Per Common Share Amounts

6 Months Ended

Jun. 30, 2015

Note 12. Per Common Share Amounts

We calculate basic earnings per common share by dividing allocable net income by the weighted average number of common shares outstanding during the period. We calculate diluted earnings per common share by using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, including contingently issuable common shares under the then existing terms of our business management agreement with RMR LLC as further described in Note 10, if any, and the related impact on earnings, are considered when calculating diluted earnings per share. 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,
	2015		2014		2015		2014
Weighted average common shares for basic earnings per share		235,549		199,830		228,501		193,962
Effect of dilutive securities: unvested share awards		43		37		33		28
Weighted average common shares for diluted earnings per share		235,592		199,867		228,534		193,990