Equity Investees (Schedule Of Operations For Equity Investees) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 82,553	$ 46,440	$ 154,643	$ 96,264
Operating income	56,408	22,628	104,521	53,103
Net income	$ 55,230	$ 21,815	$ 102,147	$ 51,521