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Net Loss Per Share
 9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
A reconciliation of the basic and diluted net loss per share computations for the three and nine months ended September 30, 2014 and 2013 is as follows (in thousands, except per share data):

 
For the three months ended  
 September 30,
 
2014
 
2013
 
Basic
 
Diluted
 
Basic
 
Diluted
Numerator:
 

 
 

 
 

 
 

Net loss
$
(98,902
)
 
$
(98,902
)
 
$
(100,724
)
 
$
(100,724
)
Denominator:
 

 
 

 
 

 
 

Average number of common shares outstanding(1)
66,952

 
66,952

 
62,573

 
62,573

Net loss per share
$
(1.48
)
 
$
(1.48
)
 
$
(1.61
)
 
$
(1.61
)
 


 
For the nine months ended September 30,
 
2014
 
2013
 
Basic
 
Diluted
 
Basic
 
Diluted
Numerator:
 

 
 

 
 

 
 

Net loss
$
(342,471
)
 
$
(342,471
)
 
$
(184,660
)
 
$
(184,660
)
Denominator:
 

 
 

 
 

 
 

Average number of common shares outstanding(1)
64,986

 
64,986

 
62,555

 
62,555

Net loss per share
$
(5.27
)
 
$
(5.27
)
 
$
(2.95
)
 
$
(2.95
)
_______________________________________________________________________________

(1)
In periods of net loss, the number of shares used to calculate diluted earnings per share is the same as basic earnings per share; therefore, the effect of dilutive securities is zero for such periods. The weighted average number of stock options and restricted stock units outstanding for the three months ended September 30, 2014 and 2013 totaling 1,727 and 675, respectively, were excluded from the calculation above because their effect would have been anti-dilutive. Additionally, the weighted average number of stock options and restricted stock units outstanding for the nine months ended September 30, 2014 and 2013 totaling 1,437 and 525, respectively, were excluded from the calculation above because their effect would have been anti-dilutive.
The tables below sets forth stock options exercised and restricted stock units vested for the three and nine months ended September 30, 2014 and 2013:
 
For the three months ended  
 September 30,
 
For the nine months ended  
 September 30,
 
2014
 
2013
 
2014
 
2013
Stock options exercised
—

 
—

 
18,300

 
24,831

Restricted stock units vested
3,337

 
4,558

 
81,889

 
30,234

Total
3,337

 
4,558

 
100,189

 
55,065