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Statement of Cash Flows (Tables)
6 Months Ended
Jun. 30, 2012
Statement of Cash Flows [Abstract]  
Supplemental cash flow information
                 
    Six Months Ended  
    June 30,
2012
    July 2,
2011
 
    (In thousands)  

Cash Paid During the Period for:

               

Interest

  $ 5,677     $ 6,708  

Income taxes, including foreign withholding tax

  $ 9,801     $ 9,209  
     

Non-cash Investing and Financing Activities:

               

Stock options assumed for acquisition

  $ —       $ 1,600  

Available-for-sale securities received from customer

  $ 15     $ 160