Income Taxes (Schedule Of Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current taxes:
Federal	$ (574)	$ 709	$ 746
State and local	8,672	(25,308)	17,232
Foreign	(4,620)	3,504	12,375
Total current income taxes	3,478	(21,095)	30,353
Deferred taxes:
Federal	108,241	134,590	97,190
State and local	8,335	4,552	30,707
Foreign	2,055	(8,100)	7,721
Total deferred income taxes	118,631	131,042	135,618
Actual income tax provision	$ 122,109	$ 109,947	$ 165,971