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Earnings Per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Earnings per share | NOTE 9 – EARNINGS PER SHARE The following table illustrates the computation of basic and diluted earnings per share for the three months ended March 31, 2019 and 2018 (in thousands, except per share data):
| For the Three Months Ended March 31,
| 2019 |  | 2018
Numerator (basic and diluted): |  |  |
Net income | $ | 321,152 |  |  | $ | 304,906 |
Denominator: |  |  |
Weighted-average common shares outstanding – basic | 78,484 |  |  | 83,530 |
Effect of stock options (1) | 813 |  |  | 993 |
Weighted-average common shares outstanding – assuming dilution | 79,297 |  |  | 84,523 |
Earnings per share: |  |  |
Earnings per share-basic | $ | 4.09 |  |  | $ | 3.65 |
Earnings per share-assuming dilution | $ | 4.05 |  |  | $ | 3.61 |
Antidilutive potential common shares not included in the calculation of diluted earnings per share: |  |  |
Stock options (1) | 176 |  |  | 761 |
Weighted-average exercise price per share of antidilutive stock options (1) | $ | 347.98 |  |  | $ | 259.28 |
(1) | See Note 8 for further information concerning the terms of the Company’s share-based compensation plans.
For the three months ended March 31, 2019 and 2018, the computation of diluted earnings per share did not include certain securities. These securities represent underlying stock options not included in the computation of diluted earnings per share, because the inclusion of such equity awards would have been antidilutive. Subsequent to the end of the first quarter and through May 6, 2019, the Company repurchased an additional 0.1 million shares of its common stock under its share repurchase program, at an average price of $377.59, for a total investment of $52.1 million.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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