Derivative Instruments (Schedule Of Net Change Recognized And The Amounts And Location Of Income (Expense) And Gain (Loss) Reclassified Into Income For Interest Rate Contracts And Foreign Currency Contracts) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Interest Rate Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income	$ (36,295)	$ (16,347)	$ (36,407)	$ (43,102)
Expense and Gain Reclassified into Income	(1,515)	(2,146)	(4,593)	(6,751)
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income		93	(55)	95
Expense and Gain Reclassified into Income		$ 36	$ 227	$ 48