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Computation of Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Schedule of basic and diluted (loss) earnings per share calculations | The table below sets forth the calculation of basic and diluted income per share for the periods indicated (in thousands, except per share data).
| Three Months Ended |  |
| March 31, |  |
| 2021 |  | 2020 |  |  |  |
Numerator: |  |  |  |  |  |  |
Net income used for calculating basic and diluted income per share | $ | 164,100 |  |  | $ | 75,097 |  |  |  |  |
Denominator: |  |  |  |  |  |  |
Weighted average common shares used in the calculation of basic income per share | 88,352 |  |  | 89,219 |  |  |  |  |
Dilutive effect of outstanding awards associated with stock-based compensation plans (1) | 787 |  |  | 847 |  |  |  |  |
Shares used in the calculation of diluted income per share | 89,139 |  |  | 90,066 |  |  |  |  |
Basic income per share | $ | 1.86 |  |  | $ | 0.84 |  |  |  |  |
Diluted income per share | $ | 1.84 |  |  | $ | 0.83 |  |  |  |  |
(1)Certain potential shares of common stock were not included in the computation of diluted income per share because the effect would have been anti-dilutive. These potential shares of common stock totaled approximately 0.4 million and 0.7 million for the three months ended March 31, 2021, and 2020, respectively.

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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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