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Long-Term Trade And Unbilled Receivables (Tables)
12 Months Ended
Dec. 31, 2012
Long-Term Trade And Unbilled Receivables [Abstract]  
Schedule Of Long-Term Trade And Unbilled Receivables
                 
 
 
December 31,
 
 
 
2012
 
 
2011
 
Receivables                                                                                             
 
$
        201
 
 
$
5,303
 
Unbilled receivables                                                                                             
 
 
229,486
 
 
 
157,459
 
 
 
$
229,687
 
 
$
162,762