Weighted Average Yield | 2.24% | 2.34%
Collateralized Mortgage Obligations - Federal agencies |  |
Amortized cost |  |
Amortized cost - After 10 years | $ 1,510 | $ 1,518
Amortized cost | 1,510 | 1,518
Book Value |  |
Book Value - After 10 years | 1,510 | 1,518
Book Value | 1,510 | 1,518
Allowance for credit losses |  |
Allowance for credit losses - After 10 years | 0 | 0
Allowance for credit losses | 0 | 0
Net of Allowance |  |
Net of Allowance - After 10 Years | 1,510 | 1,518
Net of Allowance | 1,510 | 1,518
Gross unrecognized gains |  |
Gross unrealized gains - After 10 years | 0 | 0
Gross Unrealized Gains | 0 | 0
Gross unrealized losses |  |
Gross unrealized losses - After 10 years | 198 | 214
Gross Unrealized Losses | 198 | 214
Fair Value |  |
Fair Value - After 10 years | 1,312 | 1,304
Fair value | $ 1,312 | $ 1,304
Weighted Average Yield |  |
Weighted average yield - After 10 years | 2.87% | 2.87%
Weighted Average Yield | 2.87% | 2.87%
Securities in wholly owned statutory business trusts |  |
Amortized cost |  |
Amortized cost - After 5 to 10 years | $ 5,960 | $ 5,959
Amortized cost | 5,960 | 5,959
Book Value |  |
Book Value - After 5 to 10 years | 5,960 | 5,959
Book Value | 5,960 | 5,959
Allowance for credit losses |  |
Allowance for credit losses - After 5 to 10 years | 0 | 0
Allowance for credit losses | 0 | 0
Net of Allowance |  |
Net of Allowance - After 5 to 10 Years | 5,960 | 5,959
Net of Allowance | 5,960 | 5,959
Gross unrecognized gains |  |
Gross unrealized gains - After 5 to 10 years | 0 | 0
Gross Unrealized Gains | 0 | 0
Gross unrealized losses |  |
Gross unrealized losses - After 5 to 10 years | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value |  |
Fair Value - After 5 to 10 years | 5,960 | 5,959
Fair value | $ 5,960 | $ 5,959
Weighted Average Yield |  |
Weighted average yield - After 5 to 10 years | 6.33% | 6.33%
Weighted Average Yield | 6.33% | 6.33%

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