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Per Common Share Amounts | 12 Months Ended
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Dec. 31, 2014
Earnings Per Share [Abstract] |
Per common share amounts | Note 12. Per Common Share Amounts The following table provides a reconciliation of the weighted average number of common shares used in the computation of basic and diluted EPS. Unvested share-based payment awards that contain non-forfeitable rights to dividends are considered participating securities and are included in our computation of basic and diluted EPS using the two-class method. Other potentially dilutive common shares, including contingently issuable common shares under our business management agreement with RMR, restricted shares, and the related impact on earnings, are considered when calculating diluted EPS (in thousands):
|  | Year Ended December 31,
|  | 2014 |  | 2013 |  | 2012
Weighted average common shares for basic earnings per share |  |  | 198,868 |  |  | 187,271 |  |  | 169,508
Effect of dilutive securities: restricted share awards |  |  | 26 |  |  | 143 |  |  | 163
Weighted average common shares for diluted earnings per share |  |  | 198,894 |  |  | 187,414 |  |  | 169,671
We had no anti-dilutive common share equivalents outstanding for the years ended December 31, 2014, 2013 and 2012.

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