ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Changes in accumulated other comprehensive income (loss) [Abstract]
Net foreign currency translation adjustment	$ 781	$ (1,089)
Unrealized loss on cash flow hedge	(3,933)	0
Tax	826	0
Net of tax	(3,107)	0
Net change in postretirement benefit plan (see Note 15 for further information)
Amortization of prior service cost	19	18
Amortization of gain	(13)	(11)
Total before tax	6	7
Tax	(1)	(2)
Adjustment	(584)	0
Net of tax and adjustment	(579)	5
Other comprehensive loss	(2,905)	$ (1,084)
Taxes on net investment hedge	$ 1,174