Equity Investees (Schedule Of Balance Sheet Information For Equity Investees) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 65,250	$ 12,732
Fixed assets, net	760,788	441,894
Other assets	10,964	18,000
Total assets	837,002	472,626
Current liabilities	53,667	5,891
Other liabilities	118,226	8,536
Equity	665,109	458,199
Total liabilities and equity	$ 837,002	$ 472,626