Common Stock and Equity (Tables)
12 Months Ended
Dec. 31, 2013
Equity [Abstract]  
Reserved Common Stock for Stock Options and Restricted Stock Units

Common Stock Reserved — As of December 31, 2012 and 2013, the Company has reserved the following number of shares of common stock for the exercise of stock options and restricted stock units (in thousands):

 

     Number of Shares as of  
     December 31,
2012
     December 31,
2013
 

Common stock options and restricted stock units

     4,908         5,231   
  

 

 

    

 

 

 

Total reserved

     4,908         5,231