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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Reconciliation of the average shares outstanding used to compute basic and diluted earnings per share | The following is a reconciliation of the average shares outstanding used to compute basic and diluted earnings per share.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Basic weighted average common shares outstanding | 132,999,781 |  |  | 130,575,165 |  |  | 132,655,172 |  |  | 130,562,923 |
Effect of dilutive securities | 2,112,949 |  |  | 2,816,914 |  |  | 2,374,272 |  |  | 2,989,874 |
Diluted weighted average common shares outstanding | 135,112,730 |  |  | 133,392,079 |  |  | 135,029,444 |  |  | 133,552,797 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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