Revenue Earning Equipment Level 3 Fair Value Measurement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue Earning Equipment [Line Items]
Total Losses	$ 12,551	$ 3,252	$ 19,839	$ 5,623
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	68,559	15,819	68,559	15,819
Total Losses		3,252		5,623
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Trucks [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	13,749	6,805	13,749	6,805
Total Losses	2,570	1,515	4,314	2,743
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Tractors [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	51,795	7,389	51,795	7,389
Total Losses	9,206	1,081	14,088	1,908
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Trailers [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	3,015	1,625	3,015	1,625
Total Losses	$ 775	$ 656	$ 1,437	$ 972