Income per Unit (Tables)

6 Months Ended

Jun. 30, 2016

Class of Stock [Line Items]

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):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Net income available to common stockholders	$	27,951	$	117,055	$	67,076	$	218,783
Weighted average shares outstanding—basic	146,824,268		135,810,060		146,694,916		135,757,584
Potentially dilutive common shares:
Stock options	11,588		30,601		10,887		31,402
Unvested incentive units	77,946		68,371		70,664		55,742
Forward equity offering	347,277		—		—		—
Market performance-based awards	547,189		589,972		640,467		416,267
Weighted average shares outstanding—diluted	147,808,268		136,499,004		147,416,934		136,260,995
Income per share:
Basic	$	0.19	$	0.86	$	0.46	$	1.61
Diluted	$	0.19	$	0.86	$	0.46	$	1.61

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:

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,402,446	2,757,466	2,442,342	2,730,120
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	2,807,321	4,360,736	3,076,204	4,376,813
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	1,780,397	2,765,569	1,950,922	2,775,765
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,434,401	3,781,463	2,667,567	3,795,404
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	3,567,361	5,541,340	3,909,041	5,561,769
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,437,250	—	2,670,688	—
Shares subject to forward equity offering	—	—	14,375,000	—
	15,429,176	19,206,574	31,091,764	19,239,871

Digital Realty Trust, L.P.

Class of Stock [Line Items]

Summary of Basic and Diluted Earnings Per Share

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Net income available to common unitholders	$	28,408	$	119,432	$	68,196	$	223,186
Weighted average units outstanding—basic	149,226,714		138,567,526		149,137,258		138,487,704
Potentially dilutive common units:
Stock options	11,588		30,601		10,887		31,402
Unvested incentive units	77,946		68,371		70,664		55,742
Forward equity offering	347,277		—		—		—
Market performance-based awards	547,189		589,972		640,467		416,267
Weighted average units outstanding—diluted	150,210,714		139,256,470		149,859,276		138,991,115
Income per unit:
Basic	$	0.19	$	0.86	$	0.46	$	1.61
Diluted	$	0.19	$	0.86	$	0.46	$	1.61

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:

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Potentially dilutive Series E Cumulative Redeemable Preferred Units	2,807,321	4,360,736	3,076,204	4,376,813
Potentially dilutive Series F Cumulative Redeemable Preferred Units	1,780,397	2,765,569	1,950,922	2,775,765
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,434,401	3,781,463	2,667,567	3,795,404
Potentially dilutive Series H Cumulative Redeemable Preferred Units	3,567,361	5,541,340	3,909,041	5,561,769
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,437,250	—	2,670,688	—
Units subject to forward equity offering	—	—	14,375,000	—
	13,026,730	16,449,108	28,649,422	16,509,751