GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Beginning balance	$ 325,017	$ 325,491
Impairment loss	(109,486)	0	$ 0
Foreign currency translation	(832)	(474)
Ending balance	214,699	325,017	325,491
North America
Goodwill [Line Items]
Beginning balance	178,685	178,685
Impairment loss	0
Foreign currency translation	0	0
Ending balance	178,685	178,685	178,685
International
Goodwill [Line Items]
Beginning balance	146,332	146,806
Impairment loss	(109,486)
Foreign currency translation	(832)	(474)
Ending balance	$ 36,014	$ 146,332	$ 146,806