Income per Share (Tables)

12 Months Ended

Dec. 31, 2017

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,
	2017		2016		2015
Net income available to common stockholders	$	173,148	$	332,088	$	217,266
Weighted average shares outstanding—basic	174,059,386		149,953,662		138,247,606
Potentially dilutive common shares:
Stock options	—		9,726		20,424
Unvested incentive units	141,136		71,031		95,746
Forward equity offering	124,527		3,990		—
Market performance-based awards	570,049		641,279		501,645
Weighted average shares outstanding—diluted	174,895,098		150,679,688		138,865,421
Income per share:
Basic	$	0.99	$	2.21	$	1.57
Diluted	$	0.99	$	2.20	$	1.56

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,
	2017	2016	2015
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	3,996,550	2,406,018	2,658,291
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock	540,773	—	—
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	—	2,880,254	4,301,438
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	463,301	1,939,905	2,727,962
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,261,153	2,652,503	3,730,042
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	3,313,484	3,886,966	5,465,987
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,263,799	2,655,607	1,235,063
Potentially dilutive Series J Cumulative Redeemable Preferred Stock	720,803	—	—
	13,559,863	16,421,253	20,118,783