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EARNINGS PER-SHARE (Tables) | 3 Months Ended
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Mar. 31, 2021
EARNINGS PER-SHARE |
Schedule of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, 2021 | ​ | Three Months Ended March 31, 2020 | ​
​ |  | ​ | ​ |  | Weighted |  | Per |  | ​ | ​ |  | Weighted |  | Per |
​ | ​ | ​ | ​ | ​ | Average | ​ | Common | ​ | ​ | ​ | ​ | Average | ​ | Common |
​ | ​ | Net | ​ | Common | ​ | Share | ​ | Net | ​ | Common | ​ | Share |
(In millions, except per share amounts) | ​ | Income | ​ | Shares | ​ | Amount | ​ | Income | ​ | Shares | ​ | Amount |
Basic: | ​ | $ | 87.2 |  | 43.4 | ​ | $ | 2.01 | ​ | $ | 3.8 |  | 43.0 | ​ | $ | 0.09 | ​
Effect of Dilutive Securities: | ​ | ​ | ​ |  | 0.4 | ​ | ​ | (0.02) | ​ | ​ | ​ |  | 0.3 | ​ | ​ | — | ​
Diluted: | ​ | $ | 87.2 | ​ | 43.8 | ​ | $ | 1.99 | ​ | $ | 3.8 | ​ | 43.3 | ​ | $ | 0.09 | ​

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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 http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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