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Derivative Financial Instruments (Details Textual) (Interest Rate Contract [Member], Cash Flow Hedging [Member], USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest Rate Contract [Member] \| Cash Flow Hedging [Member]
Derivative Financial Instruments (Textual) [Abstract]
Interest rate hedges designated and qualifying as a cash flow hedge	$ 16,000,000	$ 0	$ 73,000,000	$ 63,000

- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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