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Business Combinations Business Combinations Pro forma (Details) (Caliper Life Sciences [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 03, 2011
Jul. 03, 2011
Caliper Life Sciences [Member]
   
Business Acquisition [Line Items]    
Business Acquisition, Pro Forma Revenue $ 517,102 $ 999,761
Business Acquisition, Pro Forma Net Income (Loss) $ 17,686 $ 33,543
Business Acquisition, Pro Forma Earnings Per Share, Basic $ 0.16 $ 0.30
Business Acquisition, Pro Forma Earnings Per Share, Diluted $ 0.16 $ 0.29