GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill
Balance at the beginning of the period	$ 139.9	$ 258.4
Impairment		(118.8)	$ (11.1)
Adjustments to previously recorded goodwill, net		(0.3)
Foreign currency translation adjustment	0.2	0.6
Balance at the end of the period	140.1	139.9	258.4
Flatbed
Goodwill
Balance at the beginning of the period	59.3	101.5
Impairment		(42.2)
Balance at the end of the period	59.3	59.3	101.5
Specialized
Goodwill
Balance at the beginning of the period	80.6	156.9
Impairment		(76.6)
Adjustments to previously recorded goodwill, net		(0.3)
Foreign currency translation adjustment	0.2	0.6
Balance at the end of the period	$ 80.8	$ 80.6	$ 156.9