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SECURITIES - Amortized Cost and Estimated Fair Value of Investments in Debt Securities By Contractual Maturity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Available for sale, Amortized Cost      
Due in one year or less $ 176,153    
Due after one year through five years 2,299    
Due after five years through ten years 25,117    
Due after ten years 442,970    
Total available-for-sale investment securities 646,539    
Mortgage-backed Securities 940,877    
Amortized cost 1,587,416 $ 1,332,467  
Available for sale Securities, Fair Value      
Due in one year or less 176,226    
Due after one year through five years 2,296    
Due after five years through ten years 24,718    
Due after ten years 399,556    
Subtotal 602,796    
Mortgage-backed Securities and Other Equity Securities 931,098    
Total 1,533,894 1,296,294  
Held to Maturity, Amortized Cost      
Due in one year or less 4,125    
Due after one year through five years 16,387    
Due after five years through ten years 128,894    
Due after ten years 1,015,601    
Subtotal 1,165,007    
Mortgage-backed Securities 114,227    
Amortized Cost 1,279,234 1,307,053  
Held to Maturity, Fair Value      
Due in one year or less 4,111    
Due after one year through five years 16,157    
Due after five years through ten years 121,652    
Due after ten years 867,858    
Subtotal 1,009,778    
Mortgage-backed Securities 103,704    
Total 1,113,482 1,166,162  
Interest and Other Income $ 113,766 $ 105,265 $ 80,580