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Weighted Average Common Shares (Tables) | 9 Months Ended
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Sep. 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 September 30, |  | Nine Months Ended September 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average common shares for basic earnings per share |  | 237,511 |  |  | 237,421 |  |  | 237,492 |  |  | 237,404 |
Effect of dilutive securities: unvested share awards |  | 51 |  |  | 39 |  |  | 34 |  |  | 41 |
Weighted average common shares for diluted earnings per share |  | 237,562 |  |  | 237,460 |  |  | 237,526 |  |  | 237,445 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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