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SECURITIES (Securities Debt Maturities) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized Cost |  |
Maturing in one year or less | $ 0 |
Maturing after one year through five years | 162,723 |
Maturing after five years through ten years | 370,064 |
Maturing after ten years through twenty years | 2,197,193 |
Debt Securities, Available-for-sale, Amortized Cost | 2,729,980 | $ 3,218,777
Fair Value |  |
Maturing in one year or less | 0 |
Maturing after one year through five years | 152,661 |
Maturing after five years through ten years | 327,355 |
Maturing after ten years through twenty years | 1,893,767 |
Securities—available-for-sale | 2,373,783 | 2,789,031
Amortized Cost |  |
Maturing within one year | 6,685 |
Maturing after one year through five years | 18,546 |
Maturing after five years through 10 years | 22,220 |
Maturing after 10 years | 1,011,936 |
Debt Securities, Held-to-maturity | 1,059,387 | 1,117,967
Fair Value |  |
Maturing within one year | 6,446 |
Maturing after one year through five years | 18,245 |
Maturing after five years through 10 years | 21,240 |
Maturing after 10 years | 861,583 |
Debt Securities, Held-to-maturity, Fair Value | $ 907,514 | $ 942,180

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