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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Information Concerning Intangible Assets with Finite Life | The Company analyzed its intangible assets on a quarterly basis throughout 2023, and concluded no impairment existed as of the balance sheet date. Information concerning intangible assets with a finite life is presented in the following table as of December 31, (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Gross |  | ​ | ​ |  | Net
​ | ​ | Carrying | ​ | Accumulated | ​ | Carrying
​ | ​ | Value | ​ | Amortization | ​ | Value
2023 |  | ​ |  |  | ​ |  |  | ​ |
Core deposit intangibles | ​ | $ | 85,491 | ​ | $ | 68,599 | ​ | $ | 16,892
Other amortizable intangibles | ​ |  | 3,977 | ​ |  | 1,686 | ​ |  | 2,291
2022 | ​ |  |  | ​ |  |  | ​ |  |
Core deposit intangibles | ​ | $ | 85,491 | ​ | $ | 60,363 | ​ | $ | 25,128
Other amortizable intangibles | ​ |  | 2,774 | ​ |  | 1,141 | ​ |  | 1,633
Schedule of goodwill and intangible assets by operating segment | The following table presents the Company’s goodwill and intangible assets by operating segment as of December 31, (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Wholesale Banking | ​ | Consumer Banking | ​ | Corporate Other | ​ | Total
2023 |  | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |
Goodwill | ​ | $ | 639,180 | ​ | $ | 286,031 | ​ | $ | — | ​ | $ | 925,211
Intangible Assets | ​ |  | 1,302 | ​ |  | 989 | ​ |  | 16,892 | ​ |  | 19,183
2022 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Goodwill | ​ | $ | 639,180 | ​ | $ | 286,031 | ​ | $ | — | ​ | $ | 925,211
Intangible Assets | ​ |  | 1,558 | ​ |  | 75 | ​ |  | 25,128 | ​ |  | 26,761
Estimated Remaining Amortization Expense of Intangibles | As of December 31, 2023, the estimated remaining amortization expense of intangibles is as follows for the years ended (dollars in thousands): ​
​ | ​ | ​ | ​
2024 |  | $ | 6,936
2025 | ​ | ​ | 5,289
2026 | ​ | ​ | 3,654
2027 | ​ | ​ | 2,068
2028 | ​ | ​ | 843
Thereafter | ​ | ​ | 393
Total estimated amortization expense | ​ | $ | 19,183
​

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