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Prepaid Expenses And Other Current Assets (Tables)
 3 Months Ended
Mar. 31, 2012
Prepaid Expenses And Other Current Assets [Abstract]  
Schedule Of Prepaids And Other Current Assets
     March 31, 2012      December 31, 2011  

Survey participant incentives and prepaid postage

    $ 2,637       $ 1,770   

Prepaid income taxes

      —           1,984   

Prepaid Scarborough royalty

      2,114         —     

Insurance recovery receivables

      399         993   

Other

      1,366         2,394   
  

 

 

     

 

 

  

Prepaids and other current assets

    $ 6,516       $ 7,141