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Weighted Average Common Shares (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of weighted average number of shares | The following table provides a reconciliation of the weighted average number of common shares used in the calculation of basic and diluted earnings per share (in thousands):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average common shares for basic earnings per share |  | 237,487 |  |  | 237,399 |  |  | 237,483 |  |  | 237,395 |
Effect of dilutive securities: unvested share awards |  | 42 |  |  | 46 |  |  | 23 |  |  | 38 |
Weighted average common shares for diluted earnings per share |  | 237,529 |  |  | 237,445 |  |  | 237,506 |  |  | 237,433 |

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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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