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Geographic Information And Selected Statements Of Income Data (Summary Of Long-Lived Assets By Geographic Area) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Schedule Of Geographical Information [Line Items]    
Long-lived assets $ 790,753 $ 820,882
U.S. [Member]
   
Schedule Of Geographical Information [Line Items]    
Long-lived assets 202,461 205,422
Israel [Member]
   
Schedule Of Geographical Information [Line Items]    
Long-lived assets 92,610 86,577
Sweden [Member]
   
Schedule Of Geographical Information [Line Items]    
Long-lived assets 494,895 528,002
Rest Of The World [Member]
   
Schedule Of Geographical Information [Line Items]    
Long-lived assets $ 787 $ 881