v3.26.3
Investment Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost    
Due in one year or less $ 126,819  
Due after one year through five years 595,358  
Due after five years through ten years 87,567  
Due after ten years 28,727  
Mortgage-backed securities 767,934  
Amortized cost of Investment Securities available-for-sale 1,606,405 $ 1,568,429
Contractual maturities of investments in debt securities available-for-sale, Fair Value    
Due in one year or less 125,372  
Due after one year through five years 577,756  
Due after five years through ten years 83,722  
Due after ten years 26,755  
Mortgage-backed securities 694,381  
Total debt securities available-for-sale 1,507,986 1,522,486
Accrued interest receivable on investment securities available-for-sale 8,560 8,040
U.S. Treasury and Federal agencies securities    
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost    
Amortized cost of Investment Securities available-for-sale 732,213 697,652
Contractual maturities of investments in debt securities available-for-sale, Fair Value    
Total debt securities available-for-sale 712,879 696,777
U.S. States and political subdivisions securities    
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost    
Amortized cost of Investment Securities available-for-sale 105,758 113,126
Contractual maturities of investments in debt securities available-for-sale, Fair Value    
Total debt securities available-for-sale 100,247 113,063
Mortgage-backed securities - Federal agencies    
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost    
Amortized cost of Investment Securities available-for-sale 767,934 757,151
Contractual maturities of investments in debt securities available-for-sale, Fair Value    
Total debt securities available-for-sale 694,381 712,143
Corporate debt securities    
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost    
Amortized cost of Investment Securities available-for-sale 500 500
Contractual maturities of investments in debt securities available-for-sale, Fair Value    
Total debt securities available-for-sale $ 479 $ 503