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Earnings Per Common Share
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Earnings Per Common Share
Earnings Per Common Share
Basic net income (loss) per share (“EPS”) is calculated by dividing net income (loss) attributable to common stockholders by the weighted average shares outstanding during the period. Diluted EPS is calculated by adjusting weighted average shares outstanding for the dilutive effect of potential common shares, determined using the treasury-stock method. For purposes of the diluted EPS calculation, stock options, restricted stock and restricted stock unit awards are considered to be potential common shares. During periods of net loss, no effect is given to potential common shares as they are anti-dilutive. Performance-based restricted stock units are not included in the calculation of diluted EPS until they are contingently issuable.
The basic and diluted EPS calculations for the years ended December 31, 2016, 2015 and 2014 are presented below:
 
 
Year Ended December 31,
(in thousands, except per share amounts)
 
2016
 
2015
 
2014
Income (loss) attributable to common stockholders
 
$
30,880

 
$
(4,831
)
 
$
94,032

 
 
 
 
 
 
 
Weighted average common shares outstanding, basic
 
66,055

 
41,260

 
38,828

Effect of dilutive securities:
 
 
 
 
 
 
Restricted stock
 
207

 
—

 
463

Restricted stock units
 
129

 
—

 
—

Stock options
 
218

 
—

 
—

Weighted average common shares outstanding, diluted
 
66,609

 
41,260

 
39,291

 
 
 
 
 
 
 
Basic income (loss) per common share
 
$
0.47

 
$
(0.12
)
 
$
2.42

Diluted income (loss) per common share
 
$
0.46

 
$
(0.12
)
 
$
2.39



The following table provides the securities that could potentially dilute EPS in the future, but were not included in the computation of diluted EPS because to do so would have been anti-dilutive. The amounts included in this table exclude performance-based restricted stock units. The number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 206,250.
 
 
Year Ended December 31,
(in thousands)
 
2016
 
2015
 
2014
Stock options
 
469

 
1,228

 
—

Restricted stock
 
—

 
455

 
—

Restricted stock units
 
5

 
282

 
—