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Accounts Payable and Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Expenses
9.
Accounts Payable and Accrued Expenses:
Accounts payable and accrued expenses consist of the following (in thousands):
 
December 31,
 
 
2019
 
 
2018
 
Accounts payable
  $
39,610
    $
31,059
 
Accrued salaries and bonuses
   
268,619
     
242,888
 
Accrued payroll taxes and benefits
   
67,268
     
78,415
 
Accrued professional liabilities
   
44,869
     
34,931
 
Accrued contingent consideration
   
2,696
     
18,760
 
Accrued interest
   
32,910
     
9,477
 
Other accrued expenses
   
55,894
     
33,037
 
                 
  $
511,866
    $
448,567