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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2022
Earnings Per Share Abstract |
Earnings per share calculation | A summary of the earnings per share calculation is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
(In thousands, except per share amounts) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Basic earnings per share: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | $ | 45,964 | ​ | $ | 42,034 | ​ | $ | 148,036 | ​ | $ | 123,713
Weighted-average common shares | ​ |  | 57,172 | ​ |  | 60,319 | ​ |  | 58,039 | ​ |  | 60,350
Basic earnings per share | ​ | $ | 0.80 | ​ | $ | 0.70 | ​ | $ | 2.55 | ​ | $ | 2.05
Diluted earnings per share: (1) | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Net income | ​ | $ | 45,964 | ​ | $ | 42,034 | ​ | $ | 148,036 | ​ | $ | 123,713
Weighted-average common shares | ​ |  | 57,172 | ​ |  | 60,319 | ​ |  | 58,039 | ​ |  | 60,350
Effect of dilutive awards: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Employee stock plans | ​ |  | 431 | ​ |  | 1,044 | ​ |  | 596 | ​ |  | 1,116
Diluted weighted-average common shares | ​ |  | 57,603 | ​ |  | 61,363 | ​ |  | 58,635 | ​ |  | 61,466
Diluted earnings per share | ​ | $ | 0.80 | ​ | $ | 0.69 | ​ | $ | 2.52 | ​ | $ | 2.01
​
(1) | The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2022 and 2021 calculations as the shares were not contingently issuable as of the end of the reporting periods.

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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=124432515&loc=d3e3550-109257 + Details
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