STOCKHOLDERS' EQUITY - Summary of Changes in Balances of Each Component of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ (37,862)
Ending balance	(38,817)
Marketable Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	18
Cumulative effect of new accounting principle		$ (18)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	0
Income tax expense related to items of other comprehensive income	0
Other comprehensive income (loss), net of tax	0
Ending balance	0
Interest Rate Swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	166
Cumulative effect of new accounting principle		$ 0
Other comprehensive income (loss) before reclassifications	724
Amounts reclassified from accumulated other comprehensive loss	53
Income tax expense related to items of other comprehensive income	(209)
Other comprehensive income (loss), net of tax	568
Ending balance	$ 734