FAIR VALUE OF FINANCIAL INSTRUMENTS - Non-Recurring Fair Value Measurements (Details) - USD ($)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, impairment loss		$ 537,400,000	$ 0	$ 537,353,000
Goodwill, impairment loss, net of tax		519,600,000
Impairment charge			$ 4,143,000	$ 0
Impairment charge related to ROU asset impairment		6,000,000.0
Impairment of property and equipment		2,200,000
Licensing Agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge	$ 4,100,000	$ 0
Impairment charges, net of tax	$ 3,000,000.0