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4. Goodwill and other Purchased Intangible Assets Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill period start	$ 518,800	$ 524,100	$ 518,800	$ 524,100
Accumulated impairment loss period start	(41,700)	(28,200)	(41,700)	(28,200)
Goodwill, net period start	477,115	495,900	477,115	495,900
Goodwill, Acquired During Period			26,200	100
Goodwill, Impairment Loss			11,500	13,500
Currency fluctuations			14,300	(5,400)
Goodwill period end			559,300	518,800
Accumulated impairment loss period end			(53,200)	(41,700)
Goodwill, net period end			506,069	477,115
Life Science [Member]
Goodwill [Roll Forward]
Goodwill period start	207,100	207,200	207,100	207,200
Accumulated impairment loss period start	(27,200)	(27,200)	(27,200)	(27,200)
Goodwill, net period start	179,900	180,000	179,900	180,000
Goodwill, Acquired During Period			26,200	100
Goodwill, Impairment Loss			8,700	0
Currency fluctuations			1,400	(200)
Goodwill period end			234,700	207,100
Accumulated impairment loss period end			(35,900)	(27,200)
Goodwill, net period end			198,800	179,900
Clinical Diagnostics [Member]
Goodwill [Roll Forward]
Goodwill period start	311,700	316,900	311,700	316,900
Accumulated impairment loss period start	(14,500)	(1,000)	(14,500)	(1,000)
Goodwill, net period start	297,200	315,900	297,200	315,900
Goodwill, Acquired During Period			0	0
Goodwill, Impairment Loss			2,800	13,500
Currency fluctuations			12,900	(5,200)
Goodwill period end			324,600	311,700
Accumulated impairment loss period end			(17,300)	(14,500)
Goodwill, net period end			$ 307,300	$ 297,200
RainDance Technologies, Inc. [Member]
Goodwill [Roll Forward]
Goodwill, Acquired During Period	$ 26,200
Analytical Flow Cytometer Platform [Member]
Goodwill [Roll Forward]
Goodwill, Acquired During Period		$ 100

X

- Definition

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.

+ References

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

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-Name Accounting Standards Codification
-Topic 350
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-Section 45
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
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-Section 50
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-Subparagraph (f)
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Amount before 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.

+ References

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+ References

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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