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Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity - Securities Available-for-sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Available-for-sale, Amortized Cost    
Due after three months through one year $ 66,001  
Due after one through five years 364,412  
Agency mortgage-backed securities 73,817  
Total 504,230 $ 505,713
Available-for-sale, Estimated Fair Value    
Due after three months through one year 65,614  
Due after one year through five years 357,289  
Agency mortgage-backed securities 68,848  
Total $ 491,751 $ 489,596