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Accounts Receivable (Tables)
9 Months Ended
Sep. 30, 2015
Schedule of Accounts Receivable

Accounts receivable (in thousands) consisted of the following, as of:

 

     September 30,
2015
     December 31,
2014
 

Billed and billable

   $ 115,389       $ 187,470   

Less: unpaid deferred revenue

     (56,599      (104,425
  

 

 

    

 

 

 

Accounts receivable, gross

     58,790         83,045   

Less: allowance for doubtful accounts

     (3,751      (4,412
  

 

 

    

 

 

 

Accounts receivable, net

   $ 55,039       $ 78,633