Derivative Instruments And Hedging Activities (Gain/(Loss) Recognized In Income On Hedged Debt) (Details) (Fair Value Hedges [Member], Medium-Term Notes [Member], Interest Rate Swaps [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Fair Value Hedges [Member] | Medium-Term Notes [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Recognized in Income on Derivative		[1]	$ (6,072)	[1]	$ (3,626)	[1]
Amount of Gain Recognized in Income on Hedged Debt		[1]	$ 6,072	[1]	$ 3,626	[1]

[1] Gain/(loss) recognized in income is included in financial services interest expense.