Earnings per share of QTS Realty Trust, Inc. (Tables)

12 Months Ended

Dec. 31, 2017

Earnings per Share [Abstract]

Summary of Basic and Diluted Earnings Per Share

The computation of basic and diluted net income per share is as follows (in thousands, except per share data):

	Year Ended
	December 31,
	2017		2016		2015
Numerator:
Net income available to common stockholders - basic	$	1,282	$	21,525	$	20,326
Effect of net income attributable to noncontrolling interests and income allocated to participating securities		(593)		3,160		3,803
Net income available to common stockholders	$	689	$	24,685	$	24,129
Denominator:
Weighted average shares outstanding - basic		48,381		46,206		37,568
Effect of Class A and Class RS partnership units *		6,696		6,783		7,029
Effect of Class O units and options to purchase Class A common stock and restricted Class A common stock on an "as if" converted basis *		779		973		756
Weighted average shares outstanding - diluted		55,856		53,962		45,353
Basic net income per share	$	0.01	$	0.47	$	0.54
Diluted net income per share	$	0.01	$	0.46	$	0.53

* The Class A units and Class O units represent limited partnership interests in the Operating Partnership, and are described in more detail in Note 8