Equity Investees (Schedule Of Operations For Equity Investees) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 162,267	$ 56,353	$ 20,013
Operating Income	80,841	16,363	5,881
Net Income	$ 77,975	$ 16,322	$ 5,843