GOODWILL AND INTANGIBLE ASSETS - Other Intangibles (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Intangible Assets, Net
Intangible Assets	$ 158.6	$ 161.0
Accumulated Amortization	(86.8)	(80.4)
Intangible Assets, net	71.8	80.6
Foreign currency translation adjustment	0.1	0.0
Foreign currency translation adjustment, Intangible asset, net	0.1	0.0
Amortization of intangible assets	6.4	6.9	$ 6.9
Goodwill impairment charges	13.3	5.7	0.0
Goodwill, Impaired, Accumulated Impairment Loss	137.8	124.5
Impairment charges			$ 0.0
Trade names
Intangible Assets, Net
Intangible Assets	45.5	48.4
Accumulated Amortization	0.0	0.0
Intangible Assets, net	45.5	48.4
Impairment charges	1.4	3.5
Non-competition agreements
Intangible Assets, Net
Intangible Assets	22.2	21.3
Accumulated Amortization	(21.7)	(21.2)
Intangible Assets, net	$ 0.5	0.1
Weighted average remaining useful lives	10 months 24 days
Future estimated amortization expense
2024	$ 0.5
2025	0.0
2026	0.0
2027	0.0
2028	0.0
Thereafter	0.0
Total	0.5
Customer relationships
Intangible Assets, Net
Intangible Assets	89.8	90.3
Accumulated Amortization	(65.1)	(59.2)
Intangible Assets, net	$ 24.7	31.1
Weighted average remaining useful lives	8 years
Impairment charges	$ 0.4	$ 0.2
Future estimated amortization expense
2024	4.0
2025	3.2
2026	2.8
2027	2.8
2028	2.7
Thereafter	9.2
Total	$ 24.7
Non competition agreements and customer relationships and trade names
Intangible Assets, Net
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]	Goodwill and Intangible Asset Impairment	Goodwill and Intangible Asset Impairment
Impairment charges	$ 1.8	$ 3.7
Licenses
Intangible Assets, Net
Intangible Assets	1.0	1.0
Accumulated Amortization	0.0	0.0
Intangible Assets, net	1.0	1.0
Flatbed Solution segment
Intangible Assets, Net
Goodwill impairment charges	0.0	0.0
Goodwill, Impaired, Accumulated Impairment Loss	42.2	42.2
Flatbed Solution segment | Trade names
Intangible Assets, Net
Impairment charges	1.5
Specialized Solutions Segment
Intangible Assets, Net
Goodwill impairment charges	13.3	5.7
Goodwill, Impaired, Accumulated Impairment Loss	$ 95.6	$ 82.3