REVENUE EARNING EQUIPMENT Level 3 Fair Value Measurement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenue Earning Equipment [Line Items]
Total losses	$ 11,532	$ 9,213	$ 39,104	$ 46,430
Net book value of assets held for sale	50,000		50,000		$ 42,000
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Revenue Earning Equipment [Line Items]
Assets held for sale	67,617		67,617		63,284
Total losses	11,532	9,213	39,104	46,430
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Trucks
Revenue Earning Equipment [Line Items]
Assets held for sale	40,950		40,950		33,208
Total losses	9,713	6,215	28,609	22,942
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Tractors
Revenue Earning Equipment [Line Items]
Assets held for sale	24,897		24,897		27,976
Total losses	1,317	1,127	6,795	18,444
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Trailers
Revenue Earning Equipment [Line Items]
Assets held for sale	1,770		1,770		$ 2,100
Total losses	$ 502	$ 1,871	$ 3,700	$ 5,044