INCOME TAXES - Schedule of Reconciliation of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of period	$ 3,107	$ 3,379
Gross increases for tax positions of prior years	1	0
Gross decreases for tax positions of prior years	(1,165)	(2)
Reductions resulting from lapse of statute of limitations	0	(270)
Settlements	(2)	0
Unrecognized tax benefits at end of period	$ 1,941	$ 3,107