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Earnings per share of QTS Realty Trust, Inc. (Tables)
 12 Months Ended
Dec. 31, 2018
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,

 

    

2018

    

2017

    

2016

Numerator:

 

 

 

 

 

 

 

 

 

Net income (loss)

 

$

(7,175)

 

$

1,457

 

$

24,685

Loss (income) attributable to noncontrolling interests

 

 

2,715

 

 

(175)

 

 

(3,160)

Preferred stock dividends

 

 

(16,666)

 

 

 —

 

 

 —

Earnings attributable to participating securities

 

 
(947)

 

 
(593)

 

 
3,160

Net income (loss) available to common stockholders after allocation of participating securities

 

$

(22,073)

 

$

689

 

$

24,685

Denominator:

 

 

 

 

 

 

 

 

 

Weighted average shares outstanding - basic

 

 

50,433

 

 
48,381

 

 
46,206

Effect of Class A partnership units

 

 

 —

 

 
6,696

 

 
6,783

Effect of Class O units and options to purchase Class A common stock on an "as if" converted basis

 

 

 —

 

 
779

 

 
973

Weighted average shares outstanding - diluted

 

 

50,433

 

 
55,856

 

 
53,962

 

 

 

 

 

 

 

 

 

 

Basic net income (loss) per share

 

$

(0.44)

 

$

0.01

 

$

0.47

 

 

 

 

 

 

 

 

 

 

Diluted net income (loss) per share

 

$

(0.44)

 

$

0.01

 

$

0.46

*

Note:  The table above does not include Class A partnership units of 6.7 million for the year ended December 31, 2018, 0.4 million reflecting the effects of Class O units and options to purchase common stock on an "as if" converted basis for the year ended December 31, 2018, and 3.5 million reflecting the effects of Series B Convertible preferred stock on an “as if” converted basis for the year ended December 31, 2018, as their respective inclusion would have been antidilutive.