Annual report [Section 13 and 15(d), not S-K Item 405]

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
Dec. 31, 2025
Dec. 31, 2024
AFS Securities [Abstract]    
Due in one year or less, Amortized Cost $ 63,692 $ 35,954
Due in one year or less, Estimated Fair Value 63,993 35,808
Due after one year through five years, Amortized Cost 298,683 215,517
Due after one year through five years, Estimated Fair Value 299,727 215,513
Due after five years through ten years, Amortized Cost 492,242 286,487
Due after five years through ten years, Estimated Fair Value 475,707 271,443
Due after ten years, Amortized Cost 3,635,381 2,306,805
Due after ten years, Estimated Fair Value 3,354,874 1,919,402
Total AFS securities 4,489,998 2,844,763
Total AFS securities, Estimated Fair Value 4,194,301 2,442,166
HTM Securities [Abstract]    
Due in one year or less, Carrying Value 507 3,369
Due in one year or less, Estimated Fair Value 503 3,358
Due after one year through five years, Carrying Value 18,813 18,293
Due after one year through five years, Estimated Fair Value 19,150 18,547
Due after five years through ten years, Carrying Value 222,284 115,243
Due after five years through ten years, Estimated Fair Value 216,095 109,358
Due after ten years, Carrying Value 642,612 666,946
Due after ten years, Estimated Fair Value 621,064 628,072
Total HTM Securities 884,216 803,851
Total HTM securities, Estimated Fair Value $ 856,812 $ 759,335