Quarterly report pursuant to Section 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, 2024
Dec. 31, 2023
AFS Securities [Abstract]    
Due in one year or less, Amortized Cost $ 35,082 $ 52,427
Due in one year or less, Estimated Fair Value 34,745 51,936
Due after one year through five years, Amortized Cost 168,601 150,271
Due after one year through five years, Estimated Fair Value 167,029 149,545
Due after five years through ten years, Amortized Cost 253,073 282,309
Due after five years through ten years, Estimated Fair Value 234,773 261,720
Due after ten years, Amortized Cost 2,156,321 2,130,529
Due after ten years, Estimated Fair Value 1,765,668 1,768,060
Total AFS securities 2,613,078 2,615,536
Total AFS securities, Estimated Fair Value 2,202,216 2,231,261
HTM Securities [Abstract]    
Due in one year or less, Carrying Value 1,048 3,065
Due in one year or less, Estimated Fair Value 1,042 3,058
Due after one year through five years, Carrying Value 31,730 34,093
Due after one year through five years, Estimated Fair Value 32,080 34,613
Due after five years through ten years, Carrying Value 67,865 45,919
Due after five years through ten years, Estimated Fair Value 66,426 45,263
Due after ten years, Carrying Value 728,285 754,301
Due after ten years, Estimated Fair Value 691,797 725,140
Total HTM Securities 828,928 837,378
Total HTM securities, Estimated Fair Value $ 791,345 $ 808,074