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Securities, AFS Debt Securities, Contractual Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Available-for-sale Securities, Debt Maturities, Amortized Cost [Abstract]    
Within one year $ 50,294  
From one to five years 567,513  
From five to ten years 314,839  
After ten years 675,337  
Amortized cost 1,607,983 $ 1,615,078
Available-for-sale Securities, Debt Maturities, Estimated Fair Value [Abstract]    
Within one year 49,553  
From one to five years 508,211  
From five to ten years 277,648  
After ten years 583,059  
Fair value $ 1,418,471 $ 1,430,858