REPORTABLE SEGMENTS (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	$ 391.0	$ 433.0
Operating income (loss)	(8.3)	0.7
Depreciation	24.5	37.2
Amortization of intangible assets	1.8	4.3
Impairment	13.4
Restructuring	0.5
Non-cash operating lease expense	2.9	6.6
Interest expense	12.0	12.7
Income (loss) before income tax	(21.2)	(11.2)
Total assets	1,138.1	1,499.8	$ 1,140.6
Cash capital expenditures	14.3	29.0
Company freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	180.9	206.2
Owner operator freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	107.8	111.0
Brokerage
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	61.7	71.4
Logistics
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	10.1	12.4
Fuel surcharge
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	30.5	32.0
Corporate/Eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	(4.6)	(4.6)
Operating income (loss)	(10.4)	(10.4)
Depreciation	0.3	0.1
Non-cash operating lease expense		0.1
Interest expense	6.4	6.8
Income (loss) before income tax	(16.6)	(17.1)
Total assets	126.5	66.6
Cash capital expenditures		0.6
Corporate/Eliminations \| Company freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	(2.6)	(2.9)
Corporate/Eliminations \| Owner operator freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	(1.1)	(1.3)
Corporate/Eliminations \| Brokerage
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	(0.7)
Corporate/Eliminations \| Logistics
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	0.2
Corporate/Eliminations \| Fuel surcharge
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	(0.4)	(0.4)
Flatbed
Segment Reporting Information, Profit (Loss) [Abstract]
Intersegment revenues and expenses	1.7	2.4
Insurance costs included in the corporate segment		0.8
Flatbed \| Consolidated
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	155.2	167.9
Operating income (loss)	8.6	3.3
Depreciation	8.3	13.0
Amortization of intangible assets	0.8	1.7
Non-cash operating lease expense	0.9	2.4
Interest expense	2.5	2.6
Income (loss) before income tax	6.1	0.9
Total assets	350.9	497.7
Cash capital expenditures	7.8	14.7
Flatbed \| Consolidated \| Company freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	51.4	55.2
Flatbed \| Consolidated \| Owner operator freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	66.1	68.5
Flatbed \| Consolidated \| Brokerage
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	19.6	25.3
Flatbed \| Consolidated \| Logistics
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	0.8	0.7
Flatbed \| Consolidated \| Fuel surcharge
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	17.3	18.2
Specialized
Segment Reporting Information, Profit (Loss) [Abstract]
Intersegment revenues and expenses	2.7	2.5
Insurance costs included in the corporate segment		1.0
Specialized \| Consolidated
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	240.4	269.7
Operating income (loss)	(6.5)	7.8
Depreciation	15.9	24.1
Amortization of intangible assets	1.0	2.6
Impairment	13.4
Restructuring	0.5
Non-cash operating lease expense	2.0	4.1
Interest expense	3.1	3.3
Income (loss) before income tax	(10.7)	5.0
Total assets	660.7	935.5
Cash capital expenditures	6.5	13.7
Specialized \| Consolidated \| Company freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	132.1	153.9
Specialized \| Consolidated \| Owner operator freight
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	42.8	43.8
Specialized \| Consolidated \| Brokerage
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	42.8	46.1
Specialized \| Consolidated \| Logistics
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	9.1	11.7
Specialized \| Consolidated \| Fuel surcharge
Segment Reporting Information, Profit (Loss) [Abstract]
Total revenue	$ 13.6	$ 14.2

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