BASIS OF PRESENTATION (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Change in Accounting Estimate [Line Items]
Pre-tax increase in depreciation expense from a change in the Tractor Fleet salvage value percentage	$ 0.4
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%