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Major Customer And Geographic Information (Schedule Of Revenues By Major Customers) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenue, Major Customer [Line Items]      
Revenue $ 2,817,465 $ 2,670,133 $ 2,832,437
Airborne Systems [Member]
      
Revenue, Major Customer [Line Items]      
Revenue 969,446 791,111 693,229
Land Vehicles Systems [Member]
      
Revenue, Major Customer [Line Items]      
Revenue 405,294 363,245 449,712
C Power Four ISR Systems [Member]
      
Revenue, Major Customer [Line Items]      
Revenue 996,382 1,019,068 1,168,848
Electro-Optic Systems [Member]
      
Revenue, Major Customer [Line Items]      
Revenue 300,158 368,808 406,396
Other [Member]
      
Revenue, Major Customer [Line Items]      
Revenue $ 146,185 [1] $ 127,901 [1] $ 114,252 [1]
[1] Mainly non-defense engineering and production services.