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Trade And Unbilled Receivables, Net (Tables)
 12 Months Ended
Dec. 31, 2015
Accounts Receivable, Net [Abstract]  
Schedule Of Trade And Unbilled Receivables, Net
 
December 31,
 
2015
 
2014
Receivables (1)
$
562,616

 
$
556,950

Unbilled receivables
386,035

 
379,252

Less – allowance for doubtful accounts
(6,738
)
 
(7,445
)
 
$
941,913

 
$
928,757

 
 
 
 
(1) Includes receivables due from affiliated companies
$
76,598

 
$
80,290