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Earnings (Loss) Per Share
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share
Earnings (Loss) Per Share
The following table sets forth the computation of basic and diluted income (loss) per share:
 
For the Years Ended December 31,
 
2014
 
2013
 
2012
Net income (loss) per share:
 
 
 
 
 
Numerator:
 
 
 
 
 
Net income (loss)
$
26,201

 
$
(33,748
)
 
$
(134,336
)
Denominator:
 
 
 
 
 
Weighted-average common shares outstanding - basic
114,318

 
112,415

 
110,769

Effect of potential dilutive common shares
3,306

 
—

 
—

Weighted-average common shares outstanding - diluted
117,624

 
112,415

 
110,769

Basic net income (loss) per share
$
0.23

 
$
(0.30
)
 
$
(1.21
)
Diluted net income (loss) per share
$
0.22

 
$
(0.30
)
 
$
(1.21
)
For the years ended December 31, 2014, 2013 and 2012, options to purchase approximately 5.6 million, 7.3 million and 12.2 million shares, respectively, were excluded from the calculation because they were anti-dilutive after considering proceeds from exercise, taxes and related unrecognized stock-based compensation expense. For the years ended December 31, 2013 and 2012, an additional, 3.3 million and 6.8 million potentially dilutive shares, respectively, have been excluded from the weighted average dilutive shares because there was a net loss for the periods. These shares do not include the Company’s 5% convertible senior notes due 2014 (the "2014 Notes") and 1.125% convertible senior notes due 2018 (the "2018 Notes"). The par amount of convertible notes is payable in cash equal to the principal amount of the notes plus any accrued and unpaid interest and then the “in-the-money” conversion benefit feature at the conversion price above $19.31 and $12.07, respectively, per share is payable in cash, shares of the Company’s common stock or a combination of both. Refer to Note 11, "Convertible Notes” for more details.