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Deferred Revenue And Customer Advances (Tables)
 6 Months Ended
Jul. 03, 2011
Deferred Revenue And Customer Advances  
Schedule Of Deferred Revenue And Customer Advances
     July 3,
2011		      December 31,
2010		  
     (in thousands)  

Customer advances

    $ 105,696       $ 132,559   

Maintenance, training and extended warranty

      34,739         36,626   

Undelivered elements

      7,401         5,858   

Acceptance

      951         2,083   
  

 

 

     

 

 

  

Total deferred revenue and customer advances

    $ 148,787       $ 177,126