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Earnings Per Common Share
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Income (loss) per common share
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, nonvested stock and restricted stock unit awards are considered to be potential common shares.

The basic and diluted EPS calculations for the years ended December 31, 2015, 2014 and 2013 are presented below:
 
 
Year Ended December 31,
(in thousands, except per share amounts)
 
2015
 
2014
 
2013
(Loss) income attributable to common stockholders
 
$
(4,831
)
 
$
94,032

 
$
21,655

 
 
 
 
 
 
 
Weighted average common shares outstanding, basic
 
41,260

 
38,828

 
38,321

Effect of dilutive securities:
 
 
 
 
 
 
Restricted stock
 
—

 
463

 
544

Weighted average common shares outstanding, diluted
 
41,260

 
39,291

 
38,865

 
 
 
 
 
 
 
Basic (loss) income per share
 
$
(0.12
)
 
$
2.42

 
$
0.57

 
 
 
 
 
 
 
Diluted (loss) income per share
 
$
(0.12
)
 
$
2.39

 
$
0.56



The following table provides the securities that could potentially dilute basic earnings per share in the future, but were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive:
 
 
Year Ended December 31,
(in thousands)
 
2015
 
2014
 
2013
Stock options
 
1,228

 
—

 
—

Restricted stock
 
455

 
—

 
—

Restricted stock units
 
282

 
—

 
—