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Securities - Amortized Cost and Estimated Fair Value of Investments in Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Available for sale, Amortized Cost |  |
Due in one year or less | $ 133,820 |
Due after one year through five years | 6,782 |
Due after five years through ten years | 24,620 |
Due after ten years | 437,217 |
Total available-for-sale investment securities | 602,439 |
MBS: | 906,713 |
Amortized Cost | 1,509,152 | $ 1,587,416
Available for sale, Fair Value |  |
Due in one year or less | 133,834 |
Due after one year through five years | 6,662 |
Due after five years through ten years | 24,053 |
Due after ten years | 384,183 |
Total available-for-sale investment securities | 548,732 |
MBS: | 909,207 |
Total | 1,457,939 | 1,533,894
Held to maturity, Amortized Cost |  |
Due in one year or less | 4,133 |
Due after one year through five years | 16,584 |
Due after five years through ten years | 130,331 |
Due after ten years | 1,014,663 |
Total held-to-maturity investment securities | 1,165,711 |
Mortgage-backed securities | 112,683 |
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss | 1,278,394 | 1,279,234
Held to maturity, Fair Value |  |
Due in one year or less | 4,134 |
Due after one year through five years | 16,527 |
Due after five years through ten years | 124,048 |
Due after ten years | 859,933 |
Total held-to-maturity investment securities | 1,004,642 |
Mortgage-backed securities | 104,466 |
Total | $ 1,109,108 | $ 1,113,482

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