Equity Investees (Schedule Of Operations For Equity Investees) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 189,941	$ 246,265	$ 183,533
Operating Income	26,101	146,760	102,107
Net Income	$ 7,810	$ 142,754	$ 99,357