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Investment Securities - Amortized Cost and Estimated Fair Values of Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Pledged available for sale securities    
Amortized Cost $ 188,267 $ 159,593
Restricted securities 20,364 20,253
Pledged held to maturity securities    
Amortized Cost 433,535 481,280
Estimated Fair Value 393,540 424,734
Collateral Pledged    
Pledged available for sale securities    
Amortized Cost 73,816 76,280
Restricted securities 67,644 67,926
Pledged held to maturity securities    
Amortized Cost 211,434 197,474
Estimated Fair Value $ 191,089 $ 173,248