Revenue Earning Equipment Level 3 Fair Value Measurement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue Earning Equipment [Line Items]
Total Losses	$ 11,665	$ 4,329	$ 31,504	$ 9,952
Assets Held-for-sale, Long Lived, Fair Value Disclosure	75,800	145,100	75,800	145,100
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Revenue Earning Equipment [Line Items]
Assets Held For Sale Fair Value Disclosure	81,134	18,989	81,134	18,989
Total Losses	11,665	4,329	31,504	9,952
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Trucks [Member]
Revenue Earning Equipment [Line Items]
Assets Held For Sale Fair Value Disclosure	17,091	7,701	17,091	7,701
Total Losses	2,528	1,657	6,842	4,400
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Tractors [Member]
Revenue Earning Equipment [Line Items]
Assets Held For Sale Fair Value Disclosure	61,480	10,093	61,480	10,093
Total Losses	7,985	2,062	22,073	3,970
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Trailers [Member]
Revenue Earning Equipment [Line Items]
Assets Held For Sale Fair Value Disclosure	2,563	1,195	2,563	1,195
Total Losses	$ 1,152	$ 610	$ 2,589	$ 1,582