FAIR VALUE MEASUREMENTS - Schedule of Financial Assets Measured At Fair Value On A Nonrecurring Basis (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Assets:
Intangible assets, excluding goodwill	$ 0	$ (2,020)	$ (7,811)	$ (65,771)
Total	$ (42,155)	$ (8,412)	(50,393)	$ (106,197)
Fair value, measurements, nonrecurring
Assets:
Intangible assets, excluding goodwill			(7,811)
Certain property, plant and equipment			(427)
Total			$ (8,238)
Fair value, measurements, nonrecurring | Discount rate | Minimum
Assets:
Discount rate applied	0.100		0.100
Fair value, measurements, nonrecurring | Discount rate | Maximum
Assets:
Discount rate applied	0.120		0.120
Fair value, measurements, nonrecurring | Discount rate | Weighted average
Assets:
Discount rate applied	0.111		0.111
Level 1 Inputs | Fair value, measurements, nonrecurring
Assets:
Intangible assets, excluding goodwill	$ 0		$ 0
Certain property, plant and equipment	0		0
Total	0		0
Level 2 Inputs | Fair value, measurements, nonrecurring
Assets:
Intangible assets, excluding goodwill	0		0
Certain property, plant and equipment	0		0
Total	0		0
Level 3 Inputs | Fair value, measurements, nonrecurring
Assets:
Intangible assets, excluding goodwill	5,011		5,011
Certain property, plant and equipment	0		0
Total	$ 5,011		$ 5,011