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Accounts Payable and Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2015
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

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

 

     December 31,  
     2015      2014  

Accounts payable

   $ 21,969       $ 32,783   

Accrued salaries and bonuses

     233,499         231,390   

Accrued payroll taxes and benefits

     58,979         49,858   

Accrued professional liability

     25,995         19,718   

Accrued contingent consideration

     13,565         17,010   

Accrual for uncertain tax positions

     7,000         —     

Other accrued expenses

     34,800         29,899   
  

 

 

    

 

 

 
   $ 395,807       $ 380,658