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Major Customer And Geographic Information (Schedule Of Long-Lived Assets By Geographic Areas) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets $ 1,216,847 $ 1,280,680 $ 1,300,515
Israel [Member]
     
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets 863,945 875,935 985,953
U.S. [Member]
     
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets 208,309 208,640 225,217
Others [Member]
     
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets $ 144,594 $ 196,105 $ 89,345