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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2014
Receivables [Abstract]  
Schedule of Accounts Receivable
     As of December 31,  
     2013      2014      2014  
     RMB      RMB      US$  
     (In thousands)  

Accounts receivable

     2,264,660         3,758,324         605,732   

Allowance for doubtful accounts

     (43,814      (93,877      (15,130
  

 

 

    

 

 

    

 

 

 
  2,220,846      3,664,447      590,602   
  

 

 

    

 

 

    

 

 

 
Movements in Allowance for Doubtful Accounts Balance

The movements in the allowance for doubtful accounts were as follows:

 

     2012      2013      2014      2014  
     RMB      RMB      RMB      US$  
     (In thousands)  

Balance as of January 1

     5,806         5,768         43,814         7,062   

Amounts (credited against) charged to expenses

     (38      38,046         50,063         8,068   
  

 

 

    

 

 

    

 

 

    

 

 

 

Balance as of December 31

  5,768      43,814      93,877      15,130