Income Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Summary of Basic and Diluted Earnings per Share

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

	Year Ended December 31,
	2015		2014		2013
Net income available to common stockholders	$	217,266	$	132,718	$	271,583
Weighted average shares outstanding—basic	138,247,606		133,369,047		127,941,134
Potentially dilutive common shares:
Stock options	20,424		30,434		61,375
Unvested incentive units	95,746		90,449		125,132
Market performance-based awards	501,645		147,305		—
Weighted average shares outstanding—diluted	138,865,421		133,637,235		128,127,641
Income per share:
Basic	$	1.57	$	1.00	$	2.12
Diluted	$	1.56	$	0.99	$	2.12

Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share

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

	Year Ended December 31,
	2015	2014	2013
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,658,291	2,753,614	2,521,400
Potentially dilutive 2029 Debentures	—	1,957,963	6,649,510
Potentially dilutive Series D Cumulative Convertible    Preferred Stock	—	—	470,748
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,301,438	4,956,175	5,176,886
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,727,962	3,143,195	3,283,169
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,730,042	4,297,805	3,898,376
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,465,987	4,320,495	—
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	1,235,063	—	—
	20,118,783	21,429,247	22,000,089