Goodwill (Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Goodwill, Gross, Beginning balance	$ 2,434,881	$ 2,291,034
Accumulated impairment losses, Beginning balance	(1,650,320)	(1,650,320)
Goodwill, Beginning balance	784,561	640,714
Additions	80,251	142,554
Dispositions	(15,451)
Foreign currency translation and other	(8,122)	1,293
Goodwill, Gross, Ending balance	2,491,559	2,434,881
Accumulated impairment losses, Ending balance	(1,650,320)	(1,650,320)
Goodwill, Ending balance	$ 841,239	$ 784,561