Revenue Earning Equipment Level 3 Fair Value Measurement (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue Earning Equipment [Line Items]
Assets held for sale	$ 54,430	$ 11,140
Total Losses	7,288	2,371
Trucks [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	11,538	5,298
Total Losses	1,744	1,228
Tractors [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	39,739	4,611
Total Losses	4,882	827
Trailers [Member]
Revenue Earning Equipment [Line Items]
Assets held for sale	3,153	1,231
Total Losses	$ 662	$ 316