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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
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 September 30, |  |  | For the nine months ended September 30, |
(in thousands, except per share data) |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Net income |  | $ | 133,979 |  |  | $ | 115,506 |  |  | $ | 383,163 |  |  | $ | 321,995 |
Net income attributable to unvested awarded performance stock |  |  | (3,740 | ) |  |  | (3,772 | ) |  |  | (12,634 | ) |  |  | (10,386 | )
Net income attributable to common shares |  | $ | 130,239 |  |  | $ | 111,734 |  |  | $ | 370,529 |  |  | $ | 311,609 |
Weighted average number of common shares outstanding – basic |  |  | 283,426 |  |  |  | 282,178 |  |  |  | 283,139 |  |  |  | 281,505 |
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic |  |  | (7,911 | ) |  |  | (9,216 | ) |  |  | (9,336 | ) |  |  | (9,080 | )
Weighted average number of common shares outstanding for basic net income per common share |  |  | 275,515 |  |  |  | 272,962 |  |  |  | 273,803 |  |  |  | 272,425 |
Dilutive effect of stock options |  |  | 1,418 |  |  |  | 2,113 |  |  |  | 1,535 |  |  |  | 2,104 |
Weighted average number of shares outstanding – diluted |  |  | 276,933 |  |  |  | 275,075 |  |  |  | 275,338 |  |  |  | 274,529 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.47 |  |  | $ | 0.41 |  |  | $ | 1.35 |  |  | $ | 1.14 |
Diluted |  | $ | 0.47 |  |  | $ | 0.41 |  |  | $ | 1.35 |  |  | $ | 1.14 |

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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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