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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Summary of Earnings Per Share, Basic and Diluted | The calculation and reconciliation of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 is as follows (in thousands, except per share data):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Net income |  | $ | 234,007 |  |  | $ | 188,817 |  |  | $ | 614,493 |  |  | $ | 494,365 |
Denominator for basic earnings per share |  | 81,836 |  |  | 83,719 |  |  | 82,811 |  |  | 84,170 |
Dilutive securities |  | 1,880 |  |  | 2,554 |  |  | 2,106 |  |  | 2,836 |
Denominator for diluted earnings per share |  | 83,716 |  |  | 86,273 |  |  | 84,917 |  |  | 87,006 |
Basic earnings per share |  | $ | 2.86 |  |  | $ | 2.26 |  |  | $ | 7.42 |  |  | $ | 5.87 |
Diluted earnings per share |  | $ | 2.80 |  |  | $ | 2.19 |  |  | $ | 7.24 |  |  | $ | 5.68 |

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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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