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Accounts Payable and Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2016
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses

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

 

     March 31, 2016      December 31, 2015  

Accounts payable

   $ 30,637       $ 21,969   

Accrued salaries and bonuses

     93,015         233,499   

Accrued payroll taxes and benefits

     43,699         58,979   

Accrued professional liabilities

     27,488         25,995   

Accrued contingent consideration

     13,484         13,565   

Accrued uncertain tax positions

     7,000         7,000   

Other accrued expenses

     45,047         34,800   
  

 

 

    

 

 

 
   $ 260,370       $ 395,807