REVENUE EARNING EQUIPMENT Level 3 Fair Value Measurement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue Earning Equipment [Line Items]
Total losses	$ 14,001	$ 25,666	$ 27,572	$ 37,217
Net book value of assets held for sale	42,000		42,000		$ 42,000
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Revenue Earning Equipment [Line Items]
Assets held for sale	62,256		62,256		63,284
Total losses	14,001	25,666
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Trucks
Revenue Earning Equipment [Line Items]
Assets held for sale	37,895		37,895		33,208
Total losses	10,295	10,927	18,896	16,727
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Tractors
Revenue Earning Equipment [Line Items]
Assets held for sale	22,883		22,883		27,976
Total losses	2,101	12,134	5,478	17,317
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Trailers
Revenue Earning Equipment [Line Items]
Assets held for sale	1,478		1,478		$ 2,100
Total losses	$ 1,605	$ 2,605	$ 3,198	$ 3,173