INCOME TAXES - Schedule of Difference in Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory rate		35.00%	35.00%	35.00%
Tax at statutory rate		$ (12,968)	$ (2,228)	$ (3,650)
State income taxes, net of federal benefit		(1,959)	(265)	198
Decrease in net federal deferred tax assets before valuation allowance change due to federal rate change		33,700	0	0
Decrease in valuation allowance by 80% of indefinite lived deferred liabilities due to US tax reform	$ (12,758)	(12,758)	0	0
Other changes in valuation allowance, including due to federal rate change		(18,848)	4,370	5,272
Deductible stock awards		(1,825)	0	0
Tax credits		(1,000)	(1,085)	(671)
Non-deductible expenses		542	100	467
Non-deductible equity income in subsidiaries		0	0	(415)
Other, net		(137)	(398)	150
(Benefit) provision for income taxes		$ (15,253)	$ 494	$ 1,351