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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2021
EARNINGS PER SHARE |
Computation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator: |  | ​ | ​ |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | $ | 31,757 | ​ | $ | 58,479 | ​ | $ | 202,039 | ​ | $ | 141,037
Denominator (shares in 000's): | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Basic weighted average shares outstanding | ​ |  | 59,289 | ​ |  | 59,426 | ​ |  | 59,465 | ​ |  | 59,655
Effect of dilutive securities - Stock options and awards | ​ |  | 766 | ​ |  | 592 | ​ |  | 703 | ​ |  | 547
Diluted weighted average shares outstanding | ​ |  | 60,055 | ​ |  | 60,018 | ​ |  | 60,168 | ​ |  | 60,202
Basic earnings per share | ​ | $ | 0.54 | ​ | $ | 0.98 | ​ | $ | 3.40 | ​ | $ | 2.36
Diluted earnings per share | ​ | $ | 0.53 | ​ | $ | 0.97 | ​ | $ | 3.36 | ​ | $ | 2.34

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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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