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v3.24.3

GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) segment | Sep. 30, 2023 USD ($) | Apr. 01, 2024 USD ($) | Dec. 31, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Number of operating segments | segment |  |  | 2 |  |  |
Goodwill | $ 1,212,710,000 |  | $ 1,212,710,000 |  |  | $ 925,211,000
Intangible Assets | 90,176,000 |  | 90,176,000 |  |  | 19,183,000
Impairment of goodwill or intangible assets |  |  | 0 |  |  |
Intangible assets, amortization expense | 5,804,000 | $ 2,193,000 | 13,693,000 | $ 6,687,000 |  |
Wholesale Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 845,239,000 |  | 845,239,000 |  |  | 639,180,000
Intangible Assets | 9,032,000 |  | 9,032,000 |  |  | 1,302,000
Consumer Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 362,245,000 |  | 362,245,000 |  |  | 286,031,000
Intangible Assets | 830,000 |  | 830,000 |  |  | 989,000
Corporate Other |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 5,226,000 |  | 5,226,000 |  |  | 0
Intangible Assets | $ 80,314,000 |  | $ 80,314,000 |  |  | 16,892,000
Core Deposits [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible assets, amortization period (years) | 4 years |  | 4 years |  |  |
Core Deposits [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible assets, amortization period (years) | 10 years |  | 10 years |  |  |
Other Intangible Assets [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible assets, amortization period (years) | 4 years |  | 4 years |  |  |
Other Intangible Assets [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible assets, amortization period (years) | 10 years |  | 10 years |  |  |
American National |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | $ 287,499,000 |  | $ 287,499,000 |  | $ 287,499,000 | $ 0
Increase in goodwill | 5,200,000 |  |  |  |  |
American National | Wholesale Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 209,900,000 |  | 209,900,000 |  | 209,900,000 |
Intangible Assets | 8,400,000 |  | 8,400,000 |  |  |
American National | Consumer Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 77,600,000 |  | 77,600,000 |  | $ 77,600,000 |
American National | Corporate Other |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible Assets | $ 76,300,000 |  | $ 76,300,000 |  |  |

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