INTANGIBLE ASSETS AND GOODWILL - Schedule of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Beginning balance	$ 704,158
Foreign currency	(6,136)
Ending balance	698,022	$ 704,158
Americas
Goodwill [Line Items]
Beginning balance	507,819
Foreign currency	0
Ending balance	507,819	507,819
Goodwill, cumulative impairment		2,600,000
Europe
Goodwill [Line Items]
Beginning balance	185,641
Foreign currency	(5,123)
Ending balance	180,518	185,641
Goodwill, cumulative impairment		191,400
Other
Goodwill [Line Items]
Beginning balance	10,698
Foreign currency	(1,013)
Ending balance	$ 9,685	10,698
Goodwill, cumulative impairment		$ 80,700