Revenue Earning Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenue Earning Equipment [Line Items]
Cost	$ 10,643,152	$ 10,086,939
Accumulated Depreciation	(3,648,704)	(3,596,102)
Net Book Value	6,994,448	6,490,837
Held for use: Full service lease [Member]
Revenue Earning Equipment [Line Items]
Cost	7,918,497	7,436,093
Accumulated Depreciation	(2,591,688)	(2,537,077)
Net Book Value	5,326,809	4,899,016
Estimated Useful Life, Minimum	3 years
Estimated Useful Life, Maximum	12 years
Held for use: Commercial rental [Member]
Revenue Earning Equipment [Line Items]
Cost	2,411,957	2,210,863
Accumulated Depreciation	(830,683)	(747,283)
Net Book Value	1,581,274	1,463,580
Estimated Useful Life, Minimum	4 years 6 months
Estimated Useful Life, Maximum	12 years
Held-for-sale [Member]
Revenue Earning Equipment [Line Items]
Cost	312,698	439,983
Accumulated Depreciation	(226,333)	(311,742)
Net Book Value	$ 86,365	$ 128,241