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11. Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Net sales	$ 535,003	$ 508,745	$ 1,539,720	$ 1,496,719
Income before income taxes	38,855	22,688	60,122	69,747
Life Science [Member]
Segment Reporting Information [Line Items]
Net sales	193,600	178,100	547,300	523,900
Income before income taxes	7,800	(4,400)	(34,000)	(12,900)
Clinical Diagnostics [Member]
Segment Reporting Information [Line Items]
Net sales	338,000	327,100	982,300	962,500
Income before income taxes	35,400	28,400	94,300	77,000
All Other Segments [Member]
Segment Reporting Information [Line Items]
Net sales	3,400	3,500	10,100	10,300
Income before income taxes	$ 200	$ 300	$ 600	$ 500

X

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

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+ References

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