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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2022
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 six months ended June 30, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
(000’s omitted, except per share data) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Net income | ​ | $ | 39,805 | ​ | $ | 47,944 | ​ | $ | 86,860 | ​ | $ | 100,794
Income attributable to unvested stock-based compensation awards | ​ |  | (125) | ​ |  | (127) | ​ |  | (252) | ​ |  | (263)
Income available to common shareholders | ​ | $ | 39,680 | ​ | $ | 47,817 | ​ | $ | 86,608 | ​ | $ | 100,531
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding – basic | ​ |  | 53,928 | ​ |  | 54,007 | ​ |  | 53,958 | ​ |  | 53,927
Basic earnings per share | ​ | $ | 0.74 | ​ | $ | 0.89 | ​ | $ | 1.61 | ​ | $ | 1.86
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 39,805 | ​ | $ | 47,944 | ​ | $ | 86,860 | ​ | $ | 100,794
Income attributable to unvested stock-based compensation awards | ​ |  | (125) | ​ |  | (127) | ​ |  | (252) | ​ |  | (263)
Income available to common shareholders | ​ | $ | 39,680 | ​ | $ | 47,817 | ​ | $ | 86,608 | ​ | $ | 100,531
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding – basic | ​ |  | 53,928 | ​ |  | 54,007 | ​ |  | 53,958 | ​ |  | 53,927
Assumed exercise of stock options | ​ |  | 293 | ​ |  | 462 | ​ |  | 341 | ​ |  | 455
Weighted-average common shares outstanding – diluted | ​ |  | 54,221 | ​ |  | 54,469 | ​ |  | 54,299 | ​ |  | 54,382
Diluted earnings per share | ​ | $ | 0.73 | ​ | $ | 0.88 | ​ | $ | 1.60 | ​ | $ | 1.85

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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