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Securities (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Amortized cost and fair value of the debt securities maturity    
Amortized Cost, Within one year $ 716  
Amortized Cost, One to five years 39,851  
Amortized Cost, Five to ten years 180,584  
Amortized Cost, Beyond ten years 600,377  
Amortized Cost, Mortgage-backed, collateralized mortgage obligations and Small Business Administration securities 740,322  
Amortized Cost 1,561,850 $ 1,534,512
Fair Value, Within one year 706  
Fair Value, One to five years 37,153  
Fair Value, Five to ten years 159,597  
Fair Value, Beyond ten years 498,403  
Fair Value, Mortgage-backed, collateralized mortgage obligations and Small Business Administration securities 621,019  
Fair Value, Total $ 1,316,878 $ 1,268,025