Financial Instruments, Derivative Instruments And Hedging (Schedule Of Unhedged Foreign Currency Transactions) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Japanese Yen [Member] USD ($)	Dec. 31, 2011 Japanese Yen [Member] JPY (¥)	Dec. 31, 2011 Euros [Member] USD ($)	Dec. 31, 2011 Euros [Member] EUR (€)
Trading Activity, Gains and Losses, Net [Line Items]
Future revenues denominated in foreign currencies not hedged	$ 650	¥ 50,062	$ 22,867	€ 17,635
Future expenditures denominated in foreign currencies not hedged	$ 29,567	¥ 2,275,318	$ 6,894	€ 5,317