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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	$ 3,386	$ (1,282)	$ 8,861	$ 1,525
Tax (provision) benefit attributable to other comprehensive income (loss)	$ (1,065)	$ 287	(2,295)	(1,031)
Net Amount			6,566	494
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount			10,406	1,872
Tax (provision) benefit attributable to other comprehensive income (loss)			(2,894)	(1,147)
Net Amount			7,512	725
Foreign currency hedge
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount			(1,598)	(347)
Tax (provision) benefit attributable to other comprehensive income (loss)			610	116
Net Amount			(988)	(231)
Defined benefit pension plans
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount			53	0
Tax (provision) benefit attributable to other comprehensive income (loss)			(11)	0
Net Amount			$ 42	$ 0