INTANGIBLE ASSETS, NET - Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
2018	$ 2,415
2019	1,958
2020	841
Net Book Value	5,214
Internal use capitalized software
Finite-Lived Intangible Assets [Line Items]
Amortization of internal use capitalized software	1,900	$ 1,300	$ 1,100
Net Book Value	$ 5,214	$ 3,588