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Related Parties' Transactions And Balances (Tables)
 12 Months Ended
Dec. 31, 2020
Related Party Transaction, Due from (to) Related Party [Abstract]  
Schedule Of Related Parties Transactions And Balances
Transactions:Year ended December 31,
 202020192018
Income -   
Sales to related-party companies (*)
$187,014 $183,012 $181,566 
Participation in expenses$1,487 $2,576 $2,580 
Cost and expenses -   
Supplies from related parties (**)
$8,476 $13,467 $8,188 

Balances:December 31,
 20202019
Trade receivables and other receivables (*)
$67,250 $73,076 
Trade payables and advances (**)
$34,890 $23,518 

The sales to the Company’s related parties in respect of U.S. government defense contracts are made on the basis of cost.

(*)    A significant portion of the sales and balances include sales of helmet mounted cueing systems purchased from the Company by a 50%-owned affiliate of ESA.
(**)    Includes mainly electro-optics components and sensors, purchased by the Company from a 50%-owned Israeli partnership, and electro-optics products purchased by the Company from another 50%-owned Israeli affiliate.