ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity [Abstract]
Net income (loss)	$ 35,068	$ 45,394	$ (369)	$ 9,180	$ 80,462	$ 8,811
Foreign currency translation adjustment	1,558		10,433		(5,243)	3,620
Change in unrealized loss on derivatives, net of tax	(7,804)		(8,830)		29,111	(30,136)
Pension liability adjustment, net of tax	(91)		(139)		228	(207)
Comprehensive income (loss), net	$ 28,731		$ 1,095		$ 104,558	$ (17,912)