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GOODWILL AND INTANGIBLE ASSETS (Schedule of Information Concerning Intangible Assets with Finite Life) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Apr. 01, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill, Gross Carrying Value | $ 925,211 |  | $ 925,211
Goodwill | 1,212,710 |  | 925,211
Accumulated Amortization, Goodwill | 0 |  | 0
Total estimated amortization expense | 90,176 |  |
American National |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill | 287,499 | $ 287,499 | 0
Initial goodwill |  | $ 282,300 |
Core Deposits [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value | 85,491 |  | 85,491
Accumulated Amortization | (80,828) |  | (68,599)
Total estimated amortization expense | 79,073 |  | 16,892
Core Deposits [Member] | American National |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value | 74,410 |  | 0
Other Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value | 3,977 |  | 3,977
Accumulated Amortization | (3,151) |  | (1,686)
Total estimated amortization expense | 11,103 |  | 2,291
Other Intangible Assets [Member] | American National |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value | $ 10,277 |  | $ 0

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