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Net Income (Loss) Per Share
 9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
NET INCOME (LOSS) PER SHARE
NET INCOME (LOSS) PER SHARE
Basic net income (loss) per share is computed by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted into common stock.
For the three and nine months ended September 30, 2015 and 2014, 3,302,701 and 1,387,957 shares and 3,251,347 and 2,008,749, respectively, of common stock equivalents related to equity-based awards were not included in the diluted per share calculation as the shares would be antidilutive.
The 3.25% Convertible Senior Notes were not included in the computation of diluted net income (loss) per share for the three and nine months ended September 30, 2015 and 2014 because there is no excess value upon conversion over the principal amount of the Notes.
 
Three months ended September 30,
 
Nine months ended September 30,
In thousands except per share amounts
2015
 
2014
 
2015
 
2014
Net income (loss) available to common stockholders
$
(14,219
)
 
$
3,466

 
$
(64,185
)
 
$
(76,846
)
Weighted average shares:
 
 
 
 
 
 
 
Basic
135,247

 
102,470

 
124,478

 
102,427

Effect of stock-based compensation plans
—

 
91

 
—

 
—

Diluted
135,247

 
102,561

 
124,478

 
102,427

Income (loss) per share:
 
 
 
 
 
 
 
Basic
$
(0.11
)
 
$
0.03

 
$
(0.52
)
 
$
(0.75
)
Diluted
$
(0.11
)
 
$
0.03

 
$
(0.52
)
 
$
(0.75
)