Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) In Thousands, unless otherwise specified	Dec. 31, 2011 AUD	Dec. 31, 2011 CAD	Dec. 31, 2011 CHF	Dec. 31, 2011 CNY	Dec. 31, 2011 EUR (€)	Dec. 31, 2011 GBP (£)	Dec. 31, 2011 HKD	Dec. 31, 2011 INR	Dec. 31, 2011 JPY (¥)	Dec. 31, 2011 SGD
Summary of Derivative Instruments [Abstract]
Net notional foreign currency forward contracts outstanding	2,386	2,168	15,938	18,757	€ 21,120	£ 20,828	24,733	329,659	¥ 978,252	3,155