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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
Accounts payable and accrued expenses were comprised of the following (in thousands):
 
 
December 31,
 
2019
 
2018
Accounts payable
$
64,300

 
$
68,040

Accrued expenses
83,853

 
60,958

Accrued salary and benefits
42,003

 
37,167

Accrued professional fees
17,429

 
14,863

Total
$
207,585

 
$
181,028