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INVESTMENT SECURITIES (Amortized Cost and Estimated Fair Value of Investment Securities) (Details) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Amortized Cost    
Due in one year or less $ 4,237,000  
Due after one year through five years 37,393,000  
Due after five years through ten years 68,257,000  
Due after ten years 120,988,000  
Collateralized loan obligations 31,254,000  
Amortized Cost 843,774,000 $ 754,950,000
Fair Value    
Due in one year or less 4,230,000  
Due after one year through five years 36,866,000  
Due after five years through ten years 65,126,000  
Due after ten years 91,811,000  
Collateralized loan obligations 31,140,000  
Fair Value $ 737,658,000 647,210,000
Weighted Average Yield    
Due in one year or less (in percent) 5.87%  
Due after one year through five years (in percent) 4.11%  
Due after five years through ten years (in percent) 3.87%  
Due after ten years (in percent) 2.42%  
Collateralized loan obligations 6.07%  
Weighted Average Yield 3.18%  
Amortized Cost    
Due after ten years $ 42,016,000  
Amortized Cost 596,930,000 632,338,000
Fair Value    
Due after ten years 33,132,000  
Total held-to-maturity investment securities $ 506,681,000 565,178,000
Weighted Average Yield    
Due after ten years (in percent) 2.26%  
Total held-to-maturity investment securities 1.92%  
Investments $ 1,440,704,000  
Investment securities $ 1,244,339,000  
Total Investment Securities, Weighted Average Yield 0.0262  
Residential - U.S. Government-sponsored enterprises    
Amortized Cost    
Without single maturity date $ 472,476,000  
Amortized Cost 472,476,000 441,898,000
Fair Value    
Without single maturity date 414,471,000  
Fair Value $ 414,471,000 378,386,000
Weighted Average Yield    
Without single maturity date (in percent) 2.90%  
Amortized Cost    
Without single maturity date $ 554,914,000  
Amortized Cost 554,914,000 590,379,000
Fair Value    
Without single maturity date 473,549,000  
Total held-to-maturity investment securities $ 473,549,000 529,925,000
Weighted Average Yield    
Without single maturity date (in percent) 1.89%  
Residential - Non-Government Agencies    
Amortized Cost    
Without single maturity date $ 17,836,000  
Amortized Cost 17,836,000 19,322,000
Fair Value    
Without single maturity date 16,926,000  
Fair Value $ 16,926,000 18,708,000
Weighted Average Yield    
Without single maturity date (in percent) 4.36%  
Commercial - U.S. Government-sponsored enterprises    
Amortized Cost    
Without single maturity date $ 81,400,000  
Amortized Cost 81,400,000 58,318,000
Fair Value    
Without single maturity date 67,161,000  
Fair Value $ 67,161,000 50,914,000
Weighted Average Yield    
Without single maturity date (in percent) 2.72%  
Commercial - Non-government agencies    
Amortized Cost    
Without single maturity date $ 9,933,000  
Amortized Cost 9,933,000 15,144,000
Fair Value    
Without single maturity date 9,927,000  
Fair Value $ 9,927,000 $ 14,956,000
Weighted Average Yield    
Without single maturity date (in percent) 4.76%