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STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (37,862)	$ (24,550)	$ (21,597)
Cumulative effect of new accounting principle				$ (18)
Other comprehensive income (loss) before reclassifications	(1,837)	(84)
Amounts reclassified from accumulated other comprehensive income (loss)	363	421
Income tax expense related to items in other comprehensive income (loss)	0	(85)	0
Other comprehensive (loss) income, net of tax	(1,474)	252	(75)
Ending balance	(15,832)	(37,862)	(24,550)
Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	18	(68)	7
Cumulative effect of new accounting principle				(18)
Other comprehensive income (loss) before reclassifications	0	59
Amounts reclassified from accumulated other comprehensive income (loss)		0
Income tax expense related to items in other comprehensive income (loss)	0	27
Other comprehensive (loss) income, net of tax	0	86	(75)
Ending balance	0	18	(68)
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	166	0	0
Cumulative effect of new accounting principle				0
Other comprehensive income (loss) before reclassifications	(1,837)	(143)
Amounts reclassified from accumulated other comprehensive income (loss)	363	421
Income tax expense related to items in other comprehensive income (loss)	0	(112)
Other comprehensive (loss) income, net of tax	(1,474)	166	0
Ending balance	(1,308)	166	0
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	184	(68)	7
Cumulative effect of new accounting principle				$ (18)
Other comprehensive (loss) income, net of tax	(1,474)	252	(75)
Ending balance	$ (1,308)	$ 184	$ (68)

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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