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Investment Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Jul. 31, 2024
Investment Securities      
Securities available for sale, amortized cost, due in one year or less $ 78,907    
Securities available for sale, fair value, due in one year or less 77,724    
Securities available for sale, amortized cost, due in one year through five years 39,065    
Securities available for sale, fair value, due in one year through five years 37,498    
Securities available for sale, amortized cost, due after five years through ten years 72,513    
Securities available for sale, fair value, due after five years through ten years 66,444    
Securities held to maturity, amortized cost, due after five years through ten years 2,000    
Securities held to maturity, fair value, due after five years through ten years 1,600    
Securities available for sale, amortized cost, due after ten years 64,003    
Securities available for sale, fair value, due after ten years 59,279    
Securities held to maturity, amortized cost, due after ten years 5,000    
Securities held to maturity, fair value, due after ten years 3,732    
Securities available for sale, amortized cost, allocated and single maturity date 254,488    
Securities available for sale, fair value, allocated and single maturity date 240,945    
Securities held to maturity, amortized cost, allocated and single maturity date 7,000    
Securities held to maturity, fair value, allocated and single maturity date 5,332    
Securities available for sale, amortized cost, without single maturity date 184,731    
Securities available for sale, fair value, without single maturity date 180,682    
Securities available for sale, amortized cost 439,219 $ 418,935  
Securities available for sale, fair value 421,627 389,243  
Securities held to maturity, amortized cost 7,000 7,000 $ 2,000
Securities held to maturity, fair value $ 5,332 $ 4,591