Equity Investees And Other Investments (Schedule Of Operations For Equity Investees) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Equity Investees And Other Investments [Abstract]
Revenues	$ 56,353	$ 20,013	$ 14,793
Operating Income	16,363	5,881	775
Net Income	$ 16,322	$ 5,843	$ 749