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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share |
Computation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended | ​ | For the Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator (basic and diluted): |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | $ | 585,451 | ​ | $ | 531,667 | ​ | $ | 1,087,060 | ​ | $ | 832,105
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Weighted-average common shares outstanding – basic | ​ |  | 69,618 | ​ |  | 74,205 | ​ |  | 69,997 | ​ |  | 74,611
Effect of stock options (1) | ​ |  | 646 | ​ |  | 628 | ​ |  | 643 | ​ |  | 635
Weighted-average common shares outstanding – assuming dilution | ​ |  | 70,264 | ​ |  | 74,833 | ​ |  | 70,640 | ​ |  | 75,246
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Earnings per share-basic | ​ | $ | 8.41 | ​ | $ | 7.16 | ​ | $ | 15.53 | ​ | $ | 11.15
Earnings per share-assuming dilution | ​ | $ | 8.33 | ​ | $ | 7.10 | ​ | $ | 15.39 | ​ | $ | 11.06
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Antidilutive potential common shares not included in the calculation of diluted earnings per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Stock options (1) | ​ |  | 122 | ​ |  | 341 | ​ |  | 187 | ​ |  | 348
Weighted-average exercise price per share of antidilutive stock options (1) | ​ | $ | 463.76 | ​ | $ | 378.84 | ​ | $ | 449.20 | ​ | $ | 378.29
(1) | See Note 11 for further information concerning the terms of the Company’s share-based compensation plans.
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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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