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Segments, Customers And Geographic Information (Schedule Of Revenues From Sales To Unaffiliated Customers) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
segment
Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of reportable segments   1  
Revenues $ 446,651 $ 445,269 $ 249,852
Long-loved assets 33,642 30,465 16,211
North America [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 40,496 46,442 41,450
Europe [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 97,133 101,324 56,923
Africa [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 58,212 57,701 9,968
Asia-Pacific and Middle East [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 70,704 90,461 28,119
INDIA
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 54,358 44,608 95,674
Latin America [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 125,748 104,733 17,718
ISRAEL
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-loved assets 27,837 22,502 15,325
Others [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-loved assets $ 5,805 $ 7,963 $ 886