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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2019
Indefinite-lived Intangible Assets [Line Items]
Goodwill, impairment loss	$ 0	$ 537,400,000	$ 537,353,000
Goodwill, impairment loss, net of tax		519,600,000
Licensing Agreements
Indefinite-lived Intangible Assets [Line Items]
Impairment charge		0
Goodwill
Indefinite-lived Intangible Assets [Line Items]
Goodwill, impairment loss		537,400,000
Goodwill, impairment loss, net of tax		$ 519,600,000