Other Assets - Other Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Other Assets [Line Items]
Other assets	$ 493,187		$ 410,305
Upfront Fee
Other Assets [Line Items]
Other assets	132,500	[1]	140,000	[1]
Inventory of Repossessed Vehicles
Other Assets [Line Items]
Other assets	140,792		129,323
Manufacturer Subvention Payments Receivable
Other Assets [Line Items]
Other assets	73,240	[1]	55,579	[1]
Derivative Assets
Other Assets [Line Items]
Other assets	47,168		29,875
Indemnification Payments Receivable
Other Assets [Line Items]
Other assets	8,603	[2]	8,603	[2]
Other
Other Assets [Line Items]
Other assets	$ 90,884		$ 46,925

[1] These amounts relate to the Chrysler agreement. The Company paid a $150,000 upfront fee at the effective date of the agreement. This fee is being amortized into finance and other interest income over the ten-year term of the agreement. As the preferred financing provider for Chrysler, the Company is entitled to subvention payments on loans and leases with below-market customer payments.

[2] This amount represents tax indemnification payments to the original equity investors in two investment partnerships now owned by the Company. These payments are expected to be recovered through tax refunds passed through to the Company as the original investors recognize losses related to the investments.