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Business Segment Information (Tables)
3 Months Ended
Mar. 29, 2014
Business Segment Information [Abstract]  
Revenue from External Customers by Products and Services

Net sales for the Company's products and services are as follows for the three months ended March 29, 2014 and March 30, 2013 (in thousands):

    Three Months Ended
    March 29, 2014 March 30, 2013
Product net sales:      
 Waters instrument systems $ 176,364 $ 184,524
 Chemistry   75,203   73,133
 TA instrument systems   33,228   36,057
  Total product sales   284,795   293,714
         
Service net sales:      
 Waters service   132,042   123,768
 TA service   13,671   12,856
  Total service sales   145,713   136,624
         
Total net sales $ 430,508 $ 430,338