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Investment Securities - Expected Maturities of Investment Securities Portfolio (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale, Amortized Cost |  |
Within one year | $ 193,329 |
One to five years | 2,585,791 |
Five to ten years | 4,432,629 |
Beyond ten years | 1,268,759 |
Amortized Cost | 8,480,508 | $ 7,684,889
Available-for-sale, Fair Value |  |
Within one year | 192,182 |
One to five years | 2,510,032 |
Five to ten years | 3,775,699 |
Beyond ten years | 980,546 |
Total | $ 7,458,459 | 6,713,055
Available-for-sale, Weighted Average Yield |  |
Within one year | 3.49% |
One to five years | 4.28% |
Five to ten years | 2.60% |
Beyond ten years | 2.66% |
Total | 3.14% |
Held-to-Maturity, Amortized Cost |  |
One to five years | $ 24,574 |
Five to ten years | 1,356,722 |
Beyond ten years | 1,573,585 |
Total held-to-maturity securities | 2,954,881 | 3,013,493
Held-to-Maturity, Fair Value |  |
One to five years | 23,810 |
Five to ten years | 1,149,507 |
Beyond ten years | 1,297,821 |
Total | $ 2,471,138 | $ 2,601,188
Held-to-Maturity, Weighted Average Yield |  |
One to five years | 2.94% |
Five to ten years | 2.57% |
Beyond ten years | 2.74% |
Total | 2.67% |

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