Income Per Share

3 Months Ended

Mar. 31, 2013

Income Per Share [Abstract]

Income Per Share

7. Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2013	2012
Net income available to common stockholders	$            42,657	$            39,211
Weighted average shares outstanding—basic	126,445,285	107,099,856
Potentially dilutive common shares:
Stock options	70,877	205,830
Class C Units (2007 Grant)	-	16,358
Unvested incentive units	222,177	262,812
Weighted average shares outstanding—diluted	126,738,339	107,584,856
Income per share:
Basic	$                0.34	$                0.37
Diluted	$                0.34	$                0.36

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended March 31,
	2013	2012
Weighted average of Operating Partnership common    units not owned by Digital Realty Trust, Inc.	2,442,756	4,332,966
Potentially dilutive 2029 Debentures	6,590,470	6,442,085
Potentially dilutive Series C Cumulative Convertible    Preferred Stock	-	2,784,845
Potentially dilutive Series D Cumulative Convertible    Preferred Stock	1,909,146	4,337,429
Potentially dilutive Series E Cumulative Redeemable    Preferred Stock	4,381,703	4,025,863
Potentially dilutive Series F Cumulative Redeemable    Preferred Stock	2,778,866	-
	18,102,941	21,923,188