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Net Income (Loss) Per Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share
Net Income (Loss) Per Share
The Company’s basic net income (loss) per share amounts have been computed by dividing net income (loss) by the weighted average number of shares of Common Stock and Class A Stock outstanding. Net income (loss) per share is presented on a combined basis, inclusive of Common Stock and Class A Stock outstanding, as each class of stock has equivalent economic rights. Diluted net income per share includes the potential dilutive effect of other securities as if such securities were converted or exercised during the period, when the effect is dilutive. In 2011 and 2010, the Company reported net losses; therefore, no common stock equivalents were included in the computation of diluted net loss per share for these periods, since such inclusion would have been antidilutive. The calculations of basic and diluted net income (loss) per share are as follows:
 
 
December 31,
 
 
2012
 
2011
 
2010
Net income (loss) - basic
 
$
750,269

 
$
(221,760
)
 
$
(104,468
)
Effect of dilutive securities:
 
 
 
 
 
 
Convertible senior notes - interest expense related to contractual coupon interest rate and amortization of discount and note issuance costs
 
29,126

 


 

Net income (loss) - diluted
 
$
779,395

 
$
(221,760
)
 
$
(104,468
)
 
 
 
 
 
 
 
(Shares in thousands)
 
 
 
 
 
 
Weighted average shares - basic
 
94,685

 
90,610

 
82,926

Effect of dilutive securities:
 
 
 
 
 
 
Stock options
 
14,231

 


 


Restricted stock
 
715

 


 


Convertible senior notes
 
4,761

 


 


Warrants
 
990

 


 


Dilutive potential shares
 
20,697

 


 

Weighted average shares - diluted
 
115,382

 
90,610

 
82,926

 
 
 
 
 
 
 
Net income (loss) per share - basic
 
$
7.92

 
$
(2.45
)
 
$
(1.26
)
Net income (loss) per share - diluted
 
$
6.75

 
$
(2.45
)
 
$
(1.26
)


Shares which have been excluded from the December 31, 2012, 2011, and 2010 diluted per share amounts because their effect would have been antidilutive, include the following:
 
 
December 31,
(Shares in thousands)
 
2012
 
2011
 
2010
Stock options
 
325

 
20,942

 
21,428

Restricted stock
 


 
846

 
526

Convertible senior notes
 


 
939

 


Warrants
 
3,771

 
939