ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accounts payable	$ 12,251	$ 8,787
Accrued salaries and benefits	42,312	47,614
Accrued expenses - general	28,789	26,426
Income taxes payable	0	308
Total	$ 83,352	$ 83,135