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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