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INVESTMENT SECURITIES (Amortized Cost and Estimated Fair Value of Investment Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Amortized Cost    
Due in one year or less $ 3,992  
Due after one year through five years 39,214  
Due after five years through ten years 62,232  
Due after ten years 137,755  
Collateralized loan obligations 40,973  
Amortized Cost 835,361 $ 843,774
Fair Value    
Due in one year or less 4,062  
Due after one year through five years 39,312  
Due after five years through ten years 61,107  
Due after ten years 112,527  
Collateralized loan obligations 40,903  
Fair Value $ 758,683 737,658
Weighted Average Yield    
Due in one year or less (in percent) 5.87%  
Due after one year through five years (in percent) 4.13%  
Due after five years through ten years (in percent) 3.69%  
Due after ten years (in percent) 2.83%  
Collateralized loan obligations 5.78%  
Weighted Average Yield 3.26%  
Amortized Cost    
Due after ten years $ 41,956  
Amortized Cost 570,886 596,930
Fair Value    
Due after ten years 33,540  
Total held-to-maturity securities $ 500,859 506,681
Weighted Average Yield    
Due after ten years (in percent) 2.26%  
Total held-to-maturity securities 1.89%  
Residential - U.S. government-sponsored entities and agencies    
Amortized Cost    
Without single maturity date $ 454,994  
Amortized Cost 454,994 472,476
Fair Value    
Without single maturity date 416,555  
Fair Value $ 416,555 414,471
Weighted Average Yield    
Without single maturity date (in percent) 2.99%  
Amortized Cost    
Without single maturity date $ 528,930  
Amortized Cost 528,930 554,914
Fair Value    
Without single maturity date 467,319  
Total held-to-maturity securities $ 467,319 473,549
Weighted Average Yield    
Without single maturity date (in percent) 1.86%  
Residential - Non-government agencies    
Amortized Cost    
Without single maturity date $ 16,479  
Amortized Cost 16,479 17,836
Fair Value    
Without single maturity date 15,963  
Fair Value $ 15,963 16,926
Weighted Average Yield    
Without single maturity date (in percent) 4.46%  
Commercial - U.S. government-sponsored entities and agencies    
Amortized Cost    
Without single maturity date $ 79,722  
Amortized Cost 79,722 81,400
Fair Value    
Without single maturity date 68,254  
Fair Value $ 68,254 67,161
Weighted Average Yield    
Without single maturity date (in percent) 2.74%  
Commercial - Non-government agencies    
Amortized Cost    
Amortized Cost   9,933
Fair Value    
Fair Value   $ 9,927