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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Tables) | 3 Months Ended
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Mar. 31, 2019
GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS [Abstract] |
Gross Carrying Amount and Accumulated Amortization of Identifiable Intangible Assets | The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows:
|  | March 31, 2019 |  |  | December 31, 2018 |
(000's omitted) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Amortizing intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangibles |  | $ | 62,902 |  |  | $ | (45,789 | ) |  | $ | 17,113 |  |  | $ | 62,902 |  |  | $ | (44,306 | ) |  | $ | 18,596 |
Other intangibles |  |  | 88,816 |  |  |  | (35,013 | ) |  |  | 53,803 |  |  |  | 87,616 |  |  |  | (32,366 | ) |  |  | 55,250 |
Total amortizing intangibles |  | $ | 151,718 |  |  | $ | (80,802 | ) |  | $ | 70,916 |  |  | $ | 150,518 |  |  | $ | (76,672 | ) |  | $ | 73,846 |
Estimated Aggregate Amortization Expense for Each of Five Succeeding Fiscal Years | The estimated aggregate amortization expense for each of the five succeeding fiscal years ended December 31 is as follows:
(000's omitted) |
Apr - Dec 2019 |  | $ | 11,433 |
2020 |  |  | 12,956 |
2021 |  |  | 11,053 |
2022 |  |  | 9,483 |
2023 |  |  | 7,947 |
Thereafter |  |  | 18,044 |
Total |  | $ | 70,916 |
Components of Goodwill | Shown below are the components of the Company’s goodwill at December 31, 2018 and March 31, 2019:
(000’s omitted) |  | December 31, 2018 |  |  | Activity |  |  | March 31, 2019 |
Goodwill |  | $ | 738,327 |  |  | $ | 0 |  |  | $ | 738,327 |
Accumulated impairment |  |  | (4,824 | ) |  |  | 0 |  |  |  | (4,824 | )
Goodwill, net |  | $ | 733,503 |  |  | $ | 0 |  |  | $ | 733,503 |

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