ACCUMULATED OTHER COMPREHENSIVE LOSS - Related Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	$ (2,398)	$ 613	$ 178	$ (3,955)
Tax (provision) benefit attributable to other comprehensive income (loss)	(148)	202	112	992
Net Amount	$ (2,546)	$ 815	290	(2,963)
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount			(473)	(4,419)
Tax (provision) benefit attributable to other comprehensive income (loss)			273	1,108
Net Amount			(200)	(3,311)
Foreign Currency Hedge
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount			651	464
Tax (provision) benefit attributable to other comprehensive income (loss)			(161)	(116)
Net Amount			$ 490	$ 348