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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2022
INCOME TAXES |
Schedule of provision for income taxes | The provision for income taxes for the years ended December 31 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(000’s omitted) |  | 2022 |  | 2021 |  | 2020
Current: |  | ​ |  |  | ​ |  |  | ​ |
Federal | ​ | $ | 41,025 | ​ | $ | 35,507 | ​ | $ | 35,728
State and other | ​ |  | 9,899 | ​ |  | 8,158 | ​ |  | 8,008
Deferred: | ​ |  | ​ | ​ |  |  | ​ |  |
Federal | ​ |  | 1,163 | ​ |  | 5,493 | ​ |  | (2,005)
State and other | ​ |  | 146 | ​ |  | 2,496 | ​ |  | (331)
Provision for income taxes | ​ | $ | 52,233 | ​ | $ | 51,654 | ​ | $ | 41,400
​
Schedule of net deferred tax liability | Components of the net deferred tax asset, included in other assets, as of December 31, 2022 and of the net deferred tax liability, included in other liabilities, as of December 31, 2021 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(000’s omitted) |  | 2022 |  | 2021
Investment securities | ​ | $ | 191,953 | ​ | $ | 0
Allowance for credit losses | ​ | ​ | 15,346 | ​ | ​ | 12,435
Employee benefits | ​ |  | 5,775 | ​ |  | 7,708
Operating lease liabilities | ​ |  | 7,552 | ​ |  | 7,955
Other, net | ​ |  | 4,385 | ​ |  | 1,250
Deferred tax asset | ​ |  | 225,011 | ​ |  | 29,348
​ | ​ | ​ | ​ | ​ | ​ | ​
Investment securities | ​ |  | 0 | ​ |  | 7,227
Goodwill and intangibles | ​ |  | 39,454 | ​ |  | 41,917
Operating lease right-of-use assets | ​ |  | 7,303 | ​ |  | 7,693
Loan origination costs | ​ |  | 9,731 | ​ |  | 8,993
Depreciation | ​ |  | 96 | ​ |  | 535
Mortgage servicing rights | ​ |  | 640 | ​ |  | 278
Pension | ​ |  | 18,154 | ​ |  | 22,950
Deferred tax liability | ​ |  | 75,378 | ​ |  | 89,593
Net deferred tax asset (liability) | ​ | $ | 149,633 | ​ | $ | (60,245)
​
Schedule of reconciliation of the differences between the federal statutory income tax rate | A reconciliation of the differences between the federal statutory income tax rate and the effective tax rate for the years ended December 31 is shown in the following table: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020 |
Federal statutory income tax rate |  | 21.0 | % | 21.0 | % | 21.0 | %
Increase (reduction) in taxes resulting from: |  | ​ |  |  |  |  | ​
Tax-exempt interest |  | (1.3) |  | (1.1) |  | (1.5) | ​
State income taxes, net of federal benefit |  | 3.3 |  | 3.6 |  | 3.0 | ​
Stock-based compensation |  | (0.3) |  | (0.9) |  | (0.8) | ​
Federal tax credits |  | (1.0) |  | (1.0) |  | (1.3) | ​
Other, net |  | 0.0 |  | (0.2) |  | (0.3) | ​
Effective income tax rate |  | 21.7 | % | 21.4 | % | 20.1 | %
​

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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