Revenue Earning Equipment (Details Textuals) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Revenue Earning Equipment (Textuals) [Abstract]
Cost	$ 10,536,606,000	$ 10,536,606,000	$ 10,086,939,000
Accumulated Depreciation	3,606,141,000	3,606,141,000	3,596,102,000
Effect of change in estimated residual values of revenue earning equipment on pre tax earnings	6,300,000	12,500,000
Net Investment in Direct Financing and Sales Type Leases	417,800,000	417,800,000	400,100,000
Financing Receivable, Allowance for Credit Losses	400,000	400,000	500,000
Assets Held under Capital Leases [Member]
Revenue Earning Equipment (Textuals) [Abstract]
Cost	48,100,000	48,100,000	54,200,000
Accumulated Depreciation	$ 20,100,000	$ 20,100,000	$ 22,000,000