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Accounts Payable and Accrued Expenses (Tables)
6 Months Ended
Jun. 30, 2015
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses consist of the following (in thousands):

 

     June 30, 2015      December 31, 2014  

Accounts payable

   $ 25,191       $ 32,783   

Accrued salaries and bonuses

     141,633         231,390   

Accrued payroll taxes and benefits

     49,236         49,858   

Accrued professional liabilities

     25,943         19,718   

Accrued contingent consideration

     15,789         17,010   

Other accrued expenses

     28,927         29,899   
  

 

 

    

 

 

 
   $ 286,719       $ 380,658