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Accounts Payable and Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2018
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

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

 

     March 31, 2018      December 31, 2017  

Accounts payable

   $ 31,658      $ 34,632  

Accrued salaries and bonuses

     108,521        225,429  

Accrued payroll taxes and benefits

     56,832        75,672  

Accrued professional liabilities

     37,542        37,912  

Accrued contingent consideration

     8,461        6,259  

Accrued interest

     14,923        4,495  

Other accrued expenses

     44,628        53,618  
  

 

 

    

 

 

 
   $ 302,565      $ 438,017