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3. Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Goodwill [Line Items] |  |
Goodwill | $ 563,600 | $ 559,300
Accumulated impairment loss | (53,200) | (53,200)
Goodwill, net | 510,359 | 506,069
Goodwill, Written off Related to Sale of Business Unit | (1,400) |
Currency fluctuations | 5,700 |
Life Science [Member] |  |
Goodwill [Line Items] |  |
Goodwill | 234,800 | 234,700
Accumulated impairment loss | (35,900) | (35,900)
Goodwill, net | 198,900 | 198,800
Goodwill, Written off Related to Sale of Business Unit | 0 |
Currency fluctuations | 100 |
Clinical Diagnostics [Member] |  |
Goodwill [Line Items] |  |
Goodwill | 328,800 | 324,600
Accumulated impairment loss | (17,300) | (17,300)
Goodwill, net | 311,500 | $ 307,300
Goodwill, Written off Related to Sale of Business Unit | (1,400) |
Currency fluctuations | $ 5,600 |

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