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Net Income (Loss) Per Share
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
NET INCOME (LOSS) PER SHARE
NET INCOME (LOSS) PER SHARE
Basic 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 year ended December 31, 2013, 1,111,021 shares of common stock equivalents related to equity-based awards were not included in the diluted per share calculation due to the net loss incurred. For the year ended December 31, 2012, 479,767 shares of common stock equivalents related to equity-based awards were not included in the diluted per share calculation as the shares would be antidilutive. For the year ended December 31, 2011, 1,059,228 shares of common stock equivalents related to convertible debt and 4,258 equity based awards have not been included in the diluted per share calculation as the impact of share conversion would be antidilutive. The 3.25% Convertible Senior Notes were not included in the computation of diluted earnings per share for the years ended December 31, 2013, 2012, and 2011 because there is no excess value upon conversion over the principal amount of the Notes.
 
Year ended December 31,
In thousands except per share amounts
2013
 
2012
 
2011
Net income (loss) available to common stockholders
$
(650,563
)
 
$
48,677

 
$
93,499

Weighted average shares
 
 
 
 
 
Basic
97,864

 
89,437

 
89,383

Effect of share based compensation plans
—

 
166

 
342

Diluted
97,864

 
89,603

 
89,725

Income (loss) per share:
 
 
 
 
 
Basic
$
(6.65
)
 
$
0.54

 
$
1.05

Diluted
$
(6.65
)
 
$
0.54

 
$
1.04