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11. Segment Reporting (Details) (USD $) In Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 516,514 | $ 471,502 | $ 1,523,291 | $ 1,393,398
Income from operations | 73,922 | 74,802 | 209,226 | 206,225
Life Science [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 171,500 | 153,200 | 495,900 | 455,300
Income from operations | 12,500 | 11,400 | 25,600 | 30,500
Clinical Diagnostics [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 341,300 | 314,900 | 1,016,500 | 928,800
Income from operations | 49,500 | 49,600 | 144,100 | 134,600
All Other Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 3,700 | 3,400 | 10,900 | 9,300
Income from operations | 500 | 300 | 1,100 | 500
Reportable Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income from operations | $ 62,500 | $ 61,300 | $ 170,900 | $ 165,600

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