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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Computation of earnings per share and reconciliation of basic and diluted weighted average common shares outstanding |
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Net income |  | $ | 307,283 |  |  | $ | 259,695 |  |  | $ | 486,544 |  |  | $ | 358,350 |
Amounts allocated to participating securities |  | (1,680) |  |  | — |  |  | (2,762) |  |  | — |
Net income attributable to common stockholders |  | $ | 305,603 |  |  | $ | 259,695 |  |  | $ | 483,782 |  |  | $ | 358,350 |
Weighted average common shares outstanding: |  |  |  |  |  |  |  |
Basic |  | 39,660 |  |  | 40,125 |  |  | 39,795 |  |  | 40,169 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options and employee stock purchase plan |  | 404 |  |  | 620 |  |  | 436 |  |  | 631 |
Diluted |  | 40,064 |  |  | 40,745 |  |  | 40,231 |  |  | 40,800 |
Earnings per share attributable to common stockholders: |  |  |  |  |  |  |  |
Basic |  | $ | 7.71 |  |  | $ | 6.47 |  |  | $ | 12.16 |  |  | $ | 8.92 |
Diluted |  | $ | 7.63 |  |  | $ | 6.37 |  |  | $ | 12.03 |  |  | $ | 8.78 |
Anti-dilutive stock options excluded from diluted earnings per share computations (1) |  | 33 |  |  | — |  |  | 1 |  |  | — |

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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