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Comprehensive Income (Tables)
9 Months Ended
Sep. 30, 2011
Comprehensive Income [Abstract] 
Total comprehensive income
                                 
    Three months ended     Nine months ended  
    September 30, 2011     October 1, 2010     September 30, 2011     October 1, 2010  
    (In thousands)  

Net income (loss)

  $ 3,546     $ (361   $ 4,452     $ 9,403  

Change in unrealized gain (loss) on investments, net

    (10     5       (13     (339

Change in unrealized gain (loss) on foreign exchange contracts, net of tax

    —         43       —         (19

Foreign currency translation

    (444     567       79       (88
   

 

 

   

 

 

   

 

 

   

 

 

 

Total comprehensive income

  $ 3,092     $ 254     $ 4,518     $ 8,957