Revenue Earning Equipment - Schedule of Revenue Earning Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Revenue Earning Equipment [Line Items]
Cost	$ 11,913,392	$ 10,890,902
Accumulated Depreciation	(3,876,682)	(3,689,016)
Net Book Value	8,036,710	7,201,886
Held for use: Full service lease [Member]
Revenue Earning Equipment [Line Items]
Cost	8,612,790	8,008,122
Accumulated Depreciation	(2,699,055)	(2,598,140)
Net Book Value	5,913,735	5,409,982
Held for use: Commercial rental [Member]
Revenue Earning Equipment [Line Items]
Cost	2,932,196	2,570,081
Accumulated Depreciation	(924,004)	(864,543)
Net Book Value	2,008,192	1,705,538
Held-for-sale [Member]
Revenue Earning Equipment [Line Items]
Cost	368,406	312,699
Accumulated Depreciation	(253,623)	(226,333)
Net Book Value	114,783	86,366
Assets Held under Capital Leases [Member]
Revenue Earning Equipment [Line Items]
Cost	47,500	47,800
Accumulated Depreciation	$ (21,000)	$ (22,500)