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Securities - Contractual Maturities of Debt Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Amortized Cost    
Due in one year or less $ 15,006  
Due after one year through five years 136,217  
Due after five years through ten years 22,400  
Due after ten years 0  
Available-for-Sale Debt Securities With Fixed Maturities 173,623  
Amortized Cost 1,058,471 $ 1,051,313
Fair Value    
Due in one year or less 14,866  
Due after one year through five years 125,958  
Due after five years through ten years 21,852  
Due after ten years 0  
Available-for-Sale Debt Securities With Fixed Maturities 162,676  
Total Available-for-Sale Debt Securities, Fair Value 973,839 969,308
Collateralized mortgage obligations of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 569,806  
Amortized Cost 569,806 507,942
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 519,325  
Total Available-for-Sale Debt Securities, Fair Value 519,325 460,939
Residential mortgage-backed securities of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 42,301  
Amortized Cost 42,301 44,707
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 35,298  
Total Available-for-Sale Debt Securities, Fair Value 35,298 38,177
Commercial mortgage-backed securities of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 272,741  
Amortized Cost 272,741 290,775
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 256,540  
Total Available-for-Sale Debt Securities, Fair Value $ 256,540 $ 273,425