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SECURITIES (Securities Debt Maturities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale Securities, Amortized Cost, Maturing in one year or less $ 31,383  
Available-for-sale Securities, Amortized Cost, Maturing after one year through five years 126,763  
Available-for-sale Securities, Amortized Cost, Maturing after five years through ten years 420,099  
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 1,848,150  
Debt Securities, Available-for-sale, Amortized Cost 2,426,395 $ 2,460,262
Available-for-sale Securities, Fair Value, Maturing in one year or less 31,084  
Available-for-sale Securities, Fair Value, Maturing after one year through five years 121,054  
Available-for-sale Securities, Fair Value, Maturing after five years through ten years 390,844  
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 1,565,963  
Debt Securities, Available-for-sale 2,108,945 2,104,511
Held-to-maturity Securities, Amortized Cost, Maturing in one year or less 3,647  
Held-to-maturity Securities, Amortized Cost, Maturing after one year through five years 19,240  
Held-to-maturity Securities, Amortized Cost, Maturing after five years through ten years 31,580  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 937,621  
Held-to-maturity Securities, Amortized Cost 992,088 1,001,861
Held-to-maturity Securities, Fair Value, Maturing in one year or less 3,496  
Held-to-maturity Securities, Fair Value, Maturing after one year through five years 18,864  
Held-to-maturity Securities, Fair Value, Maturing after five years through ten years 29,101  
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 767,800  
Debt Securities, Held-to-maturity, Fair Value $ 819,261 $ 825,528