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Major Customer And Geographic Information (Schedule Of Revenue By Geographic Areas) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenues By Area Of Operations [Line Items]      
Revenues $ 2,817,465 $ 2,670,133 $ 2,832,437
Europe [Member]
      
Revenues By Area Of Operations [Line Items]      
Revenues 545,509 541,749 728,232
U.S. [Member]
      
Revenues By Area Of Operations [Line Items]      
Revenues 890,352 843,985 813,460
Israel [Member]
      
Revenues By Area Of Operations [Line Items]      
Revenues 697,771 650,956 627,251
Other Regions [Member]
      
Revenues By Area Of Operations [Line Items]      
Revenues $ 683,833 [1] $ 633,443 [1] $ 663,494 [1]
[1] Mainly Asia and South America