Quarterly report [Sections 13 or 15(d)]

SECURITIES AND OTHER INVESTMENTS (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details)

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SECURITIES AND OTHER INVESTMENTS (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
AFS Securities [Abstract]    
Due in one year or less, Amortized Cost $ 20,877 $ 35,954
Due in one year or less, Estimated Fair Value 20,790 35,808
Due after one year through five years, Amortized Cost 225,718 215,517
Due after one year through five years, Estimated Fair Value 226,577 215,513
Due after five years through ten years, Amortized Cost 288,239 286,487
Due after five years through ten years, Estimated Fair Value 270,629 271,443
Due after ten years, Amortized Cost 2,331,038 2,306,805
Due after ten years, Estimated Fair Value 1,965,839 1,919,402
Total AFS securities 2,865,872 2,844,763
Total AFS securities, Estimated Fair Value 2,483,835 2,442,166
HTM Securities [Abstract]    
Due in one year or less, Carrying Value 0 3,369
Due in one year or less, Estimated Fair Value 0 3,358
Due after one year through five years, Carrying Value 18,744 18,293
Due after one year through five years, Estimated Fair Value 19,041 18,547
Due after five years through ten years, Carrying Value 142,875 115,243
Due after five years through ten years, Estimated Fair Value 135,547 109,358
Due after ten years, Carrying Value 659,440 666,946
Due after ten years, Estimated Fair Value 617,824 628,072
Total HTM Securities 821,059 803,851
Total HTM securities, Estimated Fair Value $ 772,412 $ 759,335