Per Common Share Amounts

9 Months Ended

Sep. 30, 2015

Note 4. Per Common Share Amounts

We calculate basic earnings per common share by dividing net income available for common shareholders by the weighted average number of common shares outstanding during the period. We calculate diluted earnings per share 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 previous terms of our business management agreement with The RMR Group LLC (formerly known as Reit Management & Research LLC), or RMR LLC, 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:


	For the three months ended September 30,		For the nine months ended September 30,
	2015	2014	2015	2014
	(in thousands)
Weighted average common shares for basic earnings per share	151,359	149,665	150,476	149,616
Effect of dilutive securities:
Contingently issuable common shares	-	316	360	189
Unvested share awards	27	26	27	29
Weighted average common shares for diluted earnings per share	151,386	150,007	150,863	149,834