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Securities - Contractual Maturities of Debt Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Amortized Cost    
Due in one year or less $ 29,913  
Due after one year through five years 71,560  
Due after five years through ten years 0  
Due after ten years 0  
Available-for-Sale Debt Securities With Fixed Maturities 101,473  
Amortized Cost 1,038,627 $ 1,058,154
Fair Value    
Due in one year or less 29,892  
Due after one year through five years 69,313  
Due after five years through ten years 0  
Due after ten years 0  
Available-for-Sale Debt Securities With Fixed Maturities 99,205  
Total Available-for-Sale Debt Securities, Fair Value 999,830 986,415
Collateralized mortgage obligations of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 665,945  
Amortized Cost 665,945 643,690
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 637,536  
Total Available-for-Sale Debt Securities, Fair Value 637,536 596,284
Residential mortgage-backed securities of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 36,950  
Amortized Cost 36,950 40,109
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 31,856  
Total Available-for-Sale Debt Securities, Fair Value 31,856 33,207
Commercial mortgage-backed securities of U.S. government corporations and agencies    
Amortized Cost    
Available-for-Sale Debt Securities With Fixed Maturities 234,259  
Amortized Cost 234,259 237,270
Fair Value    
Available-for-Sale Debt Securities With Fixed Maturities 231,233  
Total Available-for-Sale Debt Securities, Fair Value $ 231,233 $ 224,798