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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 |  |

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- 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 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 + Details
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- Definition 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 -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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