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Securities - Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Investments, Debt and Equity Securities [Abstract] |  |
Held to Maturity, amortized cost, due in one year or less | $ 16,053 |
Held to Maturity, amortized cost, due after one year through five years | 41,405 |
Held to Maturity, amortized cost, due after five years through ten years | 33,293 |
Held to Maturity, amortized cost, due after ten years | 7,385 |
Held to Maturity, amortized cost, subtotal | 98,136 |
Held to Maturity, amortized cost, mortgage-backed securities and collateralized mortgage obligations | 10,167,860 |
Held to Maturity, Amortized Cost | 10,265,996 | $ 10,757,464
Held to Maturity, fair value, due in one year or less | 16,042 |
Held to Maturity, fair value, due after one year through five years | 41,020 |
Held to Maturity, fair value, due after five years through ten years | 30,052 |
Held to Maturity, fair value, due after ten years | 6,563 |
Held to Maturity, fair value, subtotal | 93,677 |
Held to Maturity, fair value, mortgage-backed securities and collateralized mortgage obligations | 9,062,347 |
Held to Maturity, fair value, total | 9,156,024 | 9,382,479
Available for Sale, amortized cost, due after five years through ten years | 13,650 |
Available for Sale, amortized cost, subtotal | 13,650 |
Available for Sale, amortized cost, mortgage-backed securities and collateralized mortgage obligations | 330,115 |
Available for Sale, Amortized Cost | 343,765 | 339,016
Available for Sale, fair value, due after five years through ten years | 16,553 |
Available for Sale, fair value, subtotal | 16,553 |
Available for Sale, fair value, mortgage-backed securities and collateralized mortgage obligations | 325,555 |
Available for Sale securities, at fair value | $ 342,108 | $ 336,960

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