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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Significant Accounting Policies [Abstract]  
Reconciliation of weighted average number of shares of common stock outstanding
                         
    During the Year Ended December 31,  
    2012     2011     2010  

Numerator:

                        

Net income attributable to TripAdvisor, Inc.

   $ 194,069     $ 177,677     $ 138,776  

Denominator:

                        

Weighted average shares used to compute Basic EPS

     139,462       133,461       133,461  

Effect of dilutive securities:

                        

Stock options

     1,207       1,164       —    

RSUs

     161       240       —    

Stock warrants

     511       —         —    
   

 

 

    

 

 

    

 

 

  

Weighted average shares used to compute Diluted EPS

     141,341       134,865       133,461  
   

 

 

    

 

 

    

 

 

  

Basic EPS

   $ 1.39     $ 1.33     $ 1.04  

Diluted EPS

   $ 1.37     $ 1.32     $ 1.04  
Calculation of diluted net income per share related to stock options and RSUs
                         
    During the Year Ended December 31,  
    2012(1)(2)     2011(2)     2010  

Stock options

     3,944       2,261       —    

RSUs

     21       80       —    

Warrants

     —         8,047       —    
   

 

 

    

 

 

    

 

 

  

Total

     3,965       10,388       —    
   

 

 

    

 

 

    

 

 

  

 

(1) These totals do not include performance based options representing the right to acquire 110,000 shares of common stock, respectively, for which all targets required to trigger vesting have not been achieved; therefore, such awards were excluded from the calculation of weighted average shares used to compute diluted earnings per share for those reporting periods.
(2)

These totals do not include performance based RSUs representing the right to acquire 200,000 and 400,000 shares of common stock at December 31, 2012 and 2011, respectively, for which all targets required to trigger vesting have not been achieved; therefore, such awards were excluded from the calculation of weighted average shares used to compute diluted earnings per share for those reporting periods.