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Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity - Securities Available-for-sale (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Available-for-sale, Amortized Cost    
Due three months or less $ 19,953  
Due after three months through one year 193,476  
Due after one through five years 174,561  
Agency mortgage-backed securities 64,580  
Total 452,570 $ 505,713
Available-for-sale, Estimated Fair Value    
Due 3 months or less 19,920  
Due after three months through one year 191,662  
Due after one year through five years 170,787  
Agency mortgage-backed securities 60,267  
Total $ 442,636 $ 489,596