BASIS OF PRESENTATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020
Change in Accounting Estimate [Line Items]
Pre-tax increase in depreciation expense from a change in the Tractor Fleet salvage value percentage	$ 0.3		$ 0.8
Salvage Value
Change in Accounting Estimate [Line Items]
Tractor Fleet previous salvage value (as a percent)		30.00%
Tractor Fleet salvage value (as a percent)		25.00%