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Intangibles - Intangible Assets Other Than Goodwill and Trade Names (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	$ 3,739,470	$ 547,089
Intellectual property, patents, non-compete and other intangibles
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	2,697,919	15,328
Intangible assets, accumulated amortization	51,127	42,446
Customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	1,041,551	531,761
Intangible assets, accumulated amortization	$ 168,774	$ 158,533

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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