ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued tax liabilities	$ 32,617	$ 5,456
Accrued compensation	17,725	12,892
Accrued marketing	3,458	4,633
Other accrued expenses	19,865	13,749
Total accrued liabilities	$ 73,665	$ 36,730