Equity Investees (Schedule Of Balance Sheet Information For Equity Investees) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Equity Method Investments and Joint Ventures [Abstract]
Current Assets	$ 74,906	$ 12,732
Fixed Assets, net	832,525	441,894
Other Assets	10,202	18,000
Total Assets	917,633	472,626
Current Liabilities	112,321	5,891
Other Liabilities	134,731	8,536
Equity	670,581	458,199
Total Liabilities and Equity	$ 917,633	$ 472,626