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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Tables) | 3 Months Ended
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Mar. 31, 2022
GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS |
Schedule of gross carrying amount and accumulated amortization for each type of identifiable intangible asset | The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022 |  | December 31, 2021
​ | ​ | Gross | ​ | ​ | ​ | ​ | Net | ​ | Gross | ​ | ​ | ​ | ​ | Net
​ |  | Carrying |  | Accumulated |  | Carrying |  | Carrying |  | Accumulated |  | Carrying
(000’s omitted) | ​ | Amount |  | Amortization |  | Amount |  | Amount |  | Amortization |  | Amount
Amortizing intangible assets: | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Core deposit intangibles | ​ | $ | 69,403 | ​ | $ | (61,362) | ​ | $ | 8,041 | ​ | $ | 69,403 | ​ | $ | (60,316) | ​ | $ | 9,087
Other intangibles | ​ |  | 119,263 | ​ |  | (63,346) | ​ |  | 55,917 | ​ |  | 116,799 | ​ |  | (60,660) | ​ |  | 56,139
Total amortizing intangibles | ​ | $ | 188,666 | ​ | $ | (124,708) | ​ | $ | 63,958 | ​ | $ | 186,202 | ​ | $ | (120,976) | ​ | $ | 65,226
Schedule of 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 2022 | ​ | $ | 10,341
2023 | ​ | ​ | 11,936
2024 | ​ |  | 10,072
2025 | ​ |  | 8,594
2026 | ​ |  | 7,718
Thereafter | ​ |  | 15,297
Total | ​ | $ | 63,958
Schedule of components of goodwill | Shown below are the components of the Company’s goodwill at December 31, 2021 and March 31, 2022: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(000’s omitted) |  | December 31, 2021 |  | Activity |  | March 31, 2022
Goodwill | ​ | $ | 799,109 | ​ | $ | (29) | ​ | $ | 799,080

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