ACCRUED EXPENSES - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Outside professional services expenses	$ 8,815	$ 10,367
Income and other taxes	7,954	10,387
Marketing and sales program expenses	8,318	5,860
Dividends payable	2,367	2,363
Employee-related expenses	5,432	3,536
Other	8,061	12,993
Total accrued expenses	$ 40,947	$ 45,506