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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 |

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