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11. Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 510,422 | $ 521,656 | $ 996,699 | $ 1,006,777
Segment profit (loss) | 73,308 | 68,186 | 127,674 | 135,304
Life Science [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 162,400 | 169,900 | 317,200 | 324,400
Segment profit (loss) | 5,400 | 10,000 | 1,500 | 13,100
Clinical Diagnostics [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 344,000 | 348,000 | 671,200 | 675,200
Segment profit (loss) | 55,400 | 46,600 | 101,200 | 94,600
All Other Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 4,000 | 3,700 | 8,300 | 7,200
Segment profit (loss) | 800 | 500 | 1,600 | 700
Reportable Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment profit (loss) | $ 61,600 | $ 57,100 | $ 104,300 | $ 108,400

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