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Net Income (Loss) Per Common Share
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Net Income (Loss) Per Common Share
Net Income (Loss) Per Common Share
 
Basic net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period. For more information about common share activity during the period, see Note 11, Stockholders' Equity. Diluted net income per common share is computed by dividing net income by the combination of other potentially dilutive weighted average common shares and the weighted average number of common shares outstanding during the period. Other potentially dilutive weighted average common shares include the dilutive effect of stock options, restricted stock units (RSUs), and performance stock units (PSUs) for each period using the treasury stock method. Under the treasury stock method, the exercise price of a share, the amount of compensation expense, if any, for future service that has not yet been recognized, and the amount of tax benefits that would be recorded in additional paid-in-capital, if any, when the share is exercised are assumed to be used to repurchase shares in the current period.

The following table sets forth the computation of basic and diluted net income (loss) per common share:
 
Year Ended December 31
 
2013
 
2012
 
2011
 
(thousands, except per-share data)
Net income (loss)
$
116,936

 
$
41,496

 
$
(46,363
)
Weighted average common shares outstanding during the period (for basic calculation)
40,203

 
29,700

 
29,700

Dilutive effect of other potential common shares
23

 
—

 
—

Weighted average common shares and potential common shares (for diluted calculation)
40,226

 
29,700

 
29,700

 
 
 
 
 
 
Net income (loss) per common share - Basic
$
2.91

 
$
1.40

 
$
(1.56
)
Net income (loss) per common share - Diluted
$
2.91

 
$
1.40

 
$
(1.56
)


The computation of the dilutive effect of other potential common shares excluded options representing 0.1 million shares of common stock in the year ended December 31, 2013, and no shares of common stock in the years ended December 31, 2012 and 2011. Under the treasury stock method, the inclusion of these stock awards would have been antidilutive.