RELATED PERSON TRANSACTIONS - Equity Method Investees (Details) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2019 renewal	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
YES Network
Related Party Transaction [Line Items]
Number of renewal terms | renewal	2
Renewal period	2 years
Management service fee		$ 1.0	$ 0.4	$ 4.0	$ 0.4
Mobile Trucks
Related Party Transaction [Line Items]
Amount paid		$ 7.0	$ 4.0	$ 16.0	$ 4.0