Equity Method Investments (Schedule Of Equity Method Investments Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Equity Method Investments [Roll Forward]
Beginning of year	$ 36,234	$ 40,350	$ 46,738
Loss from investments	(36,269)	(5,169)	(1,702)
Dispositions and other adjustments	4,376	1,053	(4,686)
End of year	$ 4,341	$ 36,234	$ 40,350