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4. Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill	$ 565,700	$ 555,000
Accumulated impairment loss	(335,200)	(335,200)
Goodwill, net	230,541	219,770
Goodwill, Acquired During Period	10,700
Life Science [Member]
Goodwill [Line Items]
Goodwill	245,200	234,500
Accumulated impairment loss	(41,800)	(41,800)
Goodwill, net	203,400	192,700
Goodwill, Acquired During Period	10,700
Clinical Diagnostics [Member]
Goodwill [Line Items]
Goodwill	320,500	320,500
Accumulated impairment loss	(293,400)	(293,400)
Goodwill, net	27,100	$ 27,100
Goodwill, Acquired During Period	$ 0

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

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+ References

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