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Securities - Contractual Maturities (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Securities Available-for-Sale, Amortized Cost    
Due in one year or less $ 104,295  
Due after one year through five years 157,181  
Due after five years through ten years 93,379  
Due after ten years 91,852  
Debt securities excluding securities not due at a single maturity date 446,707  
Total $ 1,205,214 $ 1,230,328
Securities Available-for-Sale, Weighted Average Yield    
Due in one year or less (as a percent) 3.93%  
Due after one year through five years (as a percent) 3.94%  
Due after five years through ten years (as a percent) 2.94%  
Due after ten years (as a percent) 3.21%  
Debt securities (as a percent) 3.58%  
Total (as a percent) 3.63%  
Securities Available-for-Sale, Fair Value    
Due in one year or less $ 104,189  
Due after one year through five years 157,690  
Due after five years through ten years 89,505  
Due after ten years 88,225  
Debt securities 439,609  
Debt Securities, Available-for-sale, Total 1,157,480 1,161,701
Mortgage-backed and collateralized mortgage obligations    
Securities Available-for-Sale, Amortized Cost    
Securities not due at a single maturity date $ 511,196  
Securities Available-for-Sale, Weighted Average Yield    
Securities not due at a single maturity date, Weighted Average Yield (as a percent) 2.81%  
Securities Available-for-Sale, Fair Value    
Securities not due at a single maturity date $ 471,287  
Asset-backed Securities    
Securities Available-for-Sale, Amortized Cost    
Securities not due at a single maturity date 48,767  
Total $ 48,767 64,215
Securities Available-for-Sale, Weighted Average Yield    
Securities not due at a single maturity date, Weighted Average Yield (as a percent) 4.05%  
Securities Available-for-Sale, Fair Value    
Securities not due at a single maturity date $ 47,802  
Debt Securities, Available-for-sale, Total 47,802 62,303
Collateralized loan obligations.    
Securities Available-for-Sale, Amortized Cost    
Securities not due at a single maturity date 197,860  
Total $ 197,860 182,629
Securities Available-for-Sale, Weighted Average Yield    
Securities not due at a single maturity date, Weighted Average Yield (as a percent) 5.74%  
Securities Available-for-Sale, Fair Value    
Securities not due at a single maturity date $ 198,098  
Debt Securities, Available-for-sale, Total 198,098 $ 183,092
Equity Securities    
Securities Available-for-Sale, Amortized Cost    
Securities not due at a single maturity date 684  
Total 684  
Securities Available-for-Sale, Fair Value    
Securities not due at a single maturity date 684  
Debt Securities, Available-for-sale, Total $ 684