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Accounts Payable and Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2018
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

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

 

     September 30, 2018      December 31, 2017  

Accounts payable

   $ 30,709      $ 34,632  

Accrued salaries and bonuses

     194,457        225,429  

Accrued payroll taxes and benefits

     78,211        75,672  

Accrued professional liabilities

     33,468        37,912  

Accrued contingent consideration

     21,430        6,259  

Accrued interest

     15,418        4,495  

Other accrued expenses

     40,046        53,618  
  

 

 

    

 

 

 
     $413,739      $438,017