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GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) segment | Jun. 30, 2022 USD ($) segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Number of operating segments | segment | 2 | 1 |  |  |
Goodwill | $ 925,211 |  | $ 925,211 | $ 935,560 |
Intangible Assets | 26,761 |  | 26,761 | 43,312 |
Impairment of goodwill or intangible assets |  |  | 0 |  |
Intangible assets, amortization expense |  |  | 10,815 | 13,904 | $ 16,574
Wholesale Banking |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 629,630 |  | 629,630 | 629,630 |
Intangible Assets | 0 |  | 0 | 0 |
Consumer Banking |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 295,581 |  | 295,581 | 305,930 |
Intangible Assets | 1,633 |  | 1,633 | 8,327 |
Corporate Other |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 0 |  | 0 | 0 |
Intangible Assets | $ 25,128 |  | $ 25,128 | 34,985 |
DHFB |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill reduction |  | $ 10,300 |  |  |
Intangible assets reduction |  | $ 5,700 |  |  |
Minimum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 4 years |  |
Maximum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 10 years |  |
Core Deposits | Minimum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 4 years |  |
Core Deposits | Maximum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 10 years |  |
Other amortizable intangibles | Minimum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 4 years |  |
Other amortizable intangibles | Maximum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization period (years) |  |  | 10 years |  |
Core Deposits and Other Intangible Assets |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, amortization expense |  |  | $ 10,800 | $ 13,900 | $ 16,600

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