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Investment Securities - Amortized Cost and Estimated Fair Values of Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Pledged available for sale securities |  |
Amortized Cost | $ 271,276 | $ 226,677
Restricted securities | 18,003 | 17,989
Pledged held to maturity securities |  |
Amortized Cost | 393,696 | 414,926
Estimated Fair Value | 356,390 | 378,116
Collateral Pledged |  |
Pledged available for sale securities |  |
Amortized Cost | 74,643 | 75,123
Restricted securities | 71,914 | 69,369
Pledged held to maturity securities |  |
Amortized Cost | 220,597 | 218,556
Estimated Fair Value | $ 198,537 | $ 197,146

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