Equity Investees (Schedule Of Operations For Equity Investees) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 45,574	$ 72,090
Operating income	28,825	48,113
Net income	$ 27,643	$ 46,917