ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued compensation and related	$ 22,114	$ 12,892
Accrued marketing	3,819	4,633
Accrued tax liabilities	3,300	5,456
Other accrued expenses	19,087	13,749
Total accrued liabilities	$ 48,320	$ 36,730