Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) In Thousands, unless otherwise specified	Dec. 31, 2012 AUD	Dec. 31, 2012 CAD	Dec. 31, 2012 CHF	Dec. 31, 2012 CNY	Dec. 31, 2012 DKK	Dec. 31, 2012 EUR (€)	Dec. 31, 2012 GBP (£)	Dec. 31, 2012 HKD	Dec. 31, 2012 INR	Dec. 31, 2012 JPY (¥)	Dec. 31, 2012 SGD
Summary of Derivative Instruments [Abstract]
Net notional foreign currency forward contracts outstanding	7,574	5,855	16,976	61,066	4,800	€ 24,250	£ 32,158	51,999	909,790	¥ 605,633	9,543