INTEGRATION AND RESTRUCTURING (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1.5	$ 6.9		$ 8.4
Restructuring Reserve [Roll Forward]
Costs accrued				8.4
Consolidated
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1.8			1.8	$ 1.8
Restructuring Reserve [Roll Forward]
Costs accrued				8.4
Amounts paid or charged				(6.6)
Balance at end of the period	1.8			1.8
Consolidated | Severance and Other Payroll
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1.8			1.8	1.8
Restructuring Reserve [Roll Forward]
Costs accrued				4.1
Amounts paid or charged				(2.3)
Balance at end of the period	1.8			1.8
Consolidated | Operating Lease Termination
Restructuring Reserve [Roll Forward]
Costs accrued				0.5
Amounts paid or charged				(0.5)
Consolidated | Fixed Asset Impairment
Restructuring Reserve [Roll Forward]
Costs accrued				2.1
Amounts paid or charged				(2.1)
Consolidated | Other
Restructuring Reserve [Roll Forward]
Costs accrued				1.7
Amounts paid or charged				(1.7)
Specialized | Consolidated
Restructuring Cost and Reserve [Line Items]
Restructuring charges				3.9
Restructuring Reserve [Roll Forward]
Costs accrued				3.9
Amounts paid or charged				(3.9)
Specialized | Consolidated | Severance and Other Payroll
Restructuring Reserve [Roll Forward]
Costs accrued				0.6
Amounts paid or charged				(0.6)
Specialized | Consolidated | Operating Lease Termination
Restructuring Reserve [Roll Forward]
Costs accrued				0.5
Amounts paid or charged				(0.5)
Specialized | Consolidated | Fixed Asset Impairment
Restructuring Reserve [Roll Forward]
Costs accrued				1.4
Amounts paid or charged				(1.4)
Specialized | Consolidated | Other
Restructuring Reserve [Roll Forward]
Costs accrued				1.4
Amounts paid or charged				(1.4)
Flatbed | Consolidated
Restructuring Cost and Reserve [Line Items]
Restructuring charges				1.7
Restructuring Reserve [Roll Forward]
Costs accrued				1.8
Amounts paid or charged				(1.8)
Flatbed | Consolidated | Severance and Other Payroll
Restructuring Reserve [Roll Forward]
Costs accrued				0.8
Amounts paid or charged				(0.8)
Flatbed | Consolidated | Fixed Asset Impairment
Restructuring Reserve [Roll Forward]
Costs accrued				0.7
Amounts paid or charged				(0.7)
Flatbed | Consolidated | Other
Restructuring Reserve [Roll Forward]
Costs accrued				0.3
Amounts paid or charged				(0.3)
Corporate | Consolidated
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1.8			1.8	1.8
Restructuring Reserve [Roll Forward]
Costs accrued				2.7
Amounts paid or charged				(0.9)
Balance at end of the period	1.8			1.8
Corporate | Consolidated | Severance and Other Payroll
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1.8			1.8	1.8
Restructuring Reserve [Roll Forward]
Costs accrued				2.7
Amounts paid or charged				(0.9)
Balance at end of the period	$ 1.8			$ 1.8
Plan And Project Pivot [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		8.4	$ 8.4
Restructuring and Related Cost, Cost Incurred to Date		$ 6.9	$ 6.9		$ 1.5