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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 726,796	$ 571,644
Income before income taxes	1,297,203	898,699
Life Science [Member]
Segment Reporting Information [Line Items]
Net sales	366,500	227,200
Income before income taxes	102,300	23,700
Clinical Diagnostics [Member]
Segment Reporting Information [Line Items]
Net sales	358,500	340,300
Income before income taxes	(1,900)	43,800
Other Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,800	4,100
Income before income taxes	$ 100	$ 1,100

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