Leased Vehicles Leased Vehicles Summary (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Successor [Member]	Mar. 31, 2012 Successor [Member]
Leased Vehicles Summary [Line Items]
Leased Vehicles Accounted For Operating Leases Net Of Manufacturing Incentives	$ 2,444,326	$ 1,975,624	$ 1,975,624	$ 886,956
Leased Vehicles Purchased			620,350	383,799
Leased Vehicles Returned (End of Term)			(52,141)	(13,550)
Leased Vehicles Returned (Default)			(3,987)	(1,241)
Manufacturing Incentives			(81,319)	(51,368)
Foreign Currency Translation On Leases			(14,201)	5,838
Leased Vehicles Accounted For Operating Leases Net Of Manufacturing Incentives	$ 2,444,326	$ 1,975,624	$ 2,444,326	$ 1,210,434