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Securities - Schedule of Available-for-Sales Securities Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Total | $ 582,411 | $ 679,203
Mortgage-backed securities | 827,994 | 869,279
Amortized Cost | 1,410,405 | 1,548,482
Fair Value |  |
Total | 564,226 | 650,580
Mortgage-backed securities | 745,053 | 766,070
Fair Value | 1,309,279 | 1,416,650
Available-for-sale securities |  |
Amortized Cost |  |
Due in one year or less | 109,842 | 99,242
Due after one year through five years | 226,448 | 307,093
Due after five years through ten years | 223,794 | 245,617
Due after ten years | 22,327 | 27,251
Fair Value |  |
Due in one year or less | 108,632 | 98,650
Due after one year through five years | 219,556 | 296,279
Due after five years through ten years | 217,790 | 233,569
Due after ten years | $ 18,248 | $ 22,082

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