STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (24,550)	$ (21,597)	$ (12,020)
Other comprehensive income (loss) before reclassifications	(169)
Amounts reclassified from accumulated other comprehensive income (loss)	421
Other comprehensive income (loss), net of taxes	252	(75)	(51)
Ending balance	(37,862)	(24,550)	(21,597)
Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(68)	7	58
Other comprehensive income (loss) before reclassifications	86
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss), net of taxes	86	(75)	(51)
Ending balance	18	(68)	7
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	0	0
Other comprehensive income (loss) before reclassifications	(255)
Amounts reclassified from accumulated other comprehensive income (loss)	421
Other comprehensive income (loss), net of taxes	166	0	0
Ending balance	166	0	0
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(68)	7	58
Other comprehensive income (loss), net of taxes	252	(75)	(51)
Ending balance	$ 184	$ (68)	$ 7