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Net Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Reconciliation between Basic and Diluted Weighted Average Shares Outstanding | The following is a reconciliation between basic and diluted weighted average shares outstanding:
|  | For the three months ended March 31, |
(in thousands, except per share data) |  | 2021 |  |  | 2020 |
Net income |  | $ | 199,744 |  |  | $ | 152,400 |
Net income attributable to unvested awarded performance stock |  |  | (4,966 | ) |  |  | (5,192 | )
Net income attributable to common shares |  | $ | 194,778 |  |  | $ | 147,208 |
Weighted average number of common shares outstanding – basic |  |  | 282,621 |  |  |  | 282,397 |
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic |  |  | (7,027 | ) |  |  | (9,621 | )
Weighted average number of common shares outstanding for basic net income per common share |  |  | 275,594 |  |  |  | 272,776 |
Dilutive effect of stock options |  |  | 1,361 |  |  |  | 2,085 |
Weighted average number of shares outstanding – diluted |  |  | 276,955 |  |  |  | 274,861 |
Net income per share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.71 |  |  | $ | 0.54 |
Diluted |  | $ | 0.70 |  |  | $ | 0.54 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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