ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
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