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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share Basic And Diluted | The following table reconciles the numerators and denominators used in the calculation of basic and diluted earnings per share (EPS):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Numerators: |  |  |  |  |  |  |
Numerator for both basic and diluted EPS, net income | $ | 109,023,982 |  | $ | 88,535,947 |  | $ | 220,272,725 |  | $ | 186,092,688
Denominators: |  |  |  |  |  |  |
Denominator for basic EPS, weighted-average shares outstanding | 271,747,049 |  | 286,722,482 |  | 273,085,191 |  | 286,956,367
Potentially dilutive shares resulting from stock plans | 2,375,449 |  | 3,120,420 |  | 2,575,227 |  | 3,581,875
Denominator for diluted EPS | 274,122,498 |  | 289,842,902 |  | 275,660,418 |  | 290,538,242
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive | 24,231 |  | 873,937 |  | 12,182 |  | 109,597

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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/2003/role/presentationRef -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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