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Weighted Average Common Shares (Tables) | 12 Months Ended
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Dec. 31, 2017
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):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Weighted average common shares for basic earnings per share | 237,420 |  |  | 237,345 |  |  | 232,931 |
Effect of dilutive securities: restricted share awards | 32 |  |  | 37 |  |  | 32 |
Weighted average common shares for diluted earnings per share | 237,452 |  |  | 237,382 |  |  | 232,963 |

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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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