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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 572,619 | $ 575,911 | $ 1,126,598 | $ 1,127,430
Income before income taxes | 769,601 | 340,086 | 1,896,867 | 1,203,775
Life Science [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 212,400 | 217,800 | 428,100 | 415,600
Income before income taxes | 11,400 | 12,200 | 34,300 | 15,500
Clinical Diagnostics [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 357,100 | 354,000 | 691,100 | 704,800
Income before income taxes | 42,400 | 27,800 | 73,200 | 64,400
Other Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 3,100 | 4,100 | 7,400 | 7,000
Income before income taxes | $ (500) | $ 0 | $ (600) | $ 0

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