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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2023
EARNINGS PER SHARE |
Schedule of reconciliation of basic to diluted earnings per share | The following is a reconciliation of basic to diluted earnings per share for the three and nine months ended September 30, 2023 and 2022: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
(000’s omitted, except per share data) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Net income | ​ | $ | 44,129 | ​ | $ | 48,691 | ​ | $ | 98,218 | ​ | $ | 135,551
Income attributable to unvested stock-based compensation awards | ​ |  | (158) | ​ |  | (142) | ​ |  | (327) | ​ |  | (386)
Income available to common shareholders | ​ | $ | 43,971 | ​ | $ | 48,549 | ​ | $ | 97,891 | ​ | $ | 135,165
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding – basic | ​ |  | 53,502 | ​ |  | 53,830 | ​ |  | 53,673 | ​ |  | 53,915
Basic earnings per share | ​ | $ | 0.82 | ​ | $ | 0.90 | ​ | $ | 1.82 | ​ | $ | 2.51
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 44,129 | ​ | $ | 48,691 | ​ | $ | 98,218 | ​ | $ | 135,551
Income attributable to unvested stock-based compensation awards | ​ |  | (158) | ​ |  | (142) | ​ |  | (327) | ​ |  | (386)
Income available to common shareholders | ​ | $ | 43,971 | ​ | $ | 48,549 | ​ | $ | 97,891 | ​ | $ | 135,165
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding – basic | ​ |  | 53,502 | ​ |  | 53,830 | ​ |  | 53,673 | ​ |  | 53,915
Assumed exercise of stock options | ​ |  | 104 | ​ |  | 302 | ​ |  | 135 | ​ |  | 328
Weighted-average common shares outstanding – diluted | ​ |  | 53,606 | ​ |  | 54,132 | ​ |  | 53,808 | ​ |  | 54,243
Diluted earnings per share | ​ | $ | 0.82 | ​ | $ | 0.90 | ​ | $ | 1.82 | ​ | $ | 2.49

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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