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Accounts Payable and Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2017
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

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

 

     September 30, 2017      December 31, 2016  

Accounts payable

   $ 27,339      $ 28,474  

Accrued salaries and bonuses

     191,470        220,635  

Accrued payroll taxes and benefits

     73,455        67,830  

Accrued professional liabilities

     37,325        28,972  

Accrued contingent consideration

     6,276        6,566  

Accrued interest

     14,244        4,511  

Other accrued expenses

     52,200        50,950  
  

 

 

    

 

 

 
   $ 402,309      $ 407,938