Changes in Carrying Value of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Balance	$ 326,735	$ 327,333
Cumulative translation adjustment	(343)	(801)
Balance	468,413	326,735
C Technologies, Inc.
Goodwill [Line Items]
Goodwill arising from Acquisition	142,021
Balance	$ 142,021
Spectrum Inc.
Goodwill [Line Items]
Goodwill arising from Acquisition		$ 203

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 45
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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