4. Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 562,400	$ 518,800
Accumulated impairment loss	(41,700)	(41,700)
Goodwill, net	520,706	477,115
Goodwill, Acquired During Period	28,100
Currency fluctuations	15,500
Life Science [Member]
Goodwill [Line Items]
Goodwill	235,800	207,100
Accumulated impairment loss	(27,200)	(27,200)
Goodwill, net	208,600	179,900
Goodwill, Acquired During Period	28,100
Currency fluctuations	600
Clinical Diagnostics [Member]
Goodwill [Line Items]
Goodwill	326,600	311,700
Accumulated impairment loss	(14,500)	(14,500)
Goodwill, net	312,100	$ 297,200
Goodwill, Acquired During Period	0
Currency fluctuations	$ 14,900

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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