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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS | 3 Months Ended
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Mar. 31, 2021
GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS |
GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS | NOTE F: GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2021 |  | December 31, 2020
​ | ​ | 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 | ​ | $ | (56,896) | ​ | $ | 12,507 | ​ | $ | 69,403 | ​ | $ | (55,572) | ​ | $ | 13,831
Other intangibles | ​ |  | 90,462 | ​ |  | (53,380) | ​ |  | 37,082 | ​ |  | 90,462 | ​ |  | (51,353) | ​ |  | 39,109
Total amortizing intangibles | ​ | $ | 159,865 | ​ | $ | (110,276) | ​ | $ | 49,589 | ​ | $ | 159,865 | ​ | $ | (106,925) | ​ | $ | 52,940
​ The estimated aggregate amortization expense for each of the five succeeding fiscal years ended December 31 is as follows: ​
​ | ​ | ​ | ​
​ |  | (000's omitted)
Apr - Dec 2021 |  | $ | 9,289
2022 | ​ |  | 10,844
2023 | ​ |  | 9,082
2024 | ​ |  | 7,551
2025 | ​ |  | 6,374
Thereafter | ​ |  | 6,449
Total | ​ | $ | 49,589
​ Shown below are the components of the Company’s goodwill at December 31, 2020 and March 31, 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(000’s omitted) |  | December 31, 2020 |  | Activity |  | March 31, 2021 |
Goodwill, net | ​ | $ | 793,708 | ​ | $ | (252) | ​ | $ | 793,456 | ​
​

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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