Goodwill And Intangible Assets (Schedule Of Goodwill) (Details) (USD $) In Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Goodwill And Intangible Assets [Abstract]
Balance at beginning of period	$ 810,285	$ 761,978
Additions	10,255	47,469
Adjustments to purchase price allocations	3,932
Translation and other adjustments	(2,741)	838
Balance at end of period	$ 821,731	$ 810,285