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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2014
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,
| 2014 |  | 2013 |  | 2014 |  | 2013
Numerators: |  |  |  |  |  |  |
Numerator for both basic and diluted EPS, net income | $ | 76,726,746 |  |  | $ | 52,097,397 |  |  | $ | 145,292,817 |  |  | $ | 97,527,964 |
Denominators: |  |  |  |  |  |  |
Denominator for basic EPS, weighted-average shares outstanding | 145,215,130 |  |  | 143,240,333 |  |  | 145,059,684 |  |  | 142,888,337 |
Potentially dilutive shares resulting from stock plans | 1,284,363 |  |  | 770,292 |  |  | 1,558,905 |  |  | 649,655 |
Denominator for diluted EPS | 146,499,493 |  |  | 144,010,625 |  |  | 146,618,589 |  |  | 143,537,992 |
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive | 2,994,629 |  |  | 3,270,342 |  |  | 995,177 |  |  | 3,454,067 |

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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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