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Related Parties Transactions And Balances (Schedule Of Related Parties Transactions And Balances) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Related Parties Transactions And Balances [Abstract] |  |  |  |  |  |
Sales to affiliated companies | $ 20,256 | [1] | $ 33,124 | [1] | $ 39,929 | [1]
Participation in expenses | 3,923 |  | 3,955 |  | 4,217 |
Supplies from affiliated companies | 44,840 | [2] | 57,339 | [2] | 64,058 | [2]
Trade receivables and other receivables | 21,696 | [1] | 20,970 | [1] |  |
Trade payables | $ 17,767 | [2] | $ 30,955 | [2] |  |
[1] | The significant sales and balances include sales of helmet mounted cueing systems purchased from the Company by VSI.
[2] | Includes electro-optics components and sensors, purchased by the Company from SCD, and electro-optics products, purchased by the Company, from Opgal.

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