ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Net income	$ 43,229	$ 35,068	$ 45,394	$ 32,337	$ (369)	$ 9,180	$ 123,691	$ 41,148
Foreign currency translation adjustment	(7,815)			21,181			(13,058)	24,801
Change in unrealized loss on derivatives, net of tax	10,964			(9,679)			40,075	(39,814)
Pension liability adjustment, net of tax	39			(291)			267	(498)
Comprehensive income, net	$ 46,417			$ 43,548			$ 150,975	$ 25,637