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Supplemental Cash Flow Information
12 Months Ended
Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information

15. Supplemental Cash Flow Information

The following table summarizes supplemental cash flow information (in thousands):

 

Fiscal Year

   2011      2010      2009  

Cash paid during the year for:

        

Interest

   $ 3,323       $ 1,026       $ 443   

Income taxes

   $ 135,133       $ 107,787       $ 62,957   

Supplemental disclosures of non-cash investing and financing activities:

        

Additions to property, plant and equipment included in accounts payable

   $ 23,766       $ 8,034       $ 4,349   

Retirement of treasury stock

   $ 482       $ 725       $ 212