Leased Vehicles, Net - Summary of Leased Vehicles (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Property Subject To Or Available For Operating Lease [Line Items]
Leased property expenses	$ 3,986,944	$ 2,145,616
Less: accumulated depreciation	(419,398)	(122,183)
Leased property expenses, net	3,567,546	2,023,433
Leased Vehicles
Property Subject To Or Available For Operating Lease [Line Items]
Leased property expenses	4,481,384	2,402,052
Origination Fees and Other Costs
Property Subject To Or Available For Operating Lease [Line Items]
Leased property expenses	1,157	2,716
Manufacturer Subvention Payments
Property Subject To Or Available For Operating Lease [Line Items]
Leased property expenses	$ (495,597)	$ (259,152)