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Securities - Schedule of AFS Debt Securities, by Maturity Date (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Amortized Cost    
Within one year $ 4,294  
After one year but within five years 25,471  
After five years but within ten years 140,263  
After ten years 513,677  
Amortized Cost 683,705 $ 613,393
Fair Value    
Within one year 4,270  
After one year but within five years 25,178  
After five years but within ten years 132,751  
After ten years 474,480  
Fair Value 636,679 550,148
Amortized Cost    
Within one year 0  
After one year but within five years 0  
After five years but within ten years 940  
After ten years 123,913  
Total Securities HTM 124,853 131,796
Fair Value    
Within one year 0  
After one year but within five years 0  
After five years but within ten years 873  
After ten years 105,967  
Total Securities HTM $ 106,840 $ 108,990