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Securities (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Amortized cost and fair value of the debt securities maturity    
Amortized Cost, Within one year $ 600  
Amortized Cost, One to five years 26,877  
Amortized Cost, Five to ten years 195,318  
Amortized Cost, Beyond ten years 545,625  
Amortized Cost, Mortgage-backed, collateralized mortgage obligations and Small Business Administration securities 735,911  
Amortized Cost 1,504,331 $ 1,516,841
Fair Value, Within one year 596  
Fair Value, One to five years 24,734  
Fair Value, Five to ten years 175,931  
Fair Value, Beyond ten years 453,686  
Fair Value, Mortgage-backed, collateralized mortgage obligations and Small Business Administration securities 615,202  
Fair Value, Total $ 1,270,149 $ 1,299,701