COMPREHENSIVE INCOME (LOSS) - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Net income (loss)	$ 32,337	$ (369)	$ 9,180	$ (27,610)	$ 29,736	$ 32,756	$ 41,148	$ 34,882
Foreign currency translation adjustment	21,181			(18,651)			24,801	(17,960)
Change in unrealized loss on derivatives, net of tax	(9,679)			(775)			(39,814)	(24,714)
Pension liability adjustment, net of tax	(291)			515			(498)	504
Comprehensive income (loss), net	$ 43,548			$ (46,521)			$ 25,637	$ (7,288)