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INTANGIBLE ASSETS (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2023 USD ($) | Dec. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) segment | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Apr. 01, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  | 2 |  |  |
Goodwill |  | $ 1,214,053 |  | $ 1,214,053 | $ 925,211 |  |
Increase in goodwill |  | 1,300 | $ 5,200 |  |  |  |
Intangible Assets |  | $ 84,563 |  | 84,563 | 19,183 |  |
Impairment of goodwill or intangible assets |  |  |  | 0 |  |  |
Impairment charges for goodwill |  |  |  | 0 |  |  |
Intangible assets, amortization expense |  |  |  | $ 19,307 | 8,781 | $ 10,815 |
Goodwill |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Reallocation of goodwill from Consumer Banking to Wholesale Banking | $ 9,600 |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Reallocation of goodwill from Consumer Banking to Wholesale Banking | $ 1,600 |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, amortization period (years) |  | 4 years |  | 4 years |  |  |
Maximum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, amortization period (years) |  | 15 years |  | 15 years |  |  |
American National |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 288,842 |  | $ 288,842 | $ 0 |  | $ 288,842
Increase in goodwill |  |  |  | 6,500 |  |  |
American National | Wholesale Banking |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  | 210,800 |  | 210,800 |  |  |
American National | Consumer Banking |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 78,000 |  | $ 78,000 |  |  |

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