ACCUMULATED OTHER COMPREHENSIVE LOSS - Related Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	$ 1,959	$ 5,673
Tax provision attributable to other comprehensive income	(448)	(1,151)
Net Amount	1,511	4,522
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	2,108	6,226
Tax provision attributable to other comprehensive income	(508)	(1,363)
Net Amount	1,600	4,863
Foreign currency hedge
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	(166)	(553)
Tax provision attributable to other comprehensive income	63	212
Net Amount	(103)	(341)
Defined benefit pension plans
Accumulated Other Comprehensive Loss [Line Items]
Gross Amount	17	0
Tax provision attributable to other comprehensive income	(3)	0
Net Amount	$ 14	$ 0